/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/array28_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 20:20:29,858 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 20:20:29,941 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 20:20:29,945 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 20:20:29,945 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 20:20:29,973 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 20:20:29,973 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 20:20:29,973 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 20:20:29,974 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 20:20:29,977 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 20:20:29,978 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 20:20:29,978 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 20:20:29,978 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 20:20:29,979 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 20:20:29,979 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 20:20:29,980 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 20:20:29,980 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 20:20:29,980 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 20:20:29,980 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 20:20:29,981 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 20:20:29,982 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 20:20:29,982 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 20:20:29,982 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 20:20:29,982 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 20:20:29,982 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 20:20:29,983 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 20:20:29,983 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 20:20:29,983 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 20:20:29,984 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 20:20:29,984 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 20:20:29,985 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 20:20:29,985 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 20:20:29,985 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 20:20:29,985 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 20:20:29,985 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 20:20:29,985 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 20:20:29,985 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 20:20:29,986 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 20:20:29,986 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 20:20:29,986 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 20:20:29,986 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 20:20:29,986 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 20:20:29,987 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 20:20:29,987 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 20:20:30,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 20:20:30,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 20:20:30,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 20:20:30,211 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 20:20:30,212 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 20:20:30,213 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array28_pattern.c [2023-12-18 20:20:31,308 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 20:20:31,491 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 20:20:31,492 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array28_pattern.c [2023-12-18 20:20:31,499 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5514511d1/d89b698bc37e454390ad02ac3a234ca4/FLAG2ad5a2387 [2023-12-18 20:20:31,513 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5514511d1/d89b698bc37e454390ad02ac3a234ca4 [2023-12-18 20:20:31,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 20:20:31,517 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 20:20:31,519 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 20:20:31,519 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 20:20:31,523 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 20:20:31,524 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:20:31" (1/1) ... [2023-12-18 20:20:31,524 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d76cd4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:20:31, skipping insertion in model container [2023-12-18 20:20:31,525 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:20:31" (1/1) ... [2023-12-18 20:20:31,544 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 20:20:31,686 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/array28_pattern.c[1246,1259] [2023-12-18 20:20:31,700 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 20:20:31,707 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 20:20:31,717 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/array28_pattern.c[1246,1259] [2023-12-18 20:20:31,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 20:20:31,735 INFO L206 MainTranslator]: Completed translation [2023-12-18 20:20:31,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:20:31 WrapperNode [2023-12-18 20:20:31,736 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 20:20:31,737 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 20:20:31,737 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 20:20:31,737 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 20:20:31,743 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:20:31" (1/1) ... [2023-12-18 20:20:31,748 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:20:31" (1/1) ... [2023-12-18 20:20:31,764 INFO L138 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-12-18 20:20:31,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 20:20:31,765 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 20:20:31,765 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 20:20:31,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 20:20:31,774 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:20:31" (1/1) ... [2023-12-18 20:20:31,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:20:31" (1/1) ... [2023-12-18 20:20:31,780 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:20:31" (1/1) ... [2023-12-18 20:20:31,790 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2023-12-18 20:20:31,790 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:20:31" (1/1) ... [2023-12-18 20:20:31,790 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:20:31" (1/1) ... [2023-12-18 20:20:31,802 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:20:31" (1/1) ... [2023-12-18 20:20:31,805 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:20:31" (1/1) ... [2023-12-18 20:20:31,806 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:20:31" (1/1) ... [2023-12-18 20:20:31,807 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:20:31" (1/1) ... [2023-12-18 20:20:31,808 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 20:20:31,809 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 20:20:31,809 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 20:20:31,809 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 20:20:31,810 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:20:31" (1/1) ... [2023-12-18 20:20:31,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 20:20:31,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:20:31,849 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 20:20:31,872 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 20:20:31,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 20:20:31,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 20:20:31,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 20:20:31,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 20:20:31,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 20:20:31,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 20:20:31,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 20:20:31,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 20:20:31,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 20:20:31,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 20:20:31,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 20:20:31,973 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 20:20:31,977 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 20:20:32,168 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 20:20:32,195 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 20:20:32,196 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-18 20:20:32,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:20:32 BoogieIcfgContainer [2023-12-18 20:20:32,196 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 20:20:32,198 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 20:20:32,198 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 20:20:32,202 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 20:20:32,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 08:20:31" (1/3) ... [2023-12-18 20:20:32,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d687d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:20:32, skipping insertion in model container [2023-12-18 20:20:32,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:20:31" (2/3) ... [2023-12-18 20:20:32,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d687d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:20:32, skipping insertion in model container [2023-12-18 20:20:32,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:20:32" (3/3) ... [2023-12-18 20:20:32,205 INFO L112 eAbstractionObserver]: Analyzing ICFG array28_pattern.c [2023-12-18 20:20:32,221 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 20:20:32,222 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 20:20:32,269 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 20:20:32,275 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;@577c04bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 20:20:32,275 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 20:20:32,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:20:32,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-18 20:20:32,283 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:20:32,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:20:32,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:20:32,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:20:32,291 INFO L85 PathProgramCache]: Analyzing trace with hash -2030311630, now seen corresponding path program 1 times [2023-12-18 20:20:32,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:20:32,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782407493] [2023-12-18 20:20:32,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:32,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:20:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:20:32,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:20:32,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782407493] [2023-12-18 20:20:32,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-18 20:20:32,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041100914] [2023-12-18 20:20:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:32,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:20:32,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:20:32,428 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 20:20:32,461 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 20:20:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:20:32,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-18 20:20:32,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:20:32,544 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 20:20:32,544 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 20:20:32,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041100914] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 20:20:32,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 20:20:32,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 20:20:32,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847989547] [2023-12-18 20:20:32,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 20:20:32,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 20:20:32,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:20:32,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 20:20:32,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 20:20:32,610 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 20:20:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:20:32,633 INFO L93 Difference]: Finished difference Result 36 states and 57 transitions. [2023-12-18 20:20:32,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 20:20:32,635 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 20:20:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:20:32,648 INFO L225 Difference]: With dead ends: 36 [2023-12-18 20:20:32,648 INFO L226 Difference]: Without dead ends: 17 [2023-12-18 20:20:32,651 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 20:20:32,656 INFO L413 NwaCegarLoop]: 21 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, 21 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 20:20:32,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:20:32,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-18 20:20:32,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-18 20:20:32,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 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 20:20:32,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-12-18 20:20:32,684 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2023-12-18 20:20:32,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:20:32,684 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-12-18 20:20:32,685 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 20:20:32,685 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-12-18 20:20:32,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-18 20:20:32,686 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:20:32,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:20:32,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-18 20:20:32,892 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 20:20:32,892 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:20:32,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:20:32,893 INFO L85 PathProgramCache]: Analyzing trace with hash 653692812, now seen corresponding path program 1 times [2023-12-18 20:20:32,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:20:32,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362607552] [2023-12-18 20:20:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:32,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:20:32,906 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:20:32,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706302444] [2023-12-18 20:20:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:32,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:20:32,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:20:32,912 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 20:20:32,925 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 20:20:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:20:32,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 20:20:32,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:20:33,005 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 20:20:33,006 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 20:20:33,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:20:33,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362607552] [2023-12-18 20:20:33,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:20:33,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706302444] [2023-12-18 20:20:33,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706302444] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 20:20:33,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 20:20:33,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 20:20:33,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219793769] [2023-12-18 20:20:33,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 20:20:33,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 20:20:33,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:20:33,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 20:20:33,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 20:20:33,009 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.25) 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 20:20:33,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:20:33,027 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2023-12-18 20:20:33,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 20:20:33,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) 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 20:20:33,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:20:33,028 INFO L225 Difference]: With dead ends: 24 [2023-12-18 20:20:33,029 INFO L226 Difference]: Without dead ends: 20 [2023-12-18 20:20:33,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-18 20:20:33,030 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:20:33,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 44 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:20:33,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-18 20:20:33,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-18 20:20:33,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 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 20:20:33,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-12-18 20:20:33,034 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 9 [2023-12-18 20:20:33,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:20:33,034 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-12-18 20:20:33,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) 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 20:20:33,035 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2023-12-18 20:20:33,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-18 20:20:33,035 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:20:33,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:20:33,043 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 20:20:33,243 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 20:20:33,244 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:20:33,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:20:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1025916596, now seen corresponding path program 1 times [2023-12-18 20:20:33,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:20:33,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978837437] [2023-12-18 20:20:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:33,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:20:33,254 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:20:33,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1848355330] [2023-12-18 20:20:33,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:33,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:20:33,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:20:33,257 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 20:20:33,268 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 20:20:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:20:33,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 20:20:33,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:20:33,346 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 20:20:33,347 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 20:20:33,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:20:33,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978837437] [2023-12-18 20:20:33,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:20:33,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848355330] [2023-12-18 20:20:33,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848355330] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 20:20:33,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 20:20:33,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-18 20:20:33,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169137082] [2023-12-18 20:20:33,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 20:20:33,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-18 20:20:33,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:20:33,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-18 20:20:33,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 20:20:33,350 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:20:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:20:33,427 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2023-12-18 20:20:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 20:20:33,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-18 20:20:33,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:20:33,429 INFO L225 Difference]: With dead ends: 43 [2023-12-18 20:20:33,429 INFO L226 Difference]: Without dead ends: 31 [2023-12-18 20:20:33,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-18 20:20:33,430 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:20:33,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 25 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:20:33,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-18 20:20:33,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2023-12-18 20:20:33,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 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 20:20:33,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2023-12-18 20:20:33,435 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 13 [2023-12-18 20:20:33,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:20:33,435 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-12-18 20:20:33,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:20:33,435 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2023-12-18 20:20:33,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-18 20:20:33,436 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:20:33,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:20:33,449 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 20:20:33,641 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 20:20:33,642 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:20:33,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:20:33,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1708286201, now seen corresponding path program 1 times [2023-12-18 20:20:33,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:20:33,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210172457] [2023-12-18 20:20:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:33,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:20:33,652 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:20:33,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131465785] [2023-12-18 20:20:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:33,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:20:33,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:20:33,655 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 20:20:33,658 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 20:20:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:20:33,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 20:20:33,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:20:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 20:20:33,721 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 20:20:33,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:20:33,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210172457] [2023-12-18 20:20:33,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:20:33,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131465785] [2023-12-18 20:20:33,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131465785] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 20:20:33,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 20:20:33,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 20:20:33,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463592854] [2023-12-18 20:20:33,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 20:20:33,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 20:20:33,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:20:33,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 20:20:33,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 20:20:33,723 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:20:33,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:20:33,764 INFO L93 Difference]: Finished difference Result 42 states and 58 transitions. [2023-12-18 20:20:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 20:20:33,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-18 20:20:33,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:20:33,765 INFO L225 Difference]: With dead ends: 42 [2023-12-18 20:20:33,765 INFO L226 Difference]: Without dead ends: 25 [2023-12-18 20:20:33,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 20:20:33,767 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:20:33,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 14 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:20:33,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-18 20:20:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-12-18 20:20:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 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 20:20:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-12-18 20:20:33,772 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 16 [2023-12-18 20:20:33,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:20:33,772 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-12-18 20:20:33,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:20:33,772 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-12-18 20:20:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-18 20:20:33,773 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:20:33,773 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 20:20:33,780 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 20:20:33,978 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 20:20:33,978 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:20:33,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:20:33,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1430262615, now seen corresponding path program 1 times [2023-12-18 20:20:33,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:20:33,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437008667] [2023-12-18 20:20:33,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:33,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:20:33,989 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:20:33,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602032462] [2023-12-18 20:20:33,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:33,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:20:33,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:20:33,991 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 20:20:33,994 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 20:20:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:20:34,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-18 20:20:34,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:20:34,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 20:20:34,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 20:20:34,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:20:34,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437008667] [2023-12-18 20:20:34,059 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:20:34,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602032462] [2023-12-18 20:20:34,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602032462] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 20:20:34,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 20:20:34,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 20:20:34,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467095946] [2023-12-18 20:20:34,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 20:20:34,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 20:20:34,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:20:34,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 20:20:34,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 20:20:34,061 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 20:20:34,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:20:34,105 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2023-12-18 20:20:34,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 20:20:34,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 20:20:34,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:20:34,108 INFO L225 Difference]: With dead ends: 53 [2023-12-18 20:20:34,108 INFO L226 Difference]: Without dead ends: 34 [2023-12-18 20:20:34,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 20:20:34,109 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:20:34,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 21 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:20:34,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-18 20:20:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2023-12-18 20:20:34,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:20:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-12-18 20:20:34,115 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 19 [2023-12-18 20:20:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:20:34,115 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-12-18 20:20:34,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 20:20:34,115 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-12-18 20:20:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-18 20:20:34,115 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:20:34,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:20:34,127 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 20:20:34,321 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 20:20:34,321 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:20:34,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:20:34,323 INFO L85 PathProgramCache]: Analyzing trace with hash -162284978, now seen corresponding path program 1 times [2023-12-18 20:20:34,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:20:34,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890570549] [2023-12-18 20:20:34,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:34,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:20:34,341 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:20:34,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366006760] [2023-12-18 20:20:34,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:34,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:20:34,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:20:34,352 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 20:20:34,370 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 20:20:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:20:34,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-18 20:20:34,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:20:34,569 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 20:20:34,722 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 20:20:34,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:20:34,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-12-18 20:20:34,830 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 28 treesize of output 26 [2023-12-18 20:20:34,892 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 20:20:34,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:20:34,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890570549] [2023-12-18 20:20:34,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:20:34,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366006760] [2023-12-18 20:20:34,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366006760] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:20:34,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:20:34,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2023-12-18 20:20:34,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895264717] [2023-12-18 20:20:34,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:20:34,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 20:20:34,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:20:34,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 20:20:34,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-12-18 20:20:34,895 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 20:20:35,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:20:35,231 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2023-12-18 20:20:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-18 20:20:35,232 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 20 [2023-12-18 20:20:35,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:20:35,233 INFO L225 Difference]: With dead ends: 55 [2023-12-18 20:20:35,233 INFO L226 Difference]: Without dead ends: 51 [2023-12-18 20:20:35,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2023-12-18 20:20:35,234 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 86 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 20:20:35,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 23 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 20:20:35,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-18 20:20:35,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2023-12-18 20:20:35,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 43 states have internal predecessors, (58), 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 20:20:35,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2023-12-18 20:20:35,242 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 20 [2023-12-18 20:20:35,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:20:35,242 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2023-12-18 20:20:35,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 20:20:35,243 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2023-12-18 20:20:35,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-18 20:20:35,243 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:20:35,243 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:20:35,252 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 20:20:35,444 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 20:20:35,444 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:20:35,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:20:35,445 INFO L85 PathProgramCache]: Analyzing trace with hash 649536643, now seen corresponding path program 2 times [2023-12-18 20:20:35,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:20:35,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615488838] [2023-12-18 20:20:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:35,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:20:35,459 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:20:35,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357301868] [2023-12-18 20:20:35,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 20:20:35,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:20:35,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:20:35,462 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 20:20:35,480 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 20:20:35,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 20:20:35,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:20:35,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 20:20:35,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:20:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 20:20:35,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:20:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 20:20:35,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:20:35,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615488838] [2023-12-18 20:20:35,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:20:35,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357301868] [2023-12-18 20:20:35,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357301868] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:20:35,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:20:35,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-12-18 20:20:35,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912879013] [2023-12-18 20:20:35,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:20:35,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 20:20:35,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:20:35,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 20:20:35,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-12-18 20:20:35,584 INFO L87 Difference]: Start difference. First operand 44 states and 58 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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 20:20:35,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:20:35,782 INFO L93 Difference]: Finished difference Result 126 states and 176 transitions. [2023-12-18 20:20:35,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-18 20:20:35,782 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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 21 [2023-12-18 20:20:35,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:20:35,783 INFO L225 Difference]: With dead ends: 126 [2023-12-18 20:20:35,783 INFO L226 Difference]: Without dead ends: 89 [2023-12-18 20:20:35,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2023-12-18 20:20:35,784 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 78 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:20:35,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 30 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:20:35,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-18 20:20:35,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2023-12-18 20:20:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 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 20:20:35,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2023-12-18 20:20:35,796 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 21 [2023-12-18 20:20:35,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:20:35,796 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2023-12-18 20:20:35,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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 20:20:35,796 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2023-12-18 20:20:35,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-18 20:20:35,797 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:20:35,797 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:20:35,804 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 20:20:35,998 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 20:20:35,998 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:20:35,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:20:35,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1888237686, now seen corresponding path program 3 times [2023-12-18 20:20:35,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:20:35,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443270635] [2023-12-18 20:20:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:35,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:20:36,015 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:20:36,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566349399] [2023-12-18 20:20:36,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 20:20:36,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:20:36,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:20:36,021 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 20:20:36,024 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 20:20:36,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-18 20:20:36,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:20:36,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 20:20:36,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:20:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 20:20:36,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:20:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 20:20:36,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:20:36,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443270635] [2023-12-18 20:20:36,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:20:36,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566349399] [2023-12-18 20:20:36,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566349399] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:20:36,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:20:36,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-18 20:20:36,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786310273] [2023-12-18 20:20:36,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:20:36,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 20:20:36,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:20:36,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 20:20:36,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-18 20:20:36,164 INFO L87 Difference]: Start difference. First operand 57 states and 72 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:20:36,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:20:36,255 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2023-12-18 20:20:36,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 20:20:36,255 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-18 20:20:36,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:20:36,257 INFO L225 Difference]: With dead ends: 100 [2023-12-18 20:20:36,257 INFO L226 Difference]: Without dead ends: 86 [2023-12-18 20:20:36,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 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 20:20:36,259 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:20:36,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 39 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:20:36,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-18 20:20:36,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 55. [2023-12-18 20:20:36,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 54 states have internal predecessors, (69), 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 20:20:36,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2023-12-18 20:20:36,282 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 24 [2023-12-18 20:20:36,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:20:36,283 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2023-12-18 20:20:36,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:20:36,283 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2023-12-18 20:20:36,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 20:20:36,287 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:20:36,287 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:20:36,299 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 20:20:36,493 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 20:20:36,493 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:20:36,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:20:36,494 INFO L85 PathProgramCache]: Analyzing trace with hash 698676081, now seen corresponding path program 1 times [2023-12-18 20:20:36,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:20:36,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623819332] [2023-12-18 20:20:36,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:36,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:20:36,502 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:20:36,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436996449] [2023-12-18 20:20:36,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:36,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:20:36,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:20:36,504 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 20:20:36,521 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 20:20:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:20:36,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 20:20:36,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:20:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 20:20:36,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:20:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 20:20:36,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:20:36,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623819332] [2023-12-18 20:20:36,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:20:36,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436996449] [2023-12-18 20:20:36,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436996449] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:20:36,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:20:36,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-12-18 20:20:36,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163674423] [2023-12-18 20:20:36,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:20:36,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 20:20:36,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:20:36,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 20:20:36,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-12-18 20:20:36,649 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:20:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:20:36,815 INFO L93 Difference]: Finished difference Result 140 states and 178 transitions. [2023-12-18 20:20:36,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 20:20:36,815 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-18 20:20:36,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:20:36,816 INFO L225 Difference]: With dead ends: 140 [2023-12-18 20:20:36,816 INFO L226 Difference]: Without dead ends: 88 [2023-12-18 20:20:36,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-12-18 20:20:36,817 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 76 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:20:36,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 25 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:20:36,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-18 20:20:36,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2023-12-18 20:20:36,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.25) internal successors, (85), 68 states have internal predecessors, (85), 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 20:20:36,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2023-12-18 20:20:36,827 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 26 [2023-12-18 20:20:36,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:20:36,827 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2023-12-18 20:20:36,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:20:36,827 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2023-12-18 20:20:36,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-18 20:20:36,828 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:20:36,828 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, 1, 1] [2023-12-18 20:20:36,836 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 20:20:37,033 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 20:20:37,034 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:20:37,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:20:37,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1454426822, now seen corresponding path program 1 times [2023-12-18 20:20:37,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:20:37,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583419778] [2023-12-18 20:20:37,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:37,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:20:37,042 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:20:37,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145261795] [2023-12-18 20:20:37,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:37,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:20:37,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:20:37,044 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 20:20:37,059 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 20:20:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:20:37,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 20:20:37,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:20:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 20:20:37,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:20:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 20:20:37,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:20:37,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583419778] [2023-12-18 20:20:37,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:20:37,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145261795] [2023-12-18 20:20:37,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145261795] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:20:37,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:20:37,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-18 20:20:37,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429801910] [2023-12-18 20:20:37,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:20:37,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 20:20:37,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:20:37,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 20:20:37,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-18 20:20:37,194 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 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 20:20:37,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:20:37,295 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2023-12-18 20:20:37,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-18 20:20:37,295 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 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 30 [2023-12-18 20:20:37,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:20:37,297 INFO L225 Difference]: With dead ends: 81 [2023-12-18 20:20:37,297 INFO L226 Difference]: Without dead ends: 69 [2023-12-18 20:20:37,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-12-18 20:20:37,299 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 49 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:20:37,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 26 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:20:37,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-18 20:20:37,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2023-12-18 20:20:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 states have internal predecessors, (57), 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 20:20:37,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2023-12-18 20:20:37,313 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 30 [2023-12-18 20:20:37,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:20:37,313 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2023-12-18 20:20:37,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 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 20:20:37,314 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2023-12-18 20:20:37,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-18 20:20:37,316 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:20:37,316 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, 1, 1] [2023-12-18 20:20:37,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-18 20:20:37,523 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 20:20:37,524 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:20:37,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:20:37,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1119124412, now seen corresponding path program 2 times [2023-12-18 20:20:37,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:20:37,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302295581] [2023-12-18 20:20:37,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:37,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:20:37,534 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:20:37,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94315515] [2023-12-18 20:20:37,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 20:20:37,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:20:37,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:20:37,535 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 20:20:37,564 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 20:20:37,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 20:20:37,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:20:37,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-18 20:20:37,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:20:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-18 20:20:37,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:20:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-18 20:20:37,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:20:37,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302295581] [2023-12-18 20:20:37,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:20:37,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94315515] [2023-12-18 20:20:37,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94315515] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:20:37,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:20:37,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-12-18 20:20:37,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904853505] [2023-12-18 20:20:37,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:20:37,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-18 20:20:37,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:20:37,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-18 20:20:37,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-12-18 20:20:37,684 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 20:20:37,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:20:37,793 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2023-12-18 20:20:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 20:20:37,793 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 39 [2023-12-18 20:20:37,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:20:37,794 INFO L225 Difference]: With dead ends: 129 [2023-12-18 20:20:37,794 INFO L226 Difference]: Without dead ends: 88 [2023-12-18 20:20:37,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2023-12-18 20:20:37,795 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:20:37,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 29 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:20:37,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-18 20:20:37,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2023-12-18 20:20:37,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 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 20:20:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2023-12-18 20:20:37,804 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 39 [2023-12-18 20:20:37,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:20:37,804 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2023-12-18 20:20:37,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 20:20:37,804 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2023-12-18 20:20:37,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 20:20:37,805 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:20:37,805 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:20:37,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-18 20:20:38,010 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 20:20:38,010 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:20:38,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:20:38,011 INFO L85 PathProgramCache]: Analyzing trace with hash -99082245, now seen corresponding path program 3 times [2023-12-18 20:20:38,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:20:38,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532586688] [2023-12-18 20:20:38,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:38,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:20:38,020 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:20:38,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396727986] [2023-12-18 20:20:38,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 20:20:38,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:20:38,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:20:38,021 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 20:20:38,041 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 20:20:38,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-18 20:20:38,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:20:38,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 20:20:38,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:20:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-18 20:20:38,106 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 20:20:38,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:20:38,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532586688] [2023-12-18 20:20:38,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:20:38,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396727986] [2023-12-18 20:20:38,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396727986] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 20:20:38,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 20:20:38,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-18 20:20:38,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431955177] [2023-12-18 20:20:38,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 20:20:38,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-18 20:20:38,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:20:38,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-18 20:20:38,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 20:20:38,108 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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 20:20:38,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:20:38,156 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2023-12-18 20:20:38,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 20:20:38,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) Word has length 40 [2023-12-18 20:20:38,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:20:38,157 INFO L225 Difference]: With dead ends: 81 [2023-12-18 20:20:38,157 INFO L226 Difference]: Without dead ends: 65 [2023-12-18 20:20:38,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-18 20:20:38,158 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:20:38,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:20:38,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-18 20:20:38,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2023-12-18 20:20:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 states have internal predecessors, (67), 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 20:20:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2023-12-18 20:20:38,165 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 40 [2023-12-18 20:20:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:20:38,165 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2023-12-18 20:20:38,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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 20:20:38,166 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2023-12-18 20:20:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 20:20:38,166 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:20:38,166 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:20:38,175 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 20:20:38,371 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 20:20:38,372 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:20:38,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:20:38,372 INFO L85 PathProgramCache]: Analyzing trace with hash -916730695, now seen corresponding path program 4 times [2023-12-18 20:20:38,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:20:38,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101494427] [2023-12-18 20:20:38,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:20:38,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:20:38,381 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:20:38,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642866956] [2023-12-18 20:20:38,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 20:20:38,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:20:38,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:20:38,383 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 20:20:38,386 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 20:20:38,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 20:20:38,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:20:38,497 WARN L260 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 74 conjunts are in the unsatisfiable core [2023-12-18 20:20:38,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:20:38,586 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 20:20:38,680 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 22 [2023-12-18 20:20:38,849 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:20:38,849 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 32 treesize of output 34 [2023-12-18 20:20:38,976 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:20:38,976 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 41 treesize of output 46 [2023-12-18 20:20:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:20:39,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:20:43,137 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 255 treesize of output 247 [2023-12-18 20:20:43,424 INFO L349 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2023-12-18 20:20:43,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 15360260082 treesize of output 14722725874 [2023-12-18 20:20:59,243 WARN L293 SmtUtils]: Spent 15.80s on a formula simplification. DAG size of input: 5616 DAG size of output: 616 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-18 20:21:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:21:03,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:21:03,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101494427] [2023-12-18 20:21:03,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:21:03,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642866956] [2023-12-18 20:21:03,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642866956] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:21:03,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:21:03,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 47 [2023-12-18 20:21:03,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120693862] [2023-12-18 20:21:03,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:21:03,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-18 20:21:03,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:21:03,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-18 20:21:03,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2023-12-18 20:21:03,175 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 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 20:21:42,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:21:42,948 INFO L93 Difference]: Finished difference Result 242 states and 296 transitions. [2023-12-18 20:21:42,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-12-18 20:21:42,949 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 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 40 [2023-12-18 20:21:42,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:21:42,950 INFO L225 Difference]: With dead ends: 242 [2023-12-18 20:21:42,950 INFO L226 Difference]: Without dead ends: 197 [2023-12-18 20:21:42,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5009 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=2075, Invalid=14181, Unknown=0, NotChecked=0, Total=16256 [2023-12-18 20:21:42,956 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 483 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-12-18 20:21:42,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 46 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 1685 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-12-18 20:21:42,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-12-18 20:21:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2023-12-18 20:21:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.2243589743589745) internal successors, (191), 156 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 20:21:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 191 transitions. [2023-12-18 20:21:42,993 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 191 transitions. Word has length 40 [2023-12-18 20:21:42,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:21:42,993 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 191 transitions. [2023-12-18 20:21:42,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 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 20:21:42,993 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 191 transitions. [2023-12-18 20:21:42,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-18 20:21:42,994 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:21:42,994 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:21:43,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-18 20:21:43,194 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 20:21:43,194 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:21:43,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:21:43,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1263444104, now seen corresponding path program 5 times [2023-12-18 20:21:43,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:21:43,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658431710] [2023-12-18 20:21:43,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:21:43,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:21:43,202 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:21:43,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218213533] [2023-12-18 20:21:43,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 20:21:43,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:21:43,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:21:43,203 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 20:21:43,208 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 20:21:43,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-18 20:21:43,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:21:43,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 20:21:43,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:21:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 33 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 20:21:43,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:21:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 20:21:43,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:21:43,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658431710] [2023-12-18 20:21:43,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:21:43,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218213533] [2023-12-18 20:21:43,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218213533] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:21:43,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:21:43,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2023-12-18 20:21:43,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065617319] [2023-12-18 20:21:43,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:21:43,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-18 20:21:43,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:21:43,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-18 20:21:43,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2023-12-18 20:21:43,607 INFO L87 Difference]: Start difference. First operand 157 states and 191 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 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 20:21:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:21:44,123 INFO L93 Difference]: Finished difference Result 259 states and 316 transitions. [2023-12-18 20:21:44,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-18 20:21:44,123 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 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 20:21:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:21:44,124 INFO L225 Difference]: With dead ends: 259 [2023-12-18 20:21:44,124 INFO L226 Difference]: Without dead ends: 148 [2023-12-18 20:21:44,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=708, Invalid=2154, Unknown=0, NotChecked=0, Total=2862 [2023-12-18 20:21:44,126 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 144 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 20:21:44,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 50 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 20:21:44,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-12-18 20:21:44,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 125. [2023-12-18 20:21:44,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1774193548387097) internal successors, (146), 124 states have internal predecessors, (146), 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 20:21:44,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2023-12-18 20:21:44,152 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 41 [2023-12-18 20:21:44,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:21:44,153 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2023-12-18 20:21:44,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 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 20:21:44,153 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2023-12-18 20:21:44,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-18 20:21:44,153 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:21:44,153 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:21:44,160 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 20:21:44,360 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 20:21:44,360 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:21:44,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:21:44,361 INFO L85 PathProgramCache]: Analyzing trace with hash -989874241, now seen corresponding path program 6 times [2023-12-18 20:21:44,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:21:44,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217870173] [2023-12-18 20:21:44,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:21:44,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:21:44,380 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:21:44,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745611264] [2023-12-18 20:21:44,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 20:21:44,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:21:44,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:21:44,381 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 20:21:44,401 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 20:21:44,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-18 20:21:44,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:21:44,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 20:21:44,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:21:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-18 20:21:44,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:21:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-18 20:21:44,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:21:44,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217870173] [2023-12-18 20:21:44,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:21:44,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745611264] [2023-12-18 20:21:44,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745611264] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:21:44,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:21:44,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-12-18 20:21:44,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802928129] [2023-12-18 20:21:44,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:21:44,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-18 20:21:44,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:21:44,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-18 20:21:44,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-12-18 20:21:44,597 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:21:44,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:21:44,940 INFO L93 Difference]: Finished difference Result 215 states and 256 transitions. [2023-12-18 20:21:44,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-18 20:21:44,941 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-12-18 20:21:44,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:21:44,942 INFO L225 Difference]: With dead ends: 215 [2023-12-18 20:21:44,942 INFO L226 Difference]: Without dead ends: 182 [2023-12-18 20:21:44,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2023-12-18 20:21:44,943 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 77 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:21:44,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 30 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:21:44,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-12-18 20:21:44,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 97. [2023-12-18 20:21:44,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.15625) internal successors, (111), 96 states have internal predecessors, (111), 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 20:21:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 111 transitions. [2023-12-18 20:21:44,962 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 111 transitions. Word has length 45 [2023-12-18 20:21:44,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:21:44,962 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 111 transitions. [2023-12-18 20:21:44,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:21:44,962 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 111 transitions. [2023-12-18 20:21:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-18 20:21:44,962 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:21:44,962 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:21:44,966 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 20:21:45,164 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 20:21:45,164 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:21:45,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:21:45,165 INFO L85 PathProgramCache]: Analyzing trace with hash -322294425, now seen corresponding path program 7 times [2023-12-18 20:21:45,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:21:45,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515915655] [2023-12-18 20:21:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:21:45,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:21:45,172 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:21:45,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638468034] [2023-12-18 20:21:45,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 20:21:45,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:21:45,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:21:45,173 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 20:21:45,176 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 20:21:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:21:45,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-18 20:21:45,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:21:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 73 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-18 20:21:45,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:21:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 53 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-18 20:21:45,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:21:45,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515915655] [2023-12-18 20:21:45,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:21:45,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638468034] [2023-12-18 20:21:45,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638468034] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:21:45,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:21:45,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-12-18 20:21:45,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436105948] [2023-12-18 20:21:45,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:21:45,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-18 20:21:45,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:21:45,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-18 20:21:45,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-12-18 20:21:45,313 INFO L87 Difference]: Start difference. First operand 97 states and 111 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 20:21:45,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:21:45,421 INFO L93 Difference]: Finished difference Result 180 states and 208 transitions. [2023-12-18 20:21:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 20:21:45,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 53 [2023-12-18 20:21:45,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:21:45,425 INFO L225 Difference]: With dead ends: 180 [2023-12-18 20:21:45,425 INFO L226 Difference]: Without dead ends: 107 [2023-12-18 20:21:45,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2023-12-18 20:21:45,426 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:21:45,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 25 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:21:45,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-12-18 20:21:45,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2023-12-18 20:21:45,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1263157894736842) internal successors, (107), 95 states have internal predecessors, (107), 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 20:21:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2023-12-18 20:21:45,442 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 53 [2023-12-18 20:21:45,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:21:45,442 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2023-12-18 20:21:45,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 20:21:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2023-12-18 20:21:45,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-18 20:21:45,442 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:21:45,443 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:21:45,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-18 20:21:45,648 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 20:21:45,648 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:21:45,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:21:45,649 INFO L85 PathProgramCache]: Analyzing trace with hash 160269504, now seen corresponding path program 8 times [2023-12-18 20:21:45,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:21:45,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915525360] [2023-12-18 20:21:45,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:21:45,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:21:45,657 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:21:45,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721548893] [2023-12-18 20:21:45,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 20:21:45,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:21:45,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:21:45,659 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 20:21:45,664 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 20:21:45,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 20:21:45,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:21:45,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 20:21:45,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:21:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 44 proven. 59 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-18 20:21:45,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:21:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 13 proven. 90 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-18 20:21:45,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:21:45,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915525360] [2023-12-18 20:21:45,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:21:45,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721548893] [2023-12-18 20:21:45,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721548893] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:21:45,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:21:45,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-18 20:21:45,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823435296] [2023-12-18 20:21:45,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:21:45,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-18 20:21:45,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:21:45,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-18 20:21:45,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-18 20:21:45,859 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 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 20:21:46,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:21:46,000 INFO L93 Difference]: Finished difference Result 143 states and 164 transitions. [2023-12-18 20:21:46,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 20:21:46,001 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 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) Word has length 57 [2023-12-18 20:21:46,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:21:46,001 INFO L225 Difference]: With dead ends: 143 [2023-12-18 20:21:46,001 INFO L226 Difference]: Without dead ends: 102 [2023-12-18 20:21:46,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 98 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 20:21:46,002 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:21:46,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 38 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:21:46,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-18 20:21:46,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 83. [2023-12-18 20:21:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 82 states have internal predecessors, (92), 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 20:21:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2023-12-18 20:21:46,019 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 57 [2023-12-18 20:21:46,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:21:46,019 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2023-12-18 20:21:46,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 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 20:21:46,019 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2023-12-18 20:21:46,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-18 20:21:46,020 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:21:46,020 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:21:46,026 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 20:21:46,225 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 20:21:46,225 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:21:46,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:21:46,225 INFO L85 PathProgramCache]: Analyzing trace with hash 530319014, now seen corresponding path program 9 times [2023-12-18 20:21:46,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:21:46,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295010913] [2023-12-18 20:21:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:21:46,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:21:46,234 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:21:46,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863790046] [2023-12-18 20:21:46,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 20:21:46,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:21:46,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:21:46,235 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 20:21:46,239 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 20:21:46,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-18 20:21:46,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:21:46,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 20:21:46,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:21:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 73 proven. 5 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2023-12-18 20:21:46,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:21:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 73 proven. 5 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2023-12-18 20:21:46,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:21:46,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295010913] [2023-12-18 20:21:46,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:21:46,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863790046] [2023-12-18 20:21:46,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863790046] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:21:46,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:21:46,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2023-12-18 20:21:46,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624513346] [2023-12-18 20:21:46,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:21:46,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-18 20:21:46,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:21:46,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-18 20:21:46,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 20:21:46,396 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:21:46,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:21:46,440 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2023-12-18 20:21:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 20:21:46,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-12-18 20:21:46,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:21:46,441 INFO L225 Difference]: With dead ends: 109 [2023-12-18 20:21:46,441 INFO L226 Difference]: Without dead ends: 83 [2023-12-18 20:21:46,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-18 20:21:46,442 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:21:46,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 19 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:21:46,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-18 20:21:46,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2023-12-18 20:21:46,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1125) internal successors, (89), 80 states have internal predecessors, (89), 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 20:21:46,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2023-12-18 20:21:46,462 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 68 [2023-12-18 20:21:46,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:21:46,462 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2023-12-18 20:21:46,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:21:46,462 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2023-12-18 20:21:46,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-18 20:21:46,462 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:21:46,463 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:21:46,470 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 20:21:46,663 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 20:21:46,663 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:21:46,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:21:46,663 INFO L85 PathProgramCache]: Analyzing trace with hash -403403905, now seen corresponding path program 10 times [2023-12-18 20:21:46,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:21:46,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604011003] [2023-12-18 20:21:46,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:21:46,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:21:46,675 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:21:46,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418512803] [2023-12-18 20:21:46,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 20:21:46,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:21:46,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:21:46,677 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 20:21:46,681 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 20:21:47,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 20:21:47,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:21:47,094 WARN L260 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 142 conjunts are in the unsatisfiable core [2023-12-18 20:21:47,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:21:47,161 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 20:21:47,249 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 22 [2023-12-18 20:21:47,373 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:47,373 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 32 treesize of output 36 [2023-12-18 20:21:47,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:47,610 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 43 treesize of output 48 [2023-12-18 20:21:47,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:47,739 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 52 treesize of output 60 [2023-12-18 20:21:47,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:47,885 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 61 treesize of output 74 [2023-12-18 20:21:48,147 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:48,147 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 72 treesize of output 86 [2023-12-18 20:21:48,302 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:48,302 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 81 treesize of output 98 [2023-12-18 20:21:48,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:48,497 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 90 treesize of output 110 [2023-12-18 20:21:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:21:50,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:21:58,471 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 527 treesize of output 515