/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-fpi/s22if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 21:28:39,326 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 21:28:39,383 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 21:28:39,387 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 21:28:39,388 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 21:28:39,412 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 21:28:39,412 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 21:28:39,413 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 21:28:39,413 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 21:28:39,416 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 21:28:39,416 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 21:28:39,416 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 21:28:39,417 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 21:28:39,418 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 21:28:39,418 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 21:28:39,418 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 21:28:39,418 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 21:28:39,418 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 21:28:39,418 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 21:28:39,419 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 21:28:39,419 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 21:28:39,420 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 21:28:39,420 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 21:28:39,420 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 21:28:39,420 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 21:28:39,420 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 21:28:39,420 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 21:28:39,420 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 21:28:39,421 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 21:28:39,421 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 21:28:39,422 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 21:28:39,422 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 21:28:39,422 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 21:28:39,422 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 21:28:39,422 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 21:28:39,422 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 21:28:39,422 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 21:28:39,422 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 21:28:39,422 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 21:28:39,423 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 21:28:39,423 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 21:28:39,423 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 21:28:39,423 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 21:28:39,423 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 21:28:39,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 21:28:39,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 21:28:39,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 21:28:39,642 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 21:28:39,642 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 21:28:39,643 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s22if.c [2023-12-18 21:28:40,707 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 21:28:40,842 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 21:28:40,842 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s22if.c [2023-12-18 21:28:40,847 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b066df18d/5534bb7e87ae4a499578f6346f3911ce/FLAG0ae0f0375 [2023-12-18 21:28:40,863 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b066df18d/5534bb7e87ae4a499578f6346f3911ce [2023-12-18 21:28:40,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 21:28:40,866 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 21:28:40,869 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 21:28:40,869 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 21:28:40,873 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 21:28:40,873 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:28:40" (1/1) ... [2023-12-18 21:28:40,874 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18b7cd51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:28:40, skipping insertion in model container [2023-12-18 21:28:40,874 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:28:40" (1/1) ... [2023-12-18 21:28:40,892 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 21:28:40,993 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-fpi/s22if.c[588,601] [2023-12-18 21:28:41,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 21:28:41,029 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 21:28:41,039 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-fpi/s22if.c[588,601] [2023-12-18 21:28:41,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 21:28:41,055 INFO L206 MainTranslator]: Completed translation [2023-12-18 21:28:41,055 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:28:41 WrapperNode [2023-12-18 21:28:41,056 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 21:28:41,061 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 21:28:41,061 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 21:28:41,061 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 21:28:41,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:28:41" (1/1) ... [2023-12-18 21:28:41,071 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:28:41" (1/1) ... [2023-12-18 21:28:41,098 INFO L138 Inliner]: procedures = 17, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2023-12-18 21:28:41,099 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 21:28:41,099 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 21:28:41,099 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 21:28:41,099 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 21:28:41,109 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:28:41" (1/1) ... [2023-12-18 21:28:41,109 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:28:41" (1/1) ... [2023-12-18 21:28:41,111 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:28:41" (1/1) ... [2023-12-18 21:28:41,123 INFO L175 MemorySlicer]: Split 25 memory accesses to 4 slices as follows [2, 8, 9, 6]. 36 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 6 writes are split as follows [0, 0, 3, 3]. [2023-12-18 21:28:41,123 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:28:41" (1/1) ... [2023-12-18 21:28:41,123 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:28:41" (1/1) ... [2023-12-18 21:28:41,127 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:28:41" (1/1) ... [2023-12-18 21:28:41,129 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:28:41" (1/1) ... [2023-12-18 21:28:41,130 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:28:41" (1/1) ... [2023-12-18 21:28:41,130 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:28:41" (1/1) ... [2023-12-18 21:28:41,132 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 21:28:41,133 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 21:28:41,133 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 21:28:41,133 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 21:28:41,133 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:28:41" (1/1) ... [2023-12-18 21:28:41,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 21:28:41,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:28:41,170 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 21:28:41,181 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 21:28:41,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 21:28:41,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 21:28:41,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 21:28:41,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 21:28:41,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-18 21:28:41,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 21:28:41,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 21:28:41,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 21:28:41,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 21:28:41,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-18 21:28:41,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-18 21:28:41,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 21:28:41,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 21:28:41,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 21:28:41,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 21:28:41,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 21:28:41,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-18 21:28:41,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 21:28:41,286 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 21:28:41,290 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 21:28:41,468 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 21:28:41,492 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 21:28:41,492 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-18 21:28:41,492 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:28:41 BoogieIcfgContainer [2023-12-18 21:28:41,493 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 21:28:41,507 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 21:28:41,507 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 21:28:41,530 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 21:28:41,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:28:40" (1/3) ... [2023-12-18 21:28:41,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a4a3f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:28:41, skipping insertion in model container [2023-12-18 21:28:41,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:28:41" (2/3) ... [2023-12-18 21:28:41,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a4a3f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:28:41, skipping insertion in model container [2023-12-18 21:28:41,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:28:41" (3/3) ... [2023-12-18 21:28:41,532 INFO L112 eAbstractionObserver]: Analyzing ICFG s22if.c [2023-12-18 21:28:41,560 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 21:28:41,560 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 21:28:41,597 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 21:28:41,602 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;@7615f24e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 21:28:41,602 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 21:28:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 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 21:28:41,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-18 21:28:41,610 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:41,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:28:41,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:41,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:41,614 INFO L85 PathProgramCache]: Analyzing trace with hash 845365045, now seen corresponding path program 1 times [2023-12-18 21:28:41,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:41,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005789199] [2023-12-18 21:28:41,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:41,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:28:41,795 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 21:28:41,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:28:41,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005789199] [2023-12-18 21:28:41,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005789199] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:28:41,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:28:41,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 21:28:41,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593419716] [2023-12-18 21:28:41,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:28:41,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 21:28:41,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:28:41,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 21:28:41,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 21:28:41,839 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 21:28:41,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:28:41,867 INFO L93 Difference]: Finished difference Result 37 states and 55 transitions. [2023-12-18 21:28:41,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 21:28:41,870 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2023-12-18 21:28:41,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:28:41,875 INFO L225 Difference]: With dead ends: 37 [2023-12-18 21:28:41,875 INFO L226 Difference]: Without dead ends: 17 [2023-12-18 21:28:41,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 21:28:41,881 INFO L413 NwaCegarLoop]: 22 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, 22 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 21:28:41,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:28:41,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-18 21:28:41,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-18 21:28:41,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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 21:28:41,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-12-18 21:28:41,906 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2023-12-18 21:28:41,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:28:41,906 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-12-18 21:28:41,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 21:28:41,907 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-12-18 21:28:41,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-18 21:28:41,908 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:41,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:28:41,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 21:28:41,909 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:41,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:41,910 INFO L85 PathProgramCache]: Analyzing trace with hash 452010334, now seen corresponding path program 1 times [2023-12-18 21:28:41,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:41,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63889116] [2023-12-18 21:28:41,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:41,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:28:42,035 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 21:28:42,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:28:42,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63889116] [2023-12-18 21:28:42,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63889116] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:28:42,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:28:42,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 21:28:42,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695454009] [2023-12-18 21:28:42,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:28:42,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 21:28:42,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:28:42,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 21:28:42,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 21:28:42,045 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 21:28:42,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:28:42,105 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2023-12-18 21:28:42,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 21:28:42,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2023-12-18 21:28:42,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:28:42,108 INFO L225 Difference]: With dead ends: 36 [2023-12-18 21:28:42,108 INFO L226 Difference]: Without dead ends: 24 [2023-12-18 21:28:42,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 21:28:42,110 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:28:42,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 9 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:28:42,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-18 21:28:42,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2023-12-18 21:28:42,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:28:42,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-12-18 21:28:42,122 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2023-12-18 21:28:42,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:28:42,122 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-12-18 21:28:42,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 21:28:42,123 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-12-18 21:28:42,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-18 21:28:42,123 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:42,124 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 21:28:42,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 21:28:42,124 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:42,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:42,125 INFO L85 PathProgramCache]: Analyzing trace with hash 678183220, now seen corresponding path program 1 times [2023-12-18 21:28:42,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:42,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235180167] [2023-12-18 21:28:42,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:42,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:28:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:28:42,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:28:42,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235180167] [2023-12-18 21:28:42,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235180167] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:28:42,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589485035] [2023-12-18 21:28:42,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:42,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:42,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:28:42,548 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 21:28:42,584 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 21:28:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:28:42,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-18 21:28:42,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:28:42,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:28:42,755 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 19 treesize of output 11 [2023-12-18 21:28:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:28:42,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:28:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:28:42,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589485035] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:28:42,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:28:42,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2023-12-18 21:28:42,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602159353] [2023-12-18 21:28:42,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:28:42,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-18 21:28:42,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:28:42,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-18 21:28:42,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-12-18 21:28:42,915 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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 21:28:43,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:28:43,122 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2023-12-18 21:28:43,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 21:28:43,122 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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 21:28:43,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:28:43,123 INFO L225 Difference]: With dead ends: 47 [2023-12-18 21:28:43,123 INFO L226 Difference]: Without dead ends: 43 [2023-12-18 21:28:43,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2023-12-18 21:28:43,124 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 79 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:28:43,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 32 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:28:43,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-18 21:28:43,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2023-12-18 21:28:43,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 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 21:28:43,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2023-12-18 21:28:43,128 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 19 [2023-12-18 21:28:43,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:28:43,128 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-12-18 21:28:43,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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 21:28:43,128 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2023-12-18 21:28:43,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-18 21:28:43,129 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:43,129 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 21:28:43,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-18 21:28:43,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:43,334 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:43,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:43,335 INFO L85 PathProgramCache]: Analyzing trace with hash 735441522, now seen corresponding path program 1 times [2023-12-18 21:28:43,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:43,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034768595] [2023-12-18 21:28:43,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:43,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:43,351 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:28:43,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780488459] [2023-12-18 21:28:43,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:43,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:43,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:28:43,352 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 21:28:43,386 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 21:28:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:28:43,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-18 21:28:43,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:28:43,440 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 19 treesize of output 11 [2023-12-18 21:28:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:28:43,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:28:43,512 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 27 treesize of output 23 [2023-12-18 21:28:43,520 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 21:28:43,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2023-12-18 21:28:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:28:43,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:28:43,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034768595] [2023-12-18 21:28:43,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:28:43,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780488459] [2023-12-18 21:28:43,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780488459] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:28:43,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:28:43,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-12-18 21:28:43,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214986535] [2023-12-18 21:28:43,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:28:43,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-18 21:28:43,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:28:43,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-18 21:28:43,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-18 21:28:43,531 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 21:28:43,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:28:43,644 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2023-12-18 21:28:43,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-18 21:28:43,645 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 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 21:28:43,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:28:43,645 INFO L225 Difference]: With dead ends: 89 [2023-12-18 21:28:43,645 INFO L226 Difference]: Without dead ends: 77 [2023-12-18 21:28:43,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-12-18 21:28:43,646 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:28:43,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 62 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:28:43,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-18 21:28:43,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 44. [2023-12-18 21:28:43,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 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 21:28:43,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2023-12-18 21:28:43,660 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 19 [2023-12-18 21:28:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:28:43,660 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2023-12-18 21:28:43,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 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 21:28:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2023-12-18 21:28:43,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-18 21:28:43,661 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:43,661 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 21:28:43,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-18 21:28:43,861 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,SelfDestructingSolverStorable3 [2023-12-18 21:28:43,862 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:43,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:43,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1436506100, now seen corresponding path program 1 times [2023-12-18 21:28:43,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:43,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12456230] [2023-12-18 21:28:43,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:43,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:43,874 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:28:43,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704744151] [2023-12-18 21:28:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:43,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:43,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:28:43,875 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 21:28:43,878 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 21:28:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:28:43,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-18 21:28:43,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:28:43,935 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 21:28:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:28:43,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:28:43,974 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 14 treesize of output 12 [2023-12-18 21:28:43,975 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 14 treesize of output 12 [2023-12-18 21:28:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:28:43,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:28:43,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12456230] [2023-12-18 21:28:43,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:28:43,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704744151] [2023-12-18 21:28:43,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704744151] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:28:43,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:28:43,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-12-18 21:28:43,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462555236] [2023-12-18 21:28:43,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:28:43,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 21:28:43,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:28:43,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 21:28:43,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-18 21:28:43,983 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:28:44,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:28:44,041 INFO L93 Difference]: Finished difference Result 75 states and 99 transitions. [2023-12-18 21:28:44,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-18 21:28:44,041 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 21:28:44,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:28:44,042 INFO L225 Difference]: With dead ends: 75 [2023-12-18 21:28:44,042 INFO L226 Difference]: Without dead ends: 54 [2023-12-18 21:28:44,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-12-18 21:28:44,042 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:28:44,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 51 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:28:44,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-18 21:28:44,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2023-12-18 21:28:44,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 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 21:28:44,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2023-12-18 21:28:44,048 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 19 [2023-12-18 21:28:44,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:28:44,048 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2023-12-18 21:28:44,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 21:28:44,048 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2023-12-18 21:28:44,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-18 21:28:44,048 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:44,049 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:28:44,063 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 21:28:44,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:44,254 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:44,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:44,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1950697993, now seen corresponding path program 2 times [2023-12-18 21:28:44,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:44,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571979753] [2023-12-18 21:28:44,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:44,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:28:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:28:44,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:28:44,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571979753] [2023-12-18 21:28:44,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571979753] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:28:44,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340619105] [2023-12-18 21:28:44,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:28:44,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:44,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:28:44,311 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 21:28:44,335 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 21:28:44,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:28:44,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:28:44,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 21:28:44,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:28:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:28:44,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:28:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:28:44,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340619105] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:28:44,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:28:44,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-12-18 21:28:44,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139696429] [2023-12-18 21:28:44,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:28:44,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 21:28:44,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:28:44,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 21:28:44,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-18 21:28:44,455 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 21:28:44,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:28:44,573 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2023-12-18 21:28:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-18 21:28:44,573 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 21:28:44,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:28:44,575 INFO L225 Difference]: With dead ends: 82 [2023-12-18 21:28:44,575 INFO L226 Difference]: Without dead ends: 72 [2023-12-18 21:28:44,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-12-18 21:28:44,577 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:28:44,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 29 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:28:44,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-18 21:28:44,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2023-12-18 21:28:44,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 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 21:28:44,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2023-12-18 21:28:44,591 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 20 [2023-12-18 21:28:44,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:28:44,591 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2023-12-18 21:28:44,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 21:28:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2023-12-18 21:28:44,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-18 21:28:44,592 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:44,592 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:28:44,612 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 21:28:44,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:44,798 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:44,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:44,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1769185541, now seen corresponding path program 3 times [2023-12-18 21:28:44,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:44,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062959480] [2023-12-18 21:28:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:44,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:28:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:28:44,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:28:44,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062959480] [2023-12-18 21:28:44,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062959480] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:28:44,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555341477] [2023-12-18 21:28:44,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:28:44,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:44,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:28:44,886 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 21:28:44,933 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 21:28:44,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 21:28:44,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:28:44,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 21:28:44,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:28:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:28:45,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:28:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:28:45,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555341477] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:28:45,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:28:45,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-12-18 21:28:45,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228782655] [2023-12-18 21:28:45,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:28:45,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 21:28:45,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:28:45,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 21:28:45,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-18 21:28:45,038 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:28:45,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:28:45,120 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2023-12-18 21:28:45,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 21:28:45,121 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-18 21:28:45,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:28:45,123 INFO L225 Difference]: With dead ends: 74 [2023-12-18 21:28:45,123 INFO L226 Difference]: Without dead ends: 38 [2023-12-18 21:28:45,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-12-18 21:28:45,124 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:28:45,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 25 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:28:45,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-18 21:28:45,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2023-12-18 21:28:45,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 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 21:28:45,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-12-18 21:28:45,132 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2023-12-18 21:28:45,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:28:45,132 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-12-18 21:28:45,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:28:45,132 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-12-18 21:28:45,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 21:28:45,134 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:45,134 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:28:45,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-18 21:28:45,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:45,339 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:45,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:45,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1237862050, now seen corresponding path program 4 times [2023-12-18 21:28:45,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:45,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144788140] [2023-12-18 21:28:45,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:45,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:28:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 21:28:45,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:28:45,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144788140] [2023-12-18 21:28:45,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144788140] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:28:45,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53885971] [2023-12-18 21:28:45,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:28:45,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:45,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:28:45,694 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 21:28:45,696 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 21:28:45,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:28:45,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:28:45,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-18 21:28:45,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:28:45,766 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 21:28:45,912 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 19 treesize of output 11 [2023-12-18 21:28:45,987 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 19 treesize of output 11 [2023-12-18 21:28:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:28:46,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:28:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:28:46,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53885971] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:28:46,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:28:46,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 33 [2023-12-18 21:28:46,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976402174] [2023-12-18 21:28:46,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:28:46,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-18 21:28:46,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:28:46,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-18 21:28:46,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2023-12-18 21:28:46,347 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 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 21:28:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:28:47,112 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2023-12-18 21:28:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-18 21:28:47,112 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 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 21:28:47,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:28:47,112 INFO L225 Difference]: With dead ends: 89 [2023-12-18 21:28:47,112 INFO L226 Difference]: Without dead ends: 80 [2023-12-18 21:28:47,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=335, Invalid=2017, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 21:28:47,114 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 82 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 21:28:47,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 131 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 21:28:47,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-18 21:28:47,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2023-12-18 21:28:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 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 21:28:47,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2023-12-18 21:28:47,121 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 26 [2023-12-18 21:28:47,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:28:47,121 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2023-12-18 21:28:47,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 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 21:28:47,122 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2023-12-18 21:28:47,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 21:28:47,122 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:47,122 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:28:47,127 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 21:28:47,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:47,330 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:47,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:47,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1180603748, now seen corresponding path program 1 times [2023-12-18 21:28:47,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:47,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218308125] [2023-12-18 21:28:47,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:47,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:47,339 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:28:47,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897821385] [2023-12-18 21:28:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:47,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:47,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:28:47,341 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 21:28:47,364 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 21:28:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:28:47,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-18 21:28:47,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:28:47,433 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 19 treesize of output 11 [2023-12-18 21:28:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 21:28:47,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:28:47,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-12-18 21:28:47,527 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 21:28:47,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-12-18 21:28:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 21:28:47,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:28:47,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218308125] [2023-12-18 21:28:47,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:28:47,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897821385] [2023-12-18 21:28:47,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897821385] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:28:47,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:28:47,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-12-18 21:28:47,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020960990] [2023-12-18 21:28:47,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:28:47,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-18 21:28:47,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:28:47,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-18 21:28:47,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-12-18 21:28:47,546 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 21:28:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:28:47,708 INFO L93 Difference]: Finished difference Result 108 states and 135 transitions. [2023-12-18 21:28:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-18 21:28:47,709 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 26 [2023-12-18 21:28:47,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:28:47,709 INFO L225 Difference]: With dead ends: 108 [2023-12-18 21:28:47,709 INFO L226 Difference]: Without dead ends: 101 [2023-12-18 21:28:47,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-12-18 21:28:47,710 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:28:47,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 96 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:28:47,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-18 21:28:47,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2023-12-18 21:28:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 66 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:28:47,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2023-12-18 21:28:47,729 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 26 [2023-12-18 21:28:47,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:28:47,729 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2023-12-18 21:28:47,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 21:28:47,729 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2023-12-18 21:28:47,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 21:28:47,729 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:47,729 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 21:28:47,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-18 21:28:47,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:47,935 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:47,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:47,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2103246298, now seen corresponding path program 1 times [2023-12-18 21:28:47,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:47,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958849275] [2023-12-18 21:28:47,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:47,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:47,957 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:28:47,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711960591] [2023-12-18 21:28:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:47,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:47,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:28:47,958 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 21:28:47,961 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 21:28:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:28:48,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-18 21:28:48,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:28:48,030 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 21:28:48,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 21:28:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 21:28:48,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:28:48,102 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 16 treesize of output 14 [2023-12-18 21:28:48,109 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 16 treesize of output 12 [2023-12-18 21:28:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 21:28:48,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:28:48,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958849275] [2023-12-18 21:28:48,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:28:48,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711960591] [2023-12-18 21:28:48,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711960591] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:28:48,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:28:48,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-12-18 21:28:48,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977462097] [2023-12-18 21:28:48,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:28:48,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-18 21:28:48,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:28:48,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-18 21:28:48,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-12-18 21:28:48,125 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:28:48,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:28:48,244 INFO L93 Difference]: Finished difference Result 109 states and 139 transitions. [2023-12-18 21:28:48,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 21:28:48,245 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-18 21:28:48,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:28:48,246 INFO L225 Difference]: With dead ends: 109 [2023-12-18 21:28:48,246 INFO L226 Difference]: Without dead ends: 78 [2023-12-18 21:28:48,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-18 21:28:48,247 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:28:48,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 74 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:28:48,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-18 21:28:48,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2023-12-18 21:28:48,253 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 21:28:48,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2023-12-18 21:28:48,254 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 26 [2023-12-18 21:28:48,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:28:48,254 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2023-12-18 21:28:48,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:28:48,254 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2023-12-18 21:28:48,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-18 21:28:48,254 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:48,254 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:28:48,259 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 21:28:48,459 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,SelfDestructingSolverStorable9 [2023-12-18 21:28:48,459 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:48,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:48,460 INFO L85 PathProgramCache]: Analyzing trace with hash -939265221, now seen corresponding path program 5 times [2023-12-18 21:28:48,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:48,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210773542] [2023-12-18 21:28:48,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:48,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:28:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 21:28:48,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:28:48,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210773542] [2023-12-18 21:28:48,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210773542] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:28:48,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509439541] [2023-12-18 21:28:48,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:28:48,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:48,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:28:48,531 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 21:28:48,548 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 21:28:48,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-18 21:28:48,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:28:48,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 21:28:48,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:28:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 21:28:48,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:28:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 21:28:48,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509439541] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:28:48,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:28:48,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-18 21:28:48,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048118886] [2023-12-18 21:28:48,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:28:48,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-18 21:28:48,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:28:48,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-18 21:28:48,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-18 21:28:48,720 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:28:48,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:28:48,861 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2023-12-18 21:28:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 21:28:48,861 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-18 21:28:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:28:48,862 INFO L225 Difference]: With dead ends: 112 [2023-12-18 21:28:48,862 INFO L226 Difference]: Without dead ends: 97 [2023-12-18 21:28:48,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-12-18 21:28:48,862 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 61 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:28:48,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 21 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:28:48,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-18 21:28:48,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2023-12-18 21:28:48,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 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 21:28:48,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2023-12-18 21:28:48,869 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 27 [2023-12-18 21:28:48,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:28:48,869 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2023-12-18 21:28:48,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:28:48,869 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2023-12-18 21:28:48,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-18 21:28:48,870 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:48,870 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:28:48,875 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 21:28:49,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:49,075 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:49,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:49,075 INFO L85 PathProgramCache]: Analyzing trace with hash 979910811, now seen corresponding path program 6 times [2023-12-18 21:28:49,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:49,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914430055] [2023-12-18 21:28:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:49,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:28:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 21:28:49,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:28:49,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914430055] [2023-12-18 21:28:49,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914430055] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:28:49,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902566936] [2023-12-18 21:28:49,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:28:49,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:49,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:28:49,146 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 21:28:49,164 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 21:28:49,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-18 21:28:49,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:28:49,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 21:28:49,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:28:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 21:28:49,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:28:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 21:28:49,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902566936] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:28:49,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:28:49,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-18 21:28:49,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108881508] [2023-12-18 21:28:49,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:28:49,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-18 21:28:49,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:28:49,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-18 21:28:49,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-18 21:28:49,309 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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 21:28:49,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:28:49,412 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2023-12-18 21:28:49,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 21:28:49,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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 29 [2023-12-18 21:28:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:28:49,413 INFO L225 Difference]: With dead ends: 101 [2023-12-18 21:28:49,413 INFO L226 Difference]: Without dead ends: 48 [2023-12-18 21:28:49,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-12-18 21:28:49,413 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 65 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:28:49,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 21 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:28:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-18 21:28:49,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2023-12-18 21:28:49,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:28:49,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2023-12-18 21:28:49,418 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 29 [2023-12-18 21:28:49,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:28:49,418 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2023-12-18 21:28:49,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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 21:28:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2023-12-18 21:28:49,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-18 21:28:49,418 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:49,418 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:28:49,425 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 21:28:49,623 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,SelfDestructingSolverStorable11 [2023-12-18 21:28:49,623 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:49,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:49,624 INFO L85 PathProgramCache]: Analyzing trace with hash -2065802316, now seen corresponding path program 7 times [2023-12-18 21:28:49,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:49,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064270017] [2023-12-18 21:28:49,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:49,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:28:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:28:50,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:28:50,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064270017] [2023-12-18 21:28:50,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064270017] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:28:50,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183167845] [2023-12-18 21:28:50,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:28:50,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:50,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:28:50,102 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 21:28:50,127 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 21:28:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:28:50,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-18 21:28:50,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:28:50,199 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 21:28:50,272 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 19 treesize of output 11 [2023-12-18 21:28:50,365 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 19 treesize of output 11 [2023-12-18 21:28:50,459 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 19 treesize of output 11 [2023-12-18 21:28:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:28:50,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:28:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:28:50,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183167845] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:28:50,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:28:50,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 33 [2023-12-18 21:28:50,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938045065] [2023-12-18 21:28:50,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:28:50,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-18 21:28:50,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:28:50,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-18 21:28:50,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2023-12-18 21:28:50,788 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 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 21:28:51,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:28:51,778 INFO L93 Difference]: Finished difference Result 142 states and 169 transitions. [2023-12-18 21:28:51,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-18 21:28:51,779 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 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 33 [2023-12-18 21:28:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:28:51,779 INFO L225 Difference]: With dead ends: 142 [2023-12-18 21:28:51,779 INFO L226 Difference]: Without dead ends: 133 [2023-12-18 21:28:51,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=383, Invalid=3157, Unknown=0, NotChecked=0, Total=3540 [2023-12-18 21:28:51,781 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 79 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-18 21:28:51,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 203 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-18 21:28:51,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-12-18 21:28:51,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 92. [2023-12-18 21:28:51,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2747252747252746) internal successors, (116), 91 states have internal predecessors, (116), 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 21:28:51,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2023-12-18 21:28:51,792 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 33 [2023-12-18 21:28:51,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:28:51,792 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2023-12-18 21:28:51,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 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 21:28:51,792 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2023-12-18 21:28:51,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-18 21:28:51,792 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:51,792 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:28:51,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-18 21:28:51,997 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,SelfDestructingSolverStorable12 [2023-12-18 21:28:51,998 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:51,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:51,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2008544014, now seen corresponding path program 2 times [2023-12-18 21:28:51,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:51,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747707842] [2023-12-18 21:28:51,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:51,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:52,007 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:28:52,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347554257] [2023-12-18 21:28:52,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:28:52,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:52,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:28:52,008 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 21:28:52,010 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 21:28:52,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:28:52,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:28:52,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-18 21:28:52,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:28:52,133 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 19 treesize of output 11 [2023-12-18 21:28:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:28:52,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:28:52,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-12-18 21:28:52,306 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 21:28:52,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-12-18 21:28:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 21:28:52,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:28:52,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747707842] [2023-12-18 21:28:52,328 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:28:52,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347554257] [2023-12-18 21:28:52,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347554257] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:28:52,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:28:52,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-12-18 21:28:52,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431384813] [2023-12-18 21:28:52,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:28:52,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-18 21:28:52,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:28:52,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-18 21:28:52,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-12-18 21:28:52,329 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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 21:28:52,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:28:52,597 INFO L93 Difference]: Finished difference Result 139 states and 174 transitions. [2023-12-18 21:28:52,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-18 21:28:52,598 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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 33 [2023-12-18 21:28:52,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:28:52,599 INFO L225 Difference]: With dead ends: 139 [2023-12-18 21:28:52,599 INFO L226 Difference]: Without dead ends: 132 [2023-12-18 21:28:52,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-12-18 21:28:52,602 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 85 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:28:52,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 124 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:28:52,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-18 21:28:52,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 98. [2023-12-18 21:28:52,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.2577319587628866) internal successors, (122), 97 states have internal predecessors, (122), 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 21:28:52,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2023-12-18 21:28:52,620 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 33 [2023-12-18 21:28:52,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:28:52,620 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2023-12-18 21:28:52,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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 21:28:52,620 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2023-12-18 21:28:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-18 21:28:52,620 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:52,620 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:28:52,625 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 21:28:52,825 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,SelfDestructingSolverStorable13 [2023-12-18 21:28:52,826 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:52,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:52,826 INFO L85 PathProgramCache]: Analyzing trace with hash 698075380, now seen corresponding path program 2 times [2023-12-18 21:28:52,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:52,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89812098] [2023-12-18 21:28:52,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:52,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:52,835 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:28:52,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531689530] [2023-12-18 21:28:52,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:28:52,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:52,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:28:52,837 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 21:28:52,856 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 21:28:52,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:28:52,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:28:52,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-18 21:28:52,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:28:52,954 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 21:28:52,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 21:28:53,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 21:28:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:28:53,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:28:53,067 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 16 treesize of output 14 [2023-12-18 21:28:53,080 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 16 treesize of output 12 [2023-12-18 21:28:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:28:53,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:28:53,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89812098] [2023-12-18 21:28:53,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:28:53,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531689530] [2023-12-18 21:28:53,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531689530] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:28:53,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:28:53,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-12-18 21:28:53,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056268619] [2023-12-18 21:28:53,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:28:53,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 21:28:53,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:28:53,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 21:28:53,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-12-18 21:28:53,105 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 21:28:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:28:53,271 INFO L93 Difference]: Finished difference Result 158 states and 204 transitions. [2023-12-18 21:28:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-18 21:28:53,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 33 [2023-12-18 21:28:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:28:53,272 INFO L225 Difference]: With dead ends: 158 [2023-12-18 21:28:53,272 INFO L226 Difference]: Without dead ends: 109 [2023-12-18 21:28:53,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-12-18 21:28:53,273 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:28:53,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 84 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:28:53,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-18 21:28:53,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2023-12-18 21:28:53,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2525252525252526) internal successors, (124), 99 states have internal predecessors, (124), 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 21:28:53,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2023-12-18 21:28:53,287 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 33 [2023-12-18 21:28:53,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:28:53,287 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2023-12-18 21:28:53,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 21:28:53,287 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2023-12-18 21:28:53,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-18 21:28:53,289 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:53,289 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:28:53,298 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 21:28:53,494 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,SelfDestructingSolverStorable14 [2023-12-18 21:28:53,494 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:53,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:53,494 INFO L85 PathProgramCache]: Analyzing trace with hash -437010633, now seen corresponding path program 8 times [2023-12-18 21:28:53,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:53,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976911630] [2023-12-18 21:28:53,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:53,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:28:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:28:53,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:28:53,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976911630] [2023-12-18 21:28:53,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976911630] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:28:53,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839276496] [2023-12-18 21:28:53,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:28:53,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:53,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:28:53,615 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 21:28:53,640 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 21:28:53,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:28:53,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:28:53,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 21:28:53,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:28:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:28:53,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:28:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:28:53,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839276496] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:28:53,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:28:53,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-18 21:28:53,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035966547] [2023-12-18 21:28:53,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:28:53,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 21:28:53,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:28:53,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 21:28:53,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-18 21:28:53,835 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 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 21:28:54,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:28:54,061 INFO L93 Difference]: Finished difference Result 149 states and 183 transitions. [2023-12-18 21:28:54,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-18 21:28:54,062 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 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 34 [2023-12-18 21:28:54,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:28:54,062 INFO L225 Difference]: With dead ends: 149 [2023-12-18 21:28:54,063 INFO L226 Difference]: Without dead ends: 131 [2023-12-18 21:28:54,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-12-18 21:28:54,063 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 100 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:28:54,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 27 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:28:54,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-12-18 21:28:54,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 91. [2023-12-18 21:28:54,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 90 states have internal predecessors, (113), 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 21:28:54,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2023-12-18 21:28:54,075 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 34 [2023-12-18 21:28:54,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:28:54,075 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2023-12-18 21:28:54,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 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 21:28:54,075 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2023-12-18 21:28:54,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-18 21:28:54,075 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:54,075 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:28:54,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-18 21:28:54,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:54,280 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:54,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:54,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1808627333, now seen corresponding path program 9 times [2023-12-18 21:28:54,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:54,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45786879] [2023-12-18 21:28:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:54,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:28:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:28:54,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:28:54,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45786879] [2023-12-18 21:28:54,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45786879] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:28:54,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701454518] [2023-12-18 21:28:54,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:28:54,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:54,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:28:54,384 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 21:28:54,411 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 21:28:54,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-18 21:28:54,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:28:54,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 21:28:54,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:28:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:28:54,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:28:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:28:54,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701454518] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:28:54,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:28:54,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-18 21:28:54,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042347875] [2023-12-18 21:28:54,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:28:54,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 21:28:54,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:28:54,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 21:28:54,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-18 21:28:54,627 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:28:54,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:28:54,767 INFO L93 Difference]: Finished difference Result 133 states and 161 transitions. [2023-12-18 21:28:54,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 21:28:54,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-18 21:28:54,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:28:54,768 INFO L225 Difference]: With dead ends: 133 [2023-12-18 21:28:54,768 INFO L226 Difference]: Without dead ends: 58 [2023-12-18 21:28:54,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-12-18 21:28:54,769 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:28:54,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 34 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:28:54,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-18 21:28:54,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2023-12-18 21:28:54,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 52 states have internal predecessors, (62), 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 21:28:54,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2023-12-18 21:28:54,776 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 36 [2023-12-18 21:28:54,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:28:54,776 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2023-12-18 21:28:54,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:28:54,776 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2023-12-18 21:28:54,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 21:28:54,777 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:54,777 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:28:54,783 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 21:28:54,980 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,SelfDestructingSolverStorable16 [2023-12-18 21:28:54,980 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:54,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:54,981 INFO L85 PathProgramCache]: Analyzing trace with hash 524550494, now seen corresponding path program 10 times [2023-12-18 21:28:54,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:54,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540038932] [2023-12-18 21:28:54,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:54,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:28:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 21:28:55,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:28:55,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540038932] [2023-12-18 21:28:55,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540038932] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:28:55,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720873776] [2023-12-18 21:28:55,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:28:55,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:55,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:28:55,585 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 21:28:55,612 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 21:28:55,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:28:55,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:28:55,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-18 21:28:55,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:28:55,685 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 21:28:55,786 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 19 treesize of output 11 [2023-12-18 21:28:55,853 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 19 treesize of output 11 [2023-12-18 21:28:55,940 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 19 treesize of output 11 [2023-12-18 21:28:56,039 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 19 treesize of output 11 [2023-12-18 21:28:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 21:28:56,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:28:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 21:28:56,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720873776] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:28:56,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:28:56,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 42 [2023-12-18 21:28:56,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562099209] [2023-12-18 21:28:56,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:28:56,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-18 21:28:56,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:28:56,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-18 21:28:56,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2023-12-18 21:28:56,628 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 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 21:28:58,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:28:58,578 INFO L93 Difference]: Finished difference Result 184 states and 217 transitions. [2023-12-18 21:28:58,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-12-18 21:28:58,579 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 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) Word has length 40 [2023-12-18 21:28:58,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:28:58,580 INFO L225 Difference]: With dead ends: 184 [2023-12-18 21:28:58,580 INFO L226 Difference]: Without dead ends: 175 [2023-12-18 21:28:58,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=565, Invalid=6077, Unknown=0, NotChecked=0, Total=6642 [2023-12-18 21:28:58,582 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 125 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 2113 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 2213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-18 21:28:58,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 326 Invalid, 2213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2113 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-18 21:28:58,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-12-18 21:28:58,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2023-12-18 21:28:58,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.2605042016806722) internal successors, (150), 119 states have internal predecessors, (150), 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 21:28:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 150 transitions. [2023-12-18 21:28:58,616 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 150 transitions. Word has length 40 [2023-12-18 21:28:58,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:28:58,617 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 150 transitions. [2023-12-18 21:28:58,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 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 21:28:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 150 transitions. [2023-12-18 21:28:58,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 21:28:58,617 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:58,617 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:28:58,622 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 21:28:58,822 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,SelfDestructingSolverStorable17 [2023-12-18 21:28:58,822 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:58,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:58,823 INFO L85 PathProgramCache]: Analyzing trace with hash 581808796, now seen corresponding path program 3 times [2023-12-18 21:28:58,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:58,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901493088] [2023-12-18 21:28:58,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:58,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:58,831 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:28:58,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272545503] [2023-12-18 21:28:58,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:28:58,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:58,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:28:58,832 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 21:28:58,857 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 21:28:58,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 21:28:58,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:28:58,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-18 21:28:58,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:28:58,922 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 27 treesize of output 15 [2023-12-18 21:28:58,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:28:58,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-12-18 21:28:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-18 21:28:59,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:28:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-18 21:28:59,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:28:59,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901493088] [2023-12-18 21:28:59,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:28:59,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272545503] [2023-12-18 21:28:59,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272545503] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:28:59,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:28:59,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2023-12-18 21:28:59,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528445692] [2023-12-18 21:28:59,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:28:59,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-18 21:28:59,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:28:59,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-18 21:28:59,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-12-18 21:28:59,142 INFO L87 Difference]: Start difference. First operand 120 states and 150 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 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 21:28:59,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:28:59,364 INFO L93 Difference]: Finished difference Result 196 states and 250 transitions. [2023-12-18 21:28:59,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-18 21:28:59,366 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 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 21:28:59,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:28:59,367 INFO L225 Difference]: With dead ends: 196 [2023-12-18 21:28:59,367 INFO L226 Difference]: Without dead ends: 192 [2023-12-18 21:28:59,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-12-18 21:28:59,368 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:28:59,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 37 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:28:59,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-12-18 21:28:59,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 173. [2023-12-18 21:28:59,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.302325581395349) internal successors, (224), 172 states have internal predecessors, (224), 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 21:28:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 224 transitions. [2023-12-18 21:28:59,394 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 224 transitions. Word has length 40 [2023-12-18 21:28:59,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:28:59,394 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 224 transitions. [2023-12-18 21:28:59,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 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 21:28:59,394 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 224 transitions. [2023-12-18 21:28:59,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 21:28:59,395 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:28:59,395 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:28:59,400 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 21:28:59,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:59,600 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:28:59,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:28:59,600 INFO L85 PathProgramCache]: Analyzing trace with hash -235839654, now seen corresponding path program 3 times [2023-12-18 21:28:59,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:28:59,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592949667] [2023-12-18 21:28:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:28:59,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:28:59,610 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:28:59,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628787679] [2023-12-18 21:28:59,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:28:59,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:28:59,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:28:59,611 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 21:28:59,616 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 21:28:59,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-18 21:28:59,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:28:59,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-18 21:28:59,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:28:59,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-18 21:28:59,849 INFO L349 Elim1Store]: treesize reduction 34, result has 26.1 percent of original size [2023-12-18 21:28:59,850 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 1 case distinctions, treesize of input 36 treesize of output 16 [2023-12-18 21:28:59,882 INFO L349 Elim1Store]: treesize reduction 34, result has 26.1 percent of original size [2023-12-18 21:28:59,882 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 1 case distinctions, treesize of input 36 treesize of output 16 [2023-12-18 21:28:59,917 INFO L349 Elim1Store]: treesize reduction 28, result has 39.1 percent of original size [2023-12-18 21:28:59,918 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 1 case distinctions, treesize of input 36 treesize of output 22 [2023-12-18 21:28:59,953 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:28:59,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-12-18 21:29:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 21:29:00,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:29:35,398 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 32 treesize of output 30 [2023-12-18 21:29:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:29:35,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:29:35,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592949667] [2023-12-18 21:29:35,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:29:35,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628787679] [2023-12-18 21:29:35,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628787679] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:29:35,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:29:35,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2023-12-18 21:29:35,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794260386] [2023-12-18 21:29:35,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:29:35,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-18 21:29:35,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:29:35,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-18 21:29:35,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=507, Unknown=5, NotChecked=0, Total=650 [2023-12-18 21:29:35,426 INFO L87 Difference]: Start difference. First operand 173 states and 224 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:29:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:29:35,928 INFO L93 Difference]: Finished difference Result 183 states and 234 transitions. [2023-12-18 21:29:35,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-18 21:29:35,929 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-18 21:29:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:29:35,929 INFO L225 Difference]: With dead ends: 183 [2023-12-18 21:29:35,929 INFO L226 Difference]: Without dead ends: 125 [2023-12-18 21:29:35,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=419, Invalid=1298, Unknown=5, NotChecked=0, Total=1722 [2023-12-18 21:29:35,930 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 90 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:29:35,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 34 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:29:35,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-12-18 21:29:35,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2023-12-18 21:29:35,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 120 states have internal predecessors, (149), 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 21:29:35,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2023-12-18 21:29:35,953 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 40 [2023-12-18 21:29:35,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:29:35,953 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2023-12-18 21:29:35,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:29:35,953 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2023-12-18 21:29:35,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-18 21:29:35,953 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:29:35,954 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:29:35,961 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 21:29:36,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:29:36,159 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:29:36,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:29:36,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1994181509, now seen corresponding path program 11 times [2023-12-18 21:29:36,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:29:36,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311466049] [2023-12-18 21:29:36,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:29:36,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:29:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:29:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 21:29:36,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:29:36,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311466049] [2023-12-18 21:29:36,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311466049] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:29:36,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180433158] [2023-12-18 21:29:36,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:29:36,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:29:36,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:29:36,327 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 21:29:36,339 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 21:29:36,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-18 21:29:36,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:29:36,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 21:29:36,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:29:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 21:29:36,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:29:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 21:29:36,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180433158] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:29:36,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:29:36,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-12-18 21:29:36,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576776214] [2023-12-18 21:29:36,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:29:36,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-18 21:29:36,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:29:36,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-18 21:29:36,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-12-18 21:29:36,719 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 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 21:29:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:29:37,144 INFO L93 Difference]: Finished difference Result 187 states and 229 transitions. [2023-12-18 21:29:37,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-18 21:29:37,145 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 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) Word has length 41 [2023-12-18 21:29:37,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:29:37,146 INFO L225 Difference]: With dead ends: 187 [2023-12-18 21:29:37,146 INFO L226 Difference]: Without dead ends: 167 [2023-12-18 21:29:37,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2023-12-18 21:29:37,146 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 89 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 21:29:37,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 25 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 21:29:37,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-12-18 21:29:37,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 110. [2023-12-18 21:29:37,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 109 states have internal predecessors, (136), 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 21:29:37,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 136 transitions. [2023-12-18 21:29:37,166 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 136 transitions. Word has length 41 [2023-12-18 21:29:37,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:29:37,166 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 136 transitions. [2023-12-18 21:29:37,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 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 21:29:37,166 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 136 transitions. [2023-12-18 21:29:37,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-18 21:29:37,166 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:29:37,166 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:29:37,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-18 21:29:37,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:29:37,371 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:29:37,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:29:37,371 INFO L85 PathProgramCache]: Analyzing trace with hash -963184485, now seen corresponding path program 12 times [2023-12-18 21:29:37,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:29:37,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281571443] [2023-12-18 21:29:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:29:37,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:29:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:29:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 21:29:37,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:29:37,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281571443] [2023-12-18 21:29:37,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281571443] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:29:37,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119876677] [2023-12-18 21:29:37,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:29:37,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:29:37,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:29:37,546 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:29:37,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-18 21:29:37,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-18 21:29:37,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:29:37,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-18 21:29:37,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:29:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:29:37,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:29:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 35 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:29:37,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119876677] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:29:37,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:29:37,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 24 [2023-12-18 21:29:37,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425098836] [2023-12-18 21:29:37,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:29:37,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-18 21:29:37,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:29:37,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-18 21:29:37,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2023-12-18 21:29:37,924 INFO L87 Difference]: Start difference. First operand 110 states and 136 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 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 21:29:38,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:29:38,142 INFO L93 Difference]: Finished difference Result 168 states and 204 transitions. [2023-12-18 21:29:38,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-18 21:29:38,143 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 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 43 [2023-12-18 21:29:38,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:29:38,144 INFO L225 Difference]: With dead ends: 168 [2023-12-18 21:29:38,144 INFO L226 Difference]: Without dead ends: 74 [2023-12-18 21:29:38,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 65 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2023-12-18 21:29:38,145 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 133 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:29:38,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 21 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:29:38,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-18 21:29:38,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2023-12-18 21:29:38,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 61 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 21:29:38,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2023-12-18 21:29:38,154 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 43 [2023-12-18 21:29:38,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:29:38,155 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2023-12-18 21:29:38,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 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 21:29:38,155 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2023-12-18 21:29:38,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-18 21:29:38,155 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:29:38,155 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:29:38,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-18 21:29:38,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-18 21:29:38,356 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:29:38,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:29:38,356 INFO L85 PathProgramCache]: Analyzing trace with hash 810092084, now seen corresponding path program 13 times [2023-12-18 21:29:38,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:29:38,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040337916] [2023-12-18 21:29:38,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:29:38,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:29:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:29:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-18 21:29:39,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:29:39,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040337916] [2023-12-18 21:29:39,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040337916] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:29:39,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270083812] [2023-12-18 21:29:39,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:29:39,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:29:39,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:29:39,083 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:29:39,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-18 21:29:39,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:29:39,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-18 21:29:39,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:29:39,193 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 21:29:39,312 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 19 treesize of output 11 [2023-12-18 21:29:39,400 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 19 treesize of output 11 [2023-12-18 21:29:39,501 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 19 treesize of output 11 [2023-12-18 21:29:39,627 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 19 treesize of output 11 [2023-12-18 21:29:39,765 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 19 treesize of output 11 [2023-12-18 21:29:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-18 21:29:39,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:29:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-18 21:29:40,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270083812] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:29:40,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:29:40,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 51 [2023-12-18 21:29:40,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900800413] [2023-12-18 21:29:40,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:29:40,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-18 21:29:40,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:29:40,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-18 21:29:40,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2381, Unknown=0, NotChecked=0, Total=2550 [2023-12-18 21:29:40,821 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 51 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 51 states have internal predecessors, (80), 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 21:29:43,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:29:43,788 INFO L93 Difference]: Finished difference Result 226 states and 269 transitions. [2023-12-18 21:29:43,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-12-18 21:29:43,788 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 51 states have internal predecessors, (80), 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 47 [2023-12-18 21:29:43,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:29:43,789 INFO L225 Difference]: With dead ends: 226 [2023-12-18 21:29:43,789 INFO L226 Difference]: Without dead ends: 215 [2023-12-18 21:29:43,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2841 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=785, Invalid=10557, Unknown=0, NotChecked=0, Total=11342 [2023-12-18 21:29:43,792 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 160 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 2842 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 2990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 2842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-18 21:29:43,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 322 Invalid, 2990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 2842 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-18 21:29:43,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-12-18 21:29:43,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 143. [2023-12-18 21:29:43,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.2605633802816902) internal successors, (179), 142 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:29:43,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 179 transitions. [2023-12-18 21:29:43,827 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 179 transitions. Word has length 47 [2023-12-18 21:29:43,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:29:43,827 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 179 transitions. [2023-12-18 21:29:43,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 51 states have internal predecessors, (80), 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 21:29:43,827 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 179 transitions. [2023-12-18 21:29:43,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-18 21:29:43,828 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:29:43,828 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:29:43,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-18 21:29:44,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-18 21:29:44,033 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:29:44,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:29:44,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1490150454, now seen corresponding path program 4 times [2023-12-18 21:29:44,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:29:44,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193990194] [2023-12-18 21:29:44,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:29:44,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:29:44,050 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:29:44,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054671834] [2023-12-18 21:29:44,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:29:44,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:29:44,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:29:44,061 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:29:44,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-18 21:29:44,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:29:44,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:29:44,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-18 21:29:44,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:29:44,186 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 23 treesize of output 13 [2023-12-18 21:29:44,208 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-12-18 21:29:44,208 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 1 case distinctions, treesize of input 33 treesize of output 13 [2023-12-18 21:29:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-18 21:29:44,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:29:44,389 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 36 treesize of output 32 [2023-12-18 21:29:44,412 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 21:29:44,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 42 [2023-12-18 21:29:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-18 21:29:44,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:29:44,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193990194] [2023-12-18 21:29:44,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:29:44,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054671834] [2023-12-18 21:29:44,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054671834] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:29:44,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:29:44,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2023-12-18 21:29:44,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722897752] [2023-12-18 21:29:44,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:29:44,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-18 21:29:44,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:29:44,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-18 21:29:44,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-12-18 21:29:44,438 INFO L87 Difference]: Start difference. First operand 143 states and 179 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 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 21:29:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:29:44,684 INFO L93 Difference]: Finished difference Result 245 states and 313 transitions. [2023-12-18 21:29:44,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-18 21:29:44,684 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 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 47 [2023-12-18 21:29:44,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:29:44,685 INFO L225 Difference]: With dead ends: 245 [2023-12-18 21:29:44,685 INFO L226 Difference]: Without dead ends: 216 [2023-12-18 21:29:44,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-12-18 21:29:44,686 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:29:44,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 110 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:29:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-12-18 21:29:44,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 189. [2023-12-18 21:29:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.2659574468085106) internal successors, (238), 188 states have internal predecessors, (238), 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 21:29:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 238 transitions. [2023-12-18 21:29:44,721 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 238 transitions. Word has length 47 [2023-12-18 21:29:44,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:29:44,721 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 238 transitions. [2023-12-18 21:29:44,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 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 21:29:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 238 transitions. [2023-12-18 21:29:44,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-18 21:29:44,722 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:29:44,722 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:29:44,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-18 21:29:44,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:29:44,923 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:29:44,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:29:44,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1552190068, now seen corresponding path program 4 times [2023-12-18 21:29:44,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:29:44,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379010988] [2023-12-18 21:29:44,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:29:44,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:29:44,942 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:29:44,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108808133] [2023-12-18 21:29:44,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:29:44,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:29:44,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:29:44,944 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:29:44,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-18 21:29:45,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:29:45,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:29:45,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-18 21:29:45,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:29:45,050 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 16 treesize of output 12 [2023-12-18 21:29:45,057 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 28 treesize of output 27 [2023-12-18 21:29:45,126 INFO L349 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2023-12-18 21:29:45,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 39 [2023-12-18 21:29:45,222 INFO L349 Elim1Store]: treesize reduction 54, result has 40.7 percent of original size [2023-12-18 21:29:45,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 51 [2023-12-18 21:29:45,388 INFO L349 Elim1Store]: treesize reduction 100, result has 31.5 percent of original size [2023-12-18 21:29:45,388 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 6 case distinctions, treesize of input 103 treesize of output 92 [2023-12-18 21:29:45,641 INFO L349 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2023-12-18 21:29:45,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 84 treesize of output 88 [2023-12-18 21:29:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-18 21:29:45,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:29:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 17 proven. 27 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-18 21:29:46,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:29:46,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379010988] [2023-12-18 21:29:46,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:29:46,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108808133] [2023-12-18 21:29:46,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108808133] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:29:46,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:29:46,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2023-12-18 21:29:46,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700909879] [2023-12-18 21:29:46,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:29:46,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-18 21:29:46,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:29:46,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-18 21:29:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2023-12-18 21:29:46,209 INFO L87 Difference]: Start difference. First operand 189 states and 238 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:29:47,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:29:47,281 INFO L93 Difference]: Finished difference Result 319 states and 413 transitions. [2023-12-18 21:29:47,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-18 21:29:47,282 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-12-18 21:29:47,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:29:47,282 INFO L225 Difference]: With dead ends: 319 [2023-12-18 21:29:47,283 INFO L226 Difference]: Without dead ends: 213 [2023-12-18 21:29:47,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=498, Invalid=2258, Unknown=0, NotChecked=0, Total=2756 [2023-12-18 21:29:47,285 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 21:29:47,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 46 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 21:29:47,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-12-18 21:29:47,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 201. [2023-12-18 21:29:47,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.27) internal successors, (254), 200 states have internal predecessors, (254), 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 21:29:47,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 254 transitions. [2023-12-18 21:29:47,325 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 254 transitions. Word has length 47 [2023-12-18 21:29:47,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:29:47,325 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 254 transitions. [2023-12-18 21:29:47,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:29:47,325 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 254 transitions. [2023-12-18 21:29:47,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-18 21:29:47,325 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:29:47,325 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:29:47,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-18 21:29:47,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:29:47,531 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:29:47,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:29:47,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1576831095, now seen corresponding path program 14 times [2023-12-18 21:29:47,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:29:47,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816709810] [2023-12-18 21:29:47,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:29:47,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:29:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:29:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-18 21:29:47,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:29:47,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816709810] [2023-12-18 21:29:47,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816709810] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:29:47,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861187465] [2023-12-18 21:29:47,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:29:47,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:29:47,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:29:47,704 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:29:47,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-18 21:29:47,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:29:47,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:29:47,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 21:29:47,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:29:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-18 21:29:47,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:29:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-18 21:29:48,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861187465] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:29:48,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:29:48,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-18 21:29:48,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540719909] [2023-12-18 21:29:48,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:29:48,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-18 21:29:48,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:29:48,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-18 21:29:48,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-12-18 21:29:48,040 INFO L87 Difference]: Start difference. First operand 201 states and 254 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 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 21:29:48,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:29:48,478 INFO L93 Difference]: Finished difference Result 292 states and 363 transitions. [2023-12-18 21:29:48,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-18 21:29:48,478 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 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 48 [2023-12-18 21:29:48,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:29:48,479 INFO L225 Difference]: With dead ends: 292 [2023-12-18 21:29:48,479 INFO L226 Difference]: Without dead ends: 269 [2023-12-18 21:29:48,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 76 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 21:29:48,480 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 127 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 21:29:48,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 32 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 21:29:48,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-12-18 21:29:48,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 178. [2023-12-18 21:29:48,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.2768361581920904) internal successors, (226), 177 states have internal predecessors, (226), 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 21:29:48,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 226 transitions. [2023-12-18 21:29:48,521 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 226 transitions. Word has length 48 [2023-12-18 21:29:48,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:29:48,521 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 226 transitions. [2023-12-18 21:29:48,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 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 21:29:48,521 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 226 transitions. [2023-12-18 21:29:48,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-18 21:29:48,522 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:29:48,522 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:29:48,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-18 21:29:48,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-18 21:29:48,722 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:29:48,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:29:48,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1571077125, now seen corresponding path program 15 times [2023-12-18 21:29:48,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:29:48,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454072202] [2023-12-18 21:29:48,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:29:48,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:29:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:29:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-18 21:29:48,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:29:48,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454072202] [2023-12-18 21:29:48,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454072202] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:29:48,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952520122] [2023-12-18 21:29:48,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:29:48,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:29:48,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:29:48,868 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:29:48,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-18 21:29:49,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-18 21:29:49,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:29:49,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 21:29:49,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:29:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-18 21:29:49,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:29:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-18 21:29:49,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952520122] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:29:49,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:29:49,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-18 21:29:49,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697682127] [2023-12-18 21:29:49,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:29:49,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-18 21:29:49,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:29:49,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-18 21:29:49,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-12-18 21:29:49,288 INFO L87 Difference]: Start difference. First operand 178 states and 226 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 21:29:49,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:29:49,458 INFO L93 Difference]: Finished difference Result 270 states and 335 transitions. [2023-12-18 21:29:49,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-18 21:29:49,459 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 50 [2023-12-18 21:29:49,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:29:49,459 INFO L225 Difference]: With dead ends: 270 [2023-12-18 21:29:49,459 INFO L226 Difference]: Without dead ends: 116 [2023-12-18 21:29:49,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-12-18 21:29:49,460 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 157 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:29:49,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 37 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:29:49,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-12-18 21:29:49,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 92. [2023-12-18 21:29:49,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2307692307692308) internal successors, (112), 91 states have internal predecessors, (112), 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 21:29:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2023-12-18 21:29:49,478 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 50 [2023-12-18 21:29:49,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:29:49,478 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2023-12-18 21:29:49,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 21:29:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2023-12-18 21:29:49,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-18 21:29:49,478 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:29:49,478 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:29:49,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-18 21:29:49,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-18 21:29:49,683 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:29:49,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:29:49,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1755186850, now seen corresponding path program 16 times [2023-12-18 21:29:49,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:29:49,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817383258] [2023-12-18 21:29:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:29:49,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:29:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:29:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-18 21:29:50,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:29:50,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817383258] [2023-12-18 21:29:50,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817383258] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:29:50,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878525851] [2023-12-18 21:29:50,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:29:50,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:29:50,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:29:50,691 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:29:50,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-18 21:29:50,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:29:50,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:29:50,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-18 21:29:50,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:29:50,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:29:50,943 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 19 treesize of output 11 [2023-12-18 21:29:51,022 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 19 treesize of output 11 [2023-12-18 21:29:51,102 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 19 treesize of output 11 [2023-12-18 21:29:51,194 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 19 treesize of output 11 [2023-12-18 21:29:51,330 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 19 treesize of output 11 [2023-12-18 21:29:51,483 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 19 treesize of output 11 [2023-12-18 21:29:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-18 21:29:51,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:29:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-18 21:29:52,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878525851] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:29:52,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:29:52,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 23] total 60 [2023-12-18 21:29:52,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355434957] [2023-12-18 21:29:52,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:29:52,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-12-18 21:29:52,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:29:52,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-12-18 21:29:52,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3339, Unknown=0, NotChecked=0, Total=3540 [2023-12-18 21:29:52,742 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 60 states, 60 states have (on average 1.5166666666666666) internal successors, (91), 60 states have internal predecessors, (91), 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 21:29:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:29:57,454 INFO L93 Difference]: Finished difference Result 349 states and 422 transitions. [2023-12-18 21:29:57,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-12-18 21:29:57,454 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5166666666666666) internal successors, (91), 60 states have internal predecessors, (91), 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 54 [2023-12-18 21:29:57,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:29:57,455 INFO L225 Difference]: With dead ends: 349 [2023-12-18 21:29:57,455 INFO L226 Difference]: Without dead ends: 338 [2023-12-18 21:29:57,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4773 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1042, Invalid=17048, Unknown=0, NotChecked=0, Total=18090 [2023-12-18 21:29:57,458 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 203 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 4292 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 4507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 4292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:29:57,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 447 Invalid, 4507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 4292 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-18 21:29:57,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-12-18 21:29:57,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 223. [2023-12-18 21:29:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.2792792792792793) internal successors, (284), 222 states have internal predecessors, (284), 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 21:29:57,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 284 transitions. [2023-12-18 21:29:57,506 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 284 transitions. Word has length 54 [2023-12-18 21:29:57,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:29:57,506 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 284 transitions. [2023-12-18 21:29:57,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5166666666666666) internal successors, (91), 60 states have internal predecessors, (91), 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 21:29:57,507 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 284 transitions. [2023-12-18 21:29:57,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-18 21:29:57,508 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:29:57,508 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:29:57,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-18 21:29:57,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-18 21:29:57,713 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:29:57,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:29:57,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1075128480, now seen corresponding path program 5 times [2023-12-18 21:29:57,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:29:57,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174910952] [2023-12-18 21:29:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:29:57,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:29:57,725 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:29:57,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082804236] [2023-12-18 21:29:57,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:29:57,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:29:57,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:29:57,726 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:29:57,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-18 21:29:58,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-18 21:29:58,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:29:58,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-18 21:29:58,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:29:58,668 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 23 treesize of output 13 [2023-12-18 21:29:58,716 INFO L349 Elim1Store]: treesize reduction 22, result has 38.9 percent of original size [2023-12-18 21:29:58,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 31 [2023-12-18 21:29:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-18 21:29:58,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:29:59,151 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 55 treesize of output 49 [2023-12-18 21:29:59,155 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-18 21:29:59,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2023-12-18 21:29:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 26 proven. 74 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-18 21:29:59,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:29:59,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174910952] [2023-12-18 21:29:59,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:29:59,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082804236] [2023-12-18 21:29:59,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082804236] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:29:59,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:29:59,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2023-12-18 21:29:59,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907116638] [2023-12-18 21:29:59,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:29:59,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-18 21:29:59,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:29:59,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-18 21:29:59,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2023-12-18 21:29:59,169 INFO L87 Difference]: Start difference. First operand 223 states and 284 transitions. Second operand has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 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 21:29:59,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:29:59,786 INFO L93 Difference]: Finished difference Result 362 states and 468 transitions. [2023-12-18 21:29:59,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-18 21:29:59,786 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 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 54 [2023-12-18 21:29:59,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:29:59,787 INFO L225 Difference]: With dead ends: 362 [2023-12-18 21:29:59,787 INFO L226 Difference]: Without dead ends: 330 [2023-12-18 21:29:59,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2023-12-18 21:29:59,792 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 21:29:59,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 112 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 21:29:59,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-12-18 21:29:59,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 290. [2023-12-18 21:29:59,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.2802768166089966) internal successors, (370), 289 states have internal predecessors, (370), 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 21:29:59,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 370 transitions. [2023-12-18 21:29:59,868 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 370 transitions. Word has length 54 [2023-12-18 21:29:59,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:29:59,868 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 370 transitions. [2023-12-18 21:29:59,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 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 21:29:59,868 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 370 transitions. [2023-12-18 21:29:59,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-18 21:29:59,869 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:29:59,869 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:29:59,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-18 21:30:00,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-18 21:30:00,077 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:30:00,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:30:00,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1222261798, now seen corresponding path program 5 times [2023-12-18 21:30:00,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:30:00,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489149120] [2023-12-18 21:30:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:30:00,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:30:00,092 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:30:00,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534839741] [2023-12-18 21:30:00,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:30:00,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:00,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:30:00,094 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:30:00,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-18 21:30:01,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-18 21:30:01,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:30:01,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-18 21:30:01,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:30:01,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-18 21:30:01,206 INFO L349 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-12-18 21:30:01,206 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 1 case distinctions, treesize of input 25 treesize of output 24 [2023-12-18 21:30:01,241 INFO L349 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2023-12-18 21:30:01,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2023-12-18 21:30:01,586 INFO L349 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2023-12-18 21:30:01,586 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 5 case distinctions, treesize of input 47 treesize of output 41 [2023-12-18 21:30:01,654 INFO L349 Elim1Store]: treesize reduction 76, result has 23.2 percent of original size [2023-12-18 21:30:01,655 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 5 case distinctions, treesize of input 51 treesize of output 41 [2023-12-18 21:30:01,725 INFO L349 Elim1Store]: treesize reduction 76, result has 23.2 percent of original size [2023-12-18 21:30:01,725 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 5 case distinctions, treesize of input 51 treesize of output 41 [2023-12-18 21:30:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 30 proven. 35 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-18 21:30:01,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:30:02,109 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 23 treesize of output 21 [2023-12-18 21:30:02,111 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 25 treesize of output 21 [2023-12-18 21:30:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-18 21:30:02,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:30:02,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489149120] [2023-12-18 21:30:02,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:30:02,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534839741] [2023-12-18 21:30:02,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534839741] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:30:02,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:30:02,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2023-12-18 21:30:02,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832201017] [2023-12-18 21:30:02,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:30:02,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-18 21:30:02,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:30:02,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-18 21:30:02,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-12-18 21:30:02,117 INFO L87 Difference]: Start difference. First operand 290 states and 370 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:30:02,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:30:02,407 INFO L93 Difference]: Finished difference Result 323 states and 408 transitions. [2023-12-18 21:30:02,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 21:30:02,407 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-12-18 21:30:02,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:30:02,408 INFO L225 Difference]: With dead ends: 323 [2023-12-18 21:30:02,408 INFO L226 Difference]: Without dead ends: 158 [2023-12-18 21:30:02,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-12-18 21:30:02,409 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:30:02,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 69 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:30:02,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-12-18 21:30:02,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2023-12-18 21:30:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.1895424836601307) internal successors, (182), 153 states have internal predecessors, (182), 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 21:30:02,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 182 transitions. [2023-12-18 21:30:02,444 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 182 transitions. Word has length 54 [2023-12-18 21:30:02,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:30:02,444 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 182 transitions. [2023-12-18 21:30:02,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:30:02,444 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 182 transitions. [2023-12-18 21:30:02,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-18 21:30:02,445 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:30:02,445 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:30:02,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-18 21:30:02,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:02,654 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:30:02,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:30:02,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1291389509, now seen corresponding path program 17 times [2023-12-18 21:30:02,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:30:02,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702135858] [2023-12-18 21:30:02,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:30:02,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:30:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:30:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 15 proven. 64 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-18 21:30:02,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:30:02,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702135858] [2023-12-18 21:30:02,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702135858] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:30:02,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684328018] [2023-12-18 21:30:02,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:30:02,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:02,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:30:02,868 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:30:02,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-18 21:30:03,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-18 21:30:03,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:30:03,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 21:30:03,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:30:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-18 21:30:03,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:30:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-18 21:30:03,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684328018] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:30:03,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:30:03,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-12-18 21:30:03,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265585987] [2023-12-18 21:30:03,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:30:03,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-18 21:30:03,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:30:03,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-18 21:30:03,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-12-18 21:30:03,701 INFO L87 Difference]: Start difference. First operand 154 states and 182 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 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 21:30:04,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:30:04,257 INFO L93 Difference]: Finished difference Result 241 states and 284 transitions. [2023-12-18 21:30:04,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 21:30:04,257 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 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 55 [2023-12-18 21:30:04,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:30:04,258 INFO L225 Difference]: With dead ends: 241 [2023-12-18 21:30:04,258 INFO L226 Difference]: Without dead ends: 215 [2023-12-18 21:30:04,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 87 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2023-12-18 21:30:04,273 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 126 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 21:30:04,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 41 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 21:30:04,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-12-18 21:30:04,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 134. [2023-12-18 21:30:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.2030075187969924) internal successors, (160), 133 states have internal predecessors, (160), 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 21:30:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2023-12-18 21:30:04,319 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 55 [2023-12-18 21:30:04,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:30:04,320 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2023-12-18 21:30:04,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 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 21:30:04,320 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2023-12-18 21:30:04,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-18 21:30:04,320 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:30:04,320 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:30:04,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-18 21:30:04,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:04,526 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:30:04,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:30:04,527 INFO L85 PathProgramCache]: Analyzing trace with hash -300547941, now seen corresponding path program 18 times [2023-12-18 21:30:04,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:30:04,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691201014] [2023-12-18 21:30:04,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:30:04,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:30:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:30:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 54 proven. 37 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-18 21:30:04,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:30:04,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691201014] [2023-12-18 21:30:04,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691201014] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:30:04,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596282052] [2023-12-18 21:30:04,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:30:04,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:04,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:30:04,708 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:30:04,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-18 21:30:04,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-12-18 21:30:04,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:30:04,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-18 21:30:04,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:30:05,141 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 86 proven. 21 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-18 21:30:05,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:30:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 70 proven. 37 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-18 21:30:05,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596282052] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:30:05,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:30:05,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 18] total 31 [2023-12-18 21:30:05,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445350375] [2023-12-18 21:30:05,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:30:05,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-18 21:30:05,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:30:05,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-18 21:30:05,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2023-12-18 21:30:05,282 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 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 21:30:05,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:30:05,646 INFO L93 Difference]: Finished difference Result 222 states and 262 transitions. [2023-12-18 21:30:05,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-18 21:30:05,646 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 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 21:30:05,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:30:05,647 INFO L225 Difference]: With dead ends: 222 [2023-12-18 21:30:05,647 INFO L226 Difference]: Without dead ends: 104 [2023-12-18 21:30:05,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 87 SyntacticMatches, 13 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=590, Invalid=1860, Unknown=0, NotChecked=0, Total=2450 [2023-12-18 21:30:05,647 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 224 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:30:05,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 33 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:30:05,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-12-18 21:30:05,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2023-12-18 21:30:05,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 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 21:30:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-12-18 21:30:05,668 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 57 [2023-12-18 21:30:05,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:30:05,668 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-12-18 21:30:05,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 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 21:30:05,668 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-12-18 21:30:05,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-18 21:30:05,668 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:30:05,668 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:30:05,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-18 21:30:05,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-18 21:30:05,874 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:30:05,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:30:05,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1249919156, now seen corresponding path program 19 times [2023-12-18 21:30:05,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:30:05,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571580997] [2023-12-18 21:30:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:30:05,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:30:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:30:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-18 21:30:06,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:30:06,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571580997] [2023-12-18 21:30:06,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571580997] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:30:06,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944805199] [2023-12-18 21:30:06,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:30:06,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:06,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:30:06,977 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:30:06,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-18 21:30:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:30:07,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 83 conjunts are in the unsatisfiable core [2023-12-18 21:30:07,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:30:07,125 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 21:30:07,296 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 19 treesize of output 11 [2023-12-18 21:30:07,392 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 19 treesize of output 11 [2023-12-18 21:30:07,509 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 19 treesize of output 11 [2023-12-18 21:30:07,645 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 19 treesize of output 11 [2023-12-18 21:30:07,796 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 19 treesize of output 11 [2023-12-18 21:30:07,975 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 19 treesize of output 11 [2023-12-18 21:30:08,178 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 19 treesize of output 11 [2023-12-18 21:30:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-18 21:30:08,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:30:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-18 21:30:10,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944805199] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:30:10,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:30:10,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 26, 26] total 69 [2023-12-18 21:30:10,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140297965] [2023-12-18 21:30:10,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:30:10,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-12-18 21:30:10,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:30:10,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-12-18 21:30:10,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4459, Unknown=0, NotChecked=0, Total=4692 [2023-12-18 21:30:10,012 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 69 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 69 states have internal predecessors, (102), 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 21:30:15,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:30:15,800 INFO L93 Difference]: Finished difference Result 256 states and 305 transitions. [2023-12-18 21:30:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-12-18 21:30:15,801 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 69 states have internal predecessors, (102), 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 61 [2023-12-18 21:30:15,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:30:15,802 INFO L225 Difference]: With dead ends: 256 [2023-12-18 21:30:15,802 INFO L226 Difference]: Without dead ends: 245 [2023-12-18 21:30:15,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5032 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1012, Invalid=18728, Unknown=0, NotChecked=0, Total=19740 [2023-12-18 21:30:15,803 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 125 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 5093 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 5290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 5093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-18 21:30:15,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 367 Invalid, 5290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 5093 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-18 21:30:15,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-12-18 21:30:15,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 173. [2023-12-18 21:30:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.197674418604651) internal successors, (206), 172 states have internal predecessors, (206), 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 21:30:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 206 transitions. [2023-12-18 21:30:15,865 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 206 transitions. Word has length 61 [2023-12-18 21:30:15,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:30:15,866 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 206 transitions. [2023-12-18 21:30:15,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 69 states have internal predecessors, (102), 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 21:30:15,866 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 206 transitions. [2023-12-18 21:30:15,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-18 21:30:15,866 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:30:15,866 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:30:15,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-18 21:30:16,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:16,071 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:30:16,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:30:16,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1929977526, now seen corresponding path program 6 times [2023-12-18 21:30:16,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:30:16,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462507975] [2023-12-18 21:30:16,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:30:16,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:30:16,084 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:30:16,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698276618] [2023-12-18 21:30:16,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:30:16,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:16,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:30:16,102 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:30:16,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-18 21:30:16,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-18 21:30:16,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:30:16,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-18 21:30:16,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:30:16,337 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 27 treesize of output 15 [2023-12-18 21:30:16,360 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 36 treesize of output 16 [2023-12-18 21:30:16,436 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:30:16,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-12-18 21:30:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-18 21:30:16,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:30:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 32 proven. 38 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-12-18 21:30:16,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:30:16,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462507975] [2023-12-18 21:30:16,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:30:16,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698276618] [2023-12-18 21:30:16,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698276618] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:30:16,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:30:16,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2023-12-18 21:30:16,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204797383] [2023-12-18 21:30:16,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:30:16,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-18 21:30:16,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:30:16,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-18 21:30:16,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-12-18 21:30:16,648 INFO L87 Difference]: Start difference. First operand 173 states and 206 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 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 21:30:17,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:30:17,138 INFO L93 Difference]: Finished difference Result 223 states and 262 transitions. [2023-12-18 21:30:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-18 21:30:17,138 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 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 61 [2023-12-18 21:30:17,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:30:17,139 INFO L225 Difference]: With dead ends: 223 [2023-12-18 21:30:17,139 INFO L226 Difference]: Without dead ends: 219 [2023-12-18 21:30:17,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=307, Invalid=1099, Unknown=0, NotChecked=0, Total=1406 [2023-12-18 21:30:17,140 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 48 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:30:17,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 30 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:30:17,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-12-18 21:30:17,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 167. [2023-12-18 21:30:17,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1987951807228916) internal successors, (199), 166 states have internal predecessors, (199), 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 21:30:17,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 199 transitions. [2023-12-18 21:30:17,186 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 199 transitions. Word has length 61 [2023-12-18 21:30:17,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:30:17,186 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 199 transitions. [2023-12-18 21:30:17,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 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 21:30:17,186 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 199 transitions. [2023-12-18 21:30:17,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-18 21:30:17,187 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:30:17,187 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:30:17,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-18 21:30:17,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:17,392 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:30:17,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:30:17,393 INFO L85 PathProgramCache]: Analyzing trace with hash 664079092, now seen corresponding path program 6 times [2023-12-18 21:30:17,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:30:17,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002867370] [2023-12-18 21:30:17,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:30:17,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:30:17,404 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:30:17,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229340358] [2023-12-18 21:30:17,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:30:17,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:17,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:30:17,412 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:30:17,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-18 21:30:17,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-12-18 21:30:17,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:30:17,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-18 21:30:17,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:30:17,722 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 16 treesize of output 12 [2023-12-18 21:30:17,728 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 29 treesize of output 28 [2023-12-18 21:30:17,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:30:17,740 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 40 treesize of output 42 [2023-12-18 21:30:17,825 INFO L349 Elim1Store]: treesize reduction 81, result has 40.4 percent of original size [2023-12-18 21:30:17,826 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 6 case distinctions, treesize of input 60 treesize of output 64 [2023-12-18 21:30:17,933 INFO L349 Elim1Store]: treesize reduction 81, result has 40.4 percent of original size [2023-12-18 21:30:17,934 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 6 case distinctions, treesize of input 76 treesize of output 80 [2023-12-18 21:30:18,102 INFO L349 Elim1Store]: treesize reduction 81, result has 40.4 percent of original size [2023-12-18 21:30:18,102 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 6 case distinctions, treesize of input 89 treesize of output 93 [2023-12-18 21:30:18,276 INFO L349 Elim1Store]: treesize reduction 81, result has 40.4 percent of original size [2023-12-18 21:30:18,276 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 6 case distinctions, treesize of input 102 treesize of output 106 [2023-12-18 21:30:18,435 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:30:18,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 105 treesize of output 100 [2023-12-18 21:30:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 86 proven. 72 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 21:30:18,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:30:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 60 proven. 98 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 21:30:19,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:30:19,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002867370] [2023-12-18 21:30:19,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:30:19,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229340358] [2023-12-18 21:30:19,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229340358] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:30:19,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:30:19,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 54 [2023-12-18 21:30:19,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687566162] [2023-12-18 21:30:19,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:30:19,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-12-18 21:30:19,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:30:19,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-12-18 21:30:19,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=2305, Unknown=0, NotChecked=0, Total=2862 [2023-12-18 21:30:19,702 INFO L87 Difference]: Start difference. First operand 167 states and 199 transitions. Second operand has 54 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:30:25,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:30:25,112 INFO L93 Difference]: Finished difference Result 410 states and 511 transitions. [2023-12-18 21:30:25,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-12-18 21:30:25,113 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-12-18 21:30:25,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:30:25,114 INFO L225 Difference]: With dead ends: 410 [2023-12-18 21:30:25,114 INFO L226 Difference]: Without dead ends: 283 [2023-12-18 21:30:25,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6434 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=4141, Invalid=17911, Unknown=0, NotChecked=0, Total=22052 [2023-12-18 21:30:25,122 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 194 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-18 21:30:25,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 67 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-18 21:30:25,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-12-18 21:30:25,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 217. [2023-12-18 21:30:25,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.2361111111111112) internal successors, (267), 216 states have internal predecessors, (267), 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 21:30:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 267 transitions. [2023-12-18 21:30:25,233 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 267 transitions. Word has length 61 [2023-12-18 21:30:25,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:30:25,233 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 267 transitions. [2023-12-18 21:30:25,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:30:25,234 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 267 transitions. [2023-12-18 21:30:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-18 21:30:25,234 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:30:25,234 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:30:25,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-18 21:30:25,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-18 21:30:25,440 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:30:25,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:30:25,440 INFO L85 PathProgramCache]: Analyzing trace with hash -212528713, now seen corresponding path program 20 times [2023-12-18 21:30:25,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:30:25,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889143429] [2023-12-18 21:30:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:30:25,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:30:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:30:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 21 proven. 85 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-18 21:30:25,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:30:25,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889143429] [2023-12-18 21:30:25,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889143429] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:30:25,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757375646] [2023-12-18 21:30:25,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:30:25,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:25,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:30:25,684 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:30:25,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-18 21:30:25,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:30:25,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:30:25,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-18 21:30:25,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:30:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 28 proven. 78 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-18 21:30:26,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:30:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 28 proven. 78 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-18 21:30:26,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757375646] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:30:26,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:30:26,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-12-18 21:30:26,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255989882] [2023-12-18 21:30:26,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:30:26,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-18 21:30:26,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:30:26,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-18 21:30:26,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-12-18 21:30:26,162 INFO L87 Difference]: Start difference. First operand 217 states and 267 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 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 21:30:26,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:30:26,768 INFO L93 Difference]: Finished difference Result 337 states and 409 transitions. [2023-12-18 21:30:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-18 21:30:26,768 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2023-12-18 21:30:26,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:30:26,769 INFO L225 Difference]: With dead ends: 337 [2023-12-18 21:30:26,769 INFO L226 Difference]: Without dead ends: 308 [2023-12-18 21:30:26,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 98 SyntacticMatches, 16 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=440, Invalid=1540, Unknown=0, NotChecked=0, Total=1980 [2023-12-18 21:30:26,771 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 174 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 21:30:26,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 31 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 21:30:26,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-12-18 21:30:26,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 196. [2023-12-18 21:30:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.2461538461538462) internal successors, (243), 195 states have internal predecessors, (243), 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 21:30:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 243 transitions. [2023-12-18 21:30:26,827 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 243 transitions. Word has length 62 [2023-12-18 21:30:26,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:30:26,827 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 243 transitions. [2023-12-18 21:30:26,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 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 21:30:26,828 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 243 transitions. [2023-12-18 21:30:26,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-18 21:30:26,828 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:30:26,828 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:30:26,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-18 21:30:27,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-18 21:30:27,029 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:30:27,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:30:27,030 INFO L85 PathProgramCache]: Analyzing trace with hash 514158981, now seen corresponding path program 21 times [2023-12-18 21:30:27,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:30:27,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158479299] [2023-12-18 21:30:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:30:27,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:30:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:30:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-18 21:30:27,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:30:27,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158479299] [2023-12-18 21:30:27,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158479299] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:30:27,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458478322] [2023-12-18 21:30:27,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:30:27,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:27,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:30:27,273 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:30:27,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-18 21:30:27,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-18 21:30:27,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:30:27,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-18 21:30:27,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:30:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 92 proven. 28 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-18 21:30:27,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:30:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 92 proven. 28 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-18 21:30:27,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458478322] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:30:27,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:30:27,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-12-18 21:30:27,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868782741] [2023-12-18 21:30:27,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:30:27,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-18 21:30:27,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:30:27,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-18 21:30:27,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-12-18 21:30:27,965 INFO L87 Difference]: Start difference. First operand 196 states and 243 transitions. Second operand has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 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 21:30:28,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:30:28,261 INFO L93 Difference]: Finished difference Result 315 states and 383 transitions. [2023-12-18 21:30:28,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 21:30:28,261 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 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 64 [2023-12-18 21:30:28,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:30:28,262 INFO L225 Difference]: With dead ends: 315 [2023-12-18 21:30:28,262 INFO L226 Difference]: Without dead ends: 152 [2023-12-18 21:30:28,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 103 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2023-12-18 21:30:28,263 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 235 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:30:28,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 36 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:30:28,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-12-18 21:30:28,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 116. [2023-12-18 21:30:28,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.2173913043478262) internal successors, (140), 115 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:30:28,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 140 transitions. [2023-12-18 21:30:28,297 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 140 transitions. Word has length 64 [2023-12-18 21:30:28,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:30:28,297 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 140 transitions. [2023-12-18 21:30:28,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 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 21:30:28,297 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 140 transitions. [2023-12-18 21:30:28,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-18 21:30:28,297 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:30:28,297 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:30:28,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-12-18 21:30:28,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-18 21:30:28,503 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:30:28,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:30:28,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1155375454, now seen corresponding path program 22 times [2023-12-18 21:30:28,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:30:28,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392235883] [2023-12-18 21:30:28,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:30:28,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:30:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:30:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-18 21:30:29,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:30:29,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392235883] [2023-12-18 21:30:29,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392235883] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:30:29,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146507425] [2023-12-18 21:30:29,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:30:29,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:29,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:30:29,833 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:30:29,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-18 21:30:30,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:30:30,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:30:30,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 93 conjunts are in the unsatisfiable core [2023-12-18 21:30:30,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:30:30,046 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 21:30:30,173 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 19 treesize of output 11 [2023-12-18 21:30:30,263 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 19 treesize of output 11 [2023-12-18 21:30:30,380 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 19 treesize of output 11 [2023-12-18 21:30:30,528 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 19 treesize of output 11 [2023-12-18 21:30:30,687 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 19 treesize of output 11 [2023-12-18 21:30:30,885 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 19 treesize of output 11 [2023-12-18 21:30:31,101 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 19 treesize of output 11 [2023-12-18 21:30:31,350 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 19 treesize of output 11 [2023-12-18 21:30:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-18 21:30:31,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:30:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-18 21:30:33,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146507425] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:30:33,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:30:33,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 29, 29] total 78 [2023-12-18 21:30:33,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97311514] [2023-12-18 21:30:33,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:30:33,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-12-18 21:30:33,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:30:33,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-12-18 21:30:33,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=5741, Unknown=0, NotChecked=0, Total=6006 [2023-12-18 21:30:33,709 INFO L87 Difference]: Start difference. First operand 116 states and 140 transitions. Second operand has 78 states, 78 states have (on average 1.4487179487179487) internal successors, (113), 78 states have internal predecessors, (113), 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 21:30:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:30:41,323 INFO L93 Difference]: Finished difference Result 340 states and 416 transitions. [2023-12-18 21:30:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-12-18 21:30:41,324 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.4487179487179487) internal successors, (113), 78 states have internal predecessors, (113), 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 21:30:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:30:41,325 INFO L225 Difference]: With dead ends: 340 [2023-12-18 21:30:41,325 INFO L226 Difference]: Without dead ends: 326 [2023-12-18 21:30:41,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6765 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1181, Invalid=24901, Unknown=0, NotChecked=0, Total=26082 [2023-12-18 21:30:41,326 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 129 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 6468 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 6685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 6468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-12-18 21:30:41,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 400 Invalid, 6685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 6468 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-12-18 21:30:41,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-12-18 21:30:41,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 234. [2023-12-18 21:30:41,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.2317596566523605) internal successors, (287), 233 states have internal predecessors, (287), 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 21:30:41,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 287 transitions. [2023-12-18 21:30:41,409 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 287 transitions. Word has length 68 [2023-12-18 21:30:41,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:30:41,409 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 287 transitions. [2023-12-18 21:30:41,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.4487179487179487) internal successors, (113), 78 states have internal predecessors, (113), 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 21:30:41,410 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 287 transitions. [2023-12-18 21:30:41,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-18 21:30:41,410 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:30:41,410 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:30:41,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-12-18 21:30:41,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:41,616 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:30:41,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:30:41,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1413540892, now seen corresponding path program 7 times [2023-12-18 21:30:41,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:30:41,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900742928] [2023-12-18 21:30:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:30:41,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:30:41,630 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:30:41,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577648349] [2023-12-18 21:30:41,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:30:41,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:41,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:30:41,632 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:30:41,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-18 21:30:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:30:41,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-18 21:30:41,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:30:41,892 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 19 treesize of output 11 [2023-12-18 21:30:41,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:30:41,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-18 21:30:41,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:30:41,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-18 21:30:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 47 proven. 160 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 21:30:42,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:30:42,371 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 36 treesize of output 32 [2023-12-18 21:30:42,374 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 21:30:42,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 90 [2023-12-18 21:30:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 46 proven. 130 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-18 21:30:42,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:30:42,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900742928] [2023-12-18 21:30:42,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:30:42,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577648349] [2023-12-18 21:30:42,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577648349] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:30:42,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:30:42,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2023-12-18 21:30:42,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24836726] [2023-12-18 21:30:42,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:30:42,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-18 21:30:42,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:30:42,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-18 21:30:42,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2023-12-18 21:30:42,450 INFO L87 Difference]: Start difference. First operand 234 states and 287 transitions. Second operand has 37 states, 37 states have (on average 2.918918918918919) internal successors, (108), 37 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:30:42,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:30:42,988 INFO L93 Difference]: Finished difference Result 376 states and 467 transitions. [2023-12-18 21:30:42,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-18 21:30:42,988 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.918918918918919) internal successors, (108), 37 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-12-18 21:30:42,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:30:42,989 INFO L225 Difference]: With dead ends: 376 [2023-12-18 21:30:42,989 INFO L226 Difference]: Without dead ends: 364 [2023-12-18 21:30:42,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2023-12-18 21:30:42,990 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 139 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 21:30:42,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 113 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 21:30:42,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-12-18 21:30:43,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 328. [2023-12-18 21:30:43,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.2446483180428134) internal successors, (407), 327 states have internal predecessors, (407), 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 21:30:43,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 407 transitions. [2023-12-18 21:30:43,106 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 407 transitions. Word has length 68 [2023-12-18 21:30:43,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:30:43,106 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 407 transitions. [2023-12-18 21:30:43,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.918918918918919) internal successors, (108), 37 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:30:43,106 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 407 transitions. [2023-12-18 21:30:43,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-18 21:30:43,107 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:30:43,107 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:30:43,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-12-18 21:30:43,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-18 21:30:43,313 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:30:43,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:30:43,313 INFO L85 PathProgramCache]: Analyzing trace with hash 299158498, now seen corresponding path program 7 times [2023-12-18 21:30:43,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:30:43,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918475697] [2023-12-18 21:30:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:30:43,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:30:43,330 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:30:43,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170300495] [2023-12-18 21:30:43,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:30:43,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:43,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:30:43,331 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:30:43,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-18 21:30:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:30:43,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-18 21:30:43,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:30:43,553 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 21:30:43,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-18 21:30:43,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:30:43,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-18 21:30:43,601 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:30:43,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-18 21:30:43,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:30:43,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 41 [2023-12-18 21:30:43,713 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:30:43,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 41 [2023-12-18 21:30:43,761 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:30:43,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 41 [2023-12-18 21:30:43,808 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:30:43,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 41 [2023-12-18 21:30:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-12-18 21:30:43,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:30:44,052 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 40 treesize of output 38 [2023-12-18 21:30:44,054 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 43 treesize of output 39 [2023-12-18 21:30:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-12-18 21:30:44,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:30:44,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918475697] [2023-12-18 21:30:44,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:30:44,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170300495] [2023-12-18 21:30:44,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170300495] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:30:44,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:30:44,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2023-12-18 21:30:44,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802888126] [2023-12-18 21:30:44,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:30:44,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-18 21:30:44,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:30:44,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-18 21:30:44,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2023-12-18 21:30:44,184 INFO L87 Difference]: Start difference. First operand 328 states and 407 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 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 21:30:44,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:30:44,941 INFO L93 Difference]: Finished difference Result 423 states and 527 transitions. [2023-12-18 21:30:44,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-18 21:30:44,942 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 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 21:30:44,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:30:44,942 INFO L225 Difference]: With dead ends: 423 [2023-12-18 21:30:44,942 INFO L226 Difference]: Without dead ends: 191 [2023-12-18 21:30:44,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=291, Invalid=1689, Unknown=0, NotChecked=0, Total=1980 [2023-12-18 21:30:44,943 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 21:30:44,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 91 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 21:30:44,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-12-18 21:30:45,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2023-12-18 21:30:45,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.1578947368421053) internal successors, (220), 190 states have internal predecessors, (220), 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 21:30:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 220 transitions. [2023-12-18 21:30:45,012 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 220 transitions. Word has length 68 [2023-12-18 21:30:45,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:30:45,012 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 220 transitions. [2023-12-18 21:30:45,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 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 21:30:45,012 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 220 transitions. [2023-12-18 21:30:45,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-18 21:30:45,012 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:30:45,012 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:30:45,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-12-18 21:30:45,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-18 21:30:45,218 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:30:45,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:30:45,218 INFO L85 PathProgramCache]: Analyzing trace with hash -758171909, now seen corresponding path program 23 times [2023-12-18 21:30:45,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:30:45,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188584029] [2023-12-18 21:30:45,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:30:45,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:30:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:30:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 28 proven. 109 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-18 21:30:45,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:30:45,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188584029] [2023-12-18 21:30:45,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188584029] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:30:45,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748129381] [2023-12-18 21:30:45,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:30:45,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:45,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:30:45,453 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:30:45,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-18 21:30:47,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-12-18 21:30:47,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:30:47,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-18 21:30:47,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:30:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 36 proven. 101 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-18 21:30:48,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:30:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 36 proven. 101 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-18 21:30:48,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748129381] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:30:48,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:30:48,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-12-18 21:30:48,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885638189] [2023-12-18 21:30:48,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:30:48,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-18 21:30:48,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:30:48,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-18 21:30:48,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-12-18 21:30:48,307 INFO L87 Difference]: Start difference. First operand 191 states and 220 transitions. Second operand has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 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 21:30:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:30:49,054 INFO L93 Difference]: Finished difference Result 276 states and 318 transitions. [2023-12-18 21:30:49,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-18 21:30:49,055 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 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) Word has length 69 [2023-12-18 21:30:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:30:49,056 INFO L225 Difference]: With dead ends: 276 [2023-12-18 21:30:49,056 INFO L226 Difference]: Without dead ends: 244 [2023-12-18 21:30:49,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 109 SyntacticMatches, 18 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=538, Invalid=1912, Unknown=0, NotChecked=0, Total=2450 [2023-12-18 21:30:49,056 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 143 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-18 21:30:49,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 38 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-18 21:30:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-12-18 21:30:49,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 161. [2023-12-18 21:30:49,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.1625) internal successors, (186), 160 states have internal predecessors, (186), 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 21:30:49,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 186 transitions. [2023-12-18 21:30:49,112 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 186 transitions. Word has length 69 [2023-12-18 21:30:49,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:30:49,112 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 186 transitions. [2023-12-18 21:30:49,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 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 21:30:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 186 transitions. [2023-12-18 21:30:49,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-18 21:30:49,113 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:30:49,113 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:30:49,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-12-18 21:30:49,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:49,321 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:30:49,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:30:49,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1461278875, now seen corresponding path program 24 times [2023-12-18 21:30:49,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:30:49,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990782065] [2023-12-18 21:30:49,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:30:49,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:30:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:30:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 95 proven. 58 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-18 21:30:49,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:30:49,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990782065] [2023-12-18 21:30:49,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990782065] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:30:49,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248282168] [2023-12-18 21:30:49,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:30:49,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:49,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:30:49,558 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:30:49,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-18 21:30:50,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-12-18 21:30:50,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:30:50,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-18 21:30:50,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:30:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 117 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-18 21:30:50,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:30:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 117 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-18 21:30:50,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248282168] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:30:50,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:30:50,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-12-18 21:30:50,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737724471] [2023-12-18 21:30:50,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:30:50,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-18 21:30:50,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:30:50,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-18 21:30:50,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-12-18 21:30:50,639 INFO L87 Difference]: Start difference. First operand 161 states and 186 transitions. Second operand has 32 states, 32 states have (on average 2.5625) internal successors, (82), 32 states have internal predecessors, (82), 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 21:30:50,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:30:50,977 INFO L93 Difference]: Finished difference Result 251 states and 289 transitions. [2023-12-18 21:30:50,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-18 21:30:50,977 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.5625) internal successors, (82), 32 states have internal predecessors, (82), 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 71 [2023-12-18 21:30:50,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:30:50,978 INFO L225 Difference]: With dead ends: 251 [2023-12-18 21:30:50,978 INFO L226 Difference]: Without dead ends: 114 [2023-12-18 21:30:50,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 17 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 21:30:50,978 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 186 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:30:50,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 42 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:30:50,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-18 21:30:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2023-12-18 21:30:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 98 states have internal predecessors, (112), 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 21:30:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2023-12-18 21:30:51,013 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 71 [2023-12-18 21:30:51,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:30:51,013 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2023-12-18 21:30:51,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.5625) internal successors, (82), 32 states have internal predecessors, (82), 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 21:30:51,014 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2023-12-18 21:30:51,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-18 21:30:51,014 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:30:51,014 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:30:51,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-12-18 21:30:51,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-12-18 21:30:51,221 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:30:51,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:30:51,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1045957428, now seen corresponding path program 25 times [2023-12-18 21:30:51,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:30:51,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835600845] [2023-12-18 21:30:51,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:30:51,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:30:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:30:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-12-18 21:30:52,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:30:52,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835600845] [2023-12-18 21:30:52,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835600845] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:30:52,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519985088] [2023-12-18 21:30:52,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:30:52,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:30:52,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:30:52,785 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:30:52,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-18 21:30:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:30:52,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 103 conjunts are in the unsatisfiable core [2023-12-18 21:30:52,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:30:52,992 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 21:30:53,148 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 19 treesize of output 11 [2023-12-18 21:30:53,258 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 19 treesize of output 11 [2023-12-18 21:30:53,388 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 19 treesize of output 11 [2023-12-18 21:30:53,541 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 19 treesize of output 11 [2023-12-18 21:30:53,720 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 19 treesize of output 11 [2023-12-18 21:30:53,924 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 19 treesize of output 11 [2023-12-18 21:30:54,125 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 19 treesize of output 11 [2023-12-18 21:30:54,394 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 19 treesize of output 11 [2023-12-18 21:30:54,674 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 19 treesize of output 11 [2023-12-18 21:30:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-12-18 21:30:54,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:30:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-12-18 21:30:57,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519985088] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:30:57,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:30:57,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 32, 32] total 87 [2023-12-18 21:30:57,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998177931] [2023-12-18 21:30:57,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:30:57,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2023-12-18 21:30:57,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:30:57,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2023-12-18 21:30:57,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=7185, Unknown=0, NotChecked=0, Total=7482 [2023-12-18 21:30:57,721 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand has 87 states, 87 states have (on average 1.4252873563218391) internal successors, (124), 87 states have internal predecessors, (124), 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 21:31:08,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:31:08,859 INFO L93 Difference]: Finished difference Result 289 states and 336 transitions. [2023-12-18 21:31:08,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-12-18 21:31:08,860 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.4252873563218391) internal successors, (124), 87 states have internal predecessors, (124), 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 75 [2023-12-18 21:31:08,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:31:08,868 INFO L225 Difference]: With dead ends: 289 [2023-12-18 21:31:08,868 INFO L226 Difference]: Without dead ends: 275 [2023-12-18 21:31:08,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8756 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1350, Invalid=31956, Unknown=0, NotChecked=0, Total=33306 [2023-12-18 21:31:08,870 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 145 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 8372 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 8645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 8372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:31:08,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 484 Invalid, 8645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 8372 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-12-18 21:31:08,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-12-18 21:31:08,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 202. [2023-12-18 21:31:08,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.1592039800995024) internal successors, (233), 201 states have internal predecessors, (233), 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 21:31:08,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 233 transitions. [2023-12-18 21:31:08,952 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 233 transitions. Word has length 75 [2023-12-18 21:31:08,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:31:08,953 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 233 transitions. [2023-12-18 21:31:08,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.4252873563218391) internal successors, (124), 87 states have internal predecessors, (124), 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 21:31:08,953 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 233 transitions. [2023-12-18 21:31:08,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-18 21:31:08,953 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:31:08,953 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:31:08,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-12-18 21:31:09,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:31:09,159 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:31:09,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:31:09,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1304122866, now seen corresponding path program 8 times [2023-12-18 21:31:09,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:31:09,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133653079] [2023-12-18 21:31:09,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:31:09,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:31:09,174 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:31:09,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976465827] [2023-12-18 21:31:09,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:31:09,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:31:09,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:31:09,175 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:31:09,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-18 21:31:09,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:31:09,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:31:09,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-18 21:31:09,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:31:09,519 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 19 treesize of output 11 [2023-12-18 21:31:09,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:31:09,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-18 21:31:09,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:31:09,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-18 21:31:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 55 proven. 211 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 21:31:09,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:31:10,238 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 36 treesize of output 32 [2023-12-18 21:31:10,242 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 21:31:10,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 90 [2023-12-18 21:31:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 54 proven. 172 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-18 21:31:10,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:31:10,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133653079] [2023-12-18 21:31:10,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:31:10,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976465827] [2023-12-18 21:31:10,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976465827] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:31:10,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:31:10,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2023-12-18 21:31:10,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217619895] [2023-12-18 21:31:10,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:31:10,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-18 21:31:10,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:31:10,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-18 21:31:10,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 21:31:10,389 INFO L87 Difference]: Start difference. First operand 202 states and 233 transitions. Second operand has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 41 states have internal predecessors, (121), 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 21:31:11,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:31:11,026 INFO L93 Difference]: Finished difference Result 222 states and 257 transitions. [2023-12-18 21:31:11,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-18 21:31:11,027 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 41 states have internal predecessors, (121), 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 75 [2023-12-18 21:31:11,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:31:11,027 INFO L225 Difference]: With dead ends: 222 [2023-12-18 21:31:11,028 INFO L226 Difference]: Without dead ends: 210 [2023-12-18 21:31:11,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2023-12-18 21:31:11,028 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-18 21:31:11,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 123 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-18 21:31:11,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-12-18 21:31:11,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 205. [2023-12-18 21:31:11,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.1470588235294117) internal successors, (234), 204 states have internal predecessors, (234), 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 21:31:11,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 234 transitions. [2023-12-18 21:31:11,113 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 234 transitions. Word has length 75 [2023-12-18 21:31:11,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:31:11,113 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 234 transitions. [2023-12-18 21:31:11,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 41 states have internal predecessors, (121), 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 21:31:11,113 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 234 transitions. [2023-12-18 21:31:11,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-18 21:31:11,114 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:31:11,114 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:31:11,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-12-18 21:31:11,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:31:11,319 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:31:11,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:31:11,319 INFO L85 PathProgramCache]: Analyzing trace with hash 326982391, now seen corresponding path program 26 times [2023-12-18 21:31:11,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:31:11,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056430743] [2023-12-18 21:31:11,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:31:11,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:31:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:31:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 36 proven. 136 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-12-18 21:31:11,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:31:11,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056430743] [2023-12-18 21:31:11,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056430743] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:31:11,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177925669] [2023-12-18 21:31:11,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:31:11,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:31:11,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:31:11,643 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:31:11,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-18 21:31:11,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:31:11,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:31:11,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-18 21:31:11,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:31:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 45 proven. 127 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-12-18 21:31:12,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:31:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 45 proven. 127 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-12-18 21:31:12,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177925669] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:31:12,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:31:12,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-12-18 21:31:12,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100507165] [2023-12-18 21:31:12,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:31:12,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-18 21:31:12,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:31:12,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-18 21:31:12,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 21:31:12,277 INFO L87 Difference]: Start difference. First operand 205 states and 234 transitions. Second operand has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 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 21:31:13,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:31:13,065 INFO L93 Difference]: Finished difference Result 304 states and 349 transitions. [2023-12-18 21:31:13,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-18 21:31:13,066 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 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 76 [2023-12-18 21:31:13,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:31:13,066 INFO L225 Difference]: With dead ends: 304 [2023-12-18 21:31:13,067 INFO L226 Difference]: Without dead ends: 269 [2023-12-18 21:31:13,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 120 SyntacticMatches, 20 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=646, Invalid=2324, Unknown=0, NotChecked=0, Total=2970 [2023-12-18 21:31:13,067 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 163 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-18 21:31:13,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 42 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1448 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-18 21:31:13,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-12-18 21:31:13,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 173. [2023-12-18 21:31:13,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.1569767441860466) internal successors, (199), 172 states have internal predecessors, (199), 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 21:31:13,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 199 transitions. [2023-12-18 21:31:13,140 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 199 transitions. Word has length 76 [2023-12-18 21:31:13,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:31:13,140 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 199 transitions. [2023-12-18 21:31:13,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 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 21:31:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 199 transitions. [2023-12-18 21:31:13,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-18 21:31:13,141 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:31:13,141 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:31:13,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-12-18 21:31:13,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-12-18 21:31:13,348 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:31:13,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:31:13,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1669043973, now seen corresponding path program 27 times [2023-12-18 21:31:13,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:31:13,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688220035] [2023-12-18 21:31:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:31:13,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:31:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:31:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 120 proven. 70 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-12-18 21:31:13,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:31:13,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688220035] [2023-12-18 21:31:13,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688220035] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:31:13,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959540011] [2023-12-18 21:31:13,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:31:13,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:31:13,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:31:13,597 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:31:13,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-12-18 21:31:14,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-18 21:31:14,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:31:14,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-18 21:31:14,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:31:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 170 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-18 21:31:14,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:31:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 145 proven. 70 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-18 21:31:14,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959540011] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:31:14,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:31:14,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 25] total 39 [2023-12-18 21:31:14,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339272647] [2023-12-18 21:31:14,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:31:14,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-18 21:31:14,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:31:14,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-18 21:31:14,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2023-12-18 21:31:14,669 INFO L87 Difference]: Start difference. First operand 173 states and 199 transitions. Second operand has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 39 states have internal predecessors, (97), 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 21:31:15,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:31:15,146 INFO L93 Difference]: Finished difference Result 276 states and 317 transitions. [2023-12-18 21:31:15,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-18 21:31:15,146 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 39 states have internal predecessors, (97), 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 78 [2023-12-18 21:31:15,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:31:15,147 INFO L225 Difference]: With dead ends: 276 [2023-12-18 21:31:15,147 INFO L226 Difference]: Without dead ends: 125 [2023-12-18 21:31:15,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 120 SyntacticMatches, 20 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=796, Invalid=2510, Unknown=0, NotChecked=0, Total=3306 [2023-12-18 21:31:15,147 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 284 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:31:15,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 30 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:31:15,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-12-18 21:31:15,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 106. [2023-12-18 21:31:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1428571428571428) internal successors, (120), 105 states have internal predecessors, (120), 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 21:31:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 120 transitions. [2023-12-18 21:31:15,211 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 120 transitions. Word has length 78 [2023-12-18 21:31:15,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:31:15,211 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 120 transitions. [2023-12-18 21:31:15,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 39 states have internal predecessors, (97), 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 21:31:15,211 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 120 transitions. [2023-12-18 21:31:15,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-18 21:31:15,212 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:31:15,212 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:31:15,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-12-18 21:31:15,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-12-18 21:31:15,412 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:31:15,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:31:15,412 INFO L85 PathProgramCache]: Analyzing trace with hash -217908898, now seen corresponding path program 28 times [2023-12-18 21:31:15,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:31:15,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963146245] [2023-12-18 21:31:15,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:31:15,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:31:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:31:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-18 21:31:17,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:31:17,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963146245] [2023-12-18 21:31:17,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963146245] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:31:17,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301575227] [2023-12-18 21:31:17,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:31:17,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:31:17,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:31:17,258 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:31:17,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-18 21:31:17,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:31:17,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:31:17,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 113 conjunts are in the unsatisfiable core [2023-12-18 21:31:17,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:31:17,877 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 21:31:19,043 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 19 treesize of output 11 [2023-12-18 21:31:19,190 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 19 treesize of output 11 [2023-12-18 21:31:19,359 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 19 treesize of output 11 [2023-12-18 21:31:19,544 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 19 treesize of output 11 [2023-12-18 21:31:19,760 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 19 treesize of output 11 [2023-12-18 21:31:19,999 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 19 treesize of output 11 [2023-12-18 21:31:20,275 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 19 treesize of output 11 [2023-12-18 21:31:20,562 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 19 treesize of output 11 [2023-12-18 21:31:20,904 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 19 treesize of output 11 [2023-12-18 21:31:21,234 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 19 treesize of output 11 [2023-12-18 21:31:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 117 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:31:21,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:31:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 145 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:31:26,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301575227] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:31:26,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:31:26,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 46] total 129 [2023-12-18 21:31:26,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293310140] [2023-12-18 21:31:26,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:31:26,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2023-12-18 21:31:26,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:31:26,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2023-12-18 21:31:26,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=890, Invalid=15622, Unknown=0, NotChecked=0, Total=16512 [2023-12-18 21:31:26,963 INFO L87 Difference]: Start difference. First operand 106 states and 120 transitions. Second operand has 129 states, 129 states have (on average 1.573643410852713) internal successors, (203), 129 states have internal predecessors, (203), 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 21:31:46,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:31:46,787 INFO L93 Difference]: Finished difference Result 456 states and 528 transitions. [2023-12-18 21:31:46,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2023-12-18 21:31:46,787 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.573643410852713) internal successors, (203), 129 states have internal predecessors, (203), 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 82 [2023-12-18 21:31:46,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:31:46,789 INFO L225 Difference]: With dead ends: 456 [2023-12-18 21:31:46,789 INFO L226 Difference]: Without dead ends: 440 [2023-12-18 21:31:46,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23295 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=4043, Invalid=75763, Unknown=0, NotChecked=0, Total=79806 [2023-12-18 21:31:46,792 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 376 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 9456 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 10122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 9456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:31:46,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 834 Invalid, 10122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 9456 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-12-18 21:31:46,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2023-12-18 21:31:46,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 247. [2023-12-18 21:31:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.2073170731707317) internal successors, (297), 246 states have internal predecessors, (297), 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 21:31:46,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 297 transitions. [2023-12-18 21:31:46,910 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 297 transitions. Word has length 82 [2023-12-18 21:31:46,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:31:46,911 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 297 transitions. [2023-12-18 21:31:46,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.573643410852713) internal successors, (203), 129 states have internal predecessors, (203), 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 21:31:46,911 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 297 transitions. [2023-12-18 21:31:46,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-18 21:31:46,911 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:31:46,911 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:31:46,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-12-18 21:31:47,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-12-18 21:31:47,119 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:31:47,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:31:47,119 INFO L85 PathProgramCache]: Analyzing trace with hash 40256540, now seen corresponding path program 9 times [2023-12-18 21:31:47,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:31:47,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798228040] [2023-12-18 21:31:47,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:31:47,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:31:47,136 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:31:47,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270154561] [2023-12-18 21:31:47,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:31:47,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:31:47,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:31:47,138 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:31:47,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-18 21:31:47,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-18 21:31:47,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:31:47,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-18 21:31:47,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:31:47,505 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 27 treesize of output 15 [2023-12-18 21:31:47,521 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 36 treesize of output 16 [2023-12-18 21:31:47,547 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 36 treesize of output 16 [2023-12-18 21:31:47,613 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:31:47,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-12-18 21:31:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 66 proven. 84 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2023-12-18 21:31:47,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:31:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 66 proven. 84 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2023-12-18 21:31:47,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:31:47,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798228040] [2023-12-18 21:31:47,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:31:47,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270154561] [2023-12-18 21:31:47,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270154561] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:31:47,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:31:47,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2023-12-18 21:31:47,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195635523] [2023-12-18 21:31:47,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:31:47,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-18 21:31:47,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:31:47,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-18 21:31:47,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-12-18 21:31:47,818 INFO L87 Difference]: Start difference. First operand 247 states and 297 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 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 21:31:49,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:31:49,459 INFO L93 Difference]: Finished difference Result 482 states and 587 transitions. [2023-12-18 21:31:49,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-18 21:31:49,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 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 82 [2023-12-18 21:31:49,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:31:49,460 INFO L225 Difference]: With dead ends: 482 [2023-12-18 21:31:49,461 INFO L226 Difference]: Without dead ends: 478 [2023-12-18 21:31:49,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 144 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=502, Invalid=2578, Unknown=0, NotChecked=0, Total=3080 [2023-12-18 21:31:49,462 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-18 21:31:49,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 42 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 440 Invalid, 1 Unknown, 0 Unchecked, 0.9s Time] [2023-12-18 21:31:49,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2023-12-18 21:31:49,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 368. [2023-12-18 21:31:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.2479564032697548) internal successors, (458), 367 states have internal predecessors, (458), 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 21:31:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 458 transitions. [2023-12-18 21:31:49,690 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 458 transitions. Word has length 82 [2023-12-18 21:31:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:31:49,690 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 458 transitions. [2023-12-18 21:31:49,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 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 21:31:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 458 transitions. [2023-12-18 21:31:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-18 21:31:49,691 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:31:49,691 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:31:49,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-12-18 21:31:49,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:31:49,897 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:31:49,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:31:49,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1751386053, now seen corresponding path program 29 times [2023-12-18 21:31:49,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:31:49,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571868790] [2023-12-18 21:31:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:31:49,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:31:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:31:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 45 proven. 166 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-18 21:31:50,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:31:50,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571868790] [2023-12-18 21:31:50,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571868790] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:31:50,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845395455] [2023-12-18 21:31:50,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:31:50,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:31:50,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:31:50,255 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:31:50,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-18 21:32:56,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-12-18 21:32:56,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:32:56,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-18 21:32:56,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:32:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 55 proven. 156 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-18 21:32:56,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:32:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 55 proven. 156 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-18 21:32:57,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845395455] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:32:57,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:32:57,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-12-18 21:32:57,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240636937] [2023-12-18 21:32:57,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:32:57,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-18 21:32:57,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:32:57,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-18 21:32:57,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2023-12-18 21:32:57,183 INFO L87 Difference]: Start difference. First operand 368 states and 458 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:32:58,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:32:58,260 INFO L93 Difference]: Finished difference Result 526 states and 649 transitions. [2023-12-18 21:32:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-18 21:32:58,260 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2023-12-18 21:32:58,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:32:58,261 INFO L225 Difference]: With dead ends: 526 [2023-12-18 21:32:58,261 INFO L226 Difference]: Without dead ends: 488 [2023-12-18 21:32:58,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 131 SyntacticMatches, 22 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=764, Invalid=2776, Unknown=0, NotChecked=0, Total=3540 [2023-12-18 21:32:58,262 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 232 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-18 21:32:58,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 40 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-18 21:32:58,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2023-12-18 21:32:58,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 318. [2023-12-18 21:32:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.2649842271293374) internal successors, (401), 317 states have internal predecessors, (401), 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 21:32:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 401 transitions. [2023-12-18 21:32:58,410 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 401 transitions. Word has length 83 [2023-12-18 21:32:58,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:32:58,410 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 401 transitions. [2023-12-18 21:32:58,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:32:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 401 transitions. [2023-12-18 21:32:58,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-18 21:32:58,410 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:32:58,410 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:32:58,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-12-18 21:32:58,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-12-18 21:32:58,626 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:32:58,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:32:58,626 INFO L85 PathProgramCache]: Analyzing trace with hash -489357157, now seen corresponding path program 30 times [2023-12-18 21:32:58,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:32:58,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529095510] [2023-12-18 21:32:58,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:32:58,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:32:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:32:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 148 proven. 83 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-18 21:32:58,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:32:58,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529095510] [2023-12-18 21:32:58,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529095510] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:32:58,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895536507] [2023-12-18 21:32:58,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:32:58,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:32:58,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:32:58,987 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:32:58,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-12-18 21:32:59,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-12-18 21:32:59,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:32:59,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-18 21:32:59,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:33:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 204 proven. 55 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-12-18 21:33:00,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:33:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 176 proven. 83 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-12-18 21:33:00,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895536507] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:33:00,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:33:00,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27, 27] total 42 [2023-12-18 21:33:00,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628880852] [2023-12-18 21:33:00,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:33:00,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-18 21:33:00,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:33:00,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-18 21:33:00,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2023-12-18 21:33:00,449 INFO L87 Difference]: Start difference. First operand 318 states and 401 transitions. Second operand has 42 states, 42 states have (on average 2.4761904761904763) internal successors, (104), 42 states have internal predecessors, (104), 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 21:33:01,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:33:01,052 INFO L93 Difference]: Finished difference Result 498 states and 616 transitions. [2023-12-18 21:33:01,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-18 21:33:01,052 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4761904761904763) internal successors, (104), 42 states have internal predecessors, (104), 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 85 [2023-12-18 21:33:01,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:33:01,053 INFO L225 Difference]: With dead ends: 498 [2023-12-18 21:33:01,053 INFO L226 Difference]: Without dead ends: 199 [2023-12-18 21:33:01,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 131 SyntacticMatches, 22 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=928, Invalid=2978, Unknown=0, NotChecked=0, Total=3906 [2023-12-18 21:33:01,053 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 329 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 21:33:01,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 40 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 21:33:01,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-12-18 21:33:01,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 151. [2023-12-18 21:33:01,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.1866666666666668) internal successors, (178), 150 states have internal predecessors, (178), 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 21:33:01,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 178 transitions. [2023-12-18 21:33:01,130 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 178 transitions. Word has length 85 [2023-12-18 21:33:01,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:33:01,130 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 178 transitions. [2023-12-18 21:33:01,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.4761904761904763) internal successors, (104), 42 states have internal predecessors, (104), 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 21:33:01,130 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 178 transitions. [2023-12-18 21:33:01,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-18 21:33:01,130 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:33:01,130 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:33:01,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-12-18 21:33:01,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-12-18 21:33:01,337 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:33:01,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:33:01,337 INFO L85 PathProgramCache]: Analyzing trace with hash 27551156, now seen corresponding path program 31 times [2023-12-18 21:33:01,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:33:01,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664566202] [2023-12-18 21:33:01,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:33:01,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:33:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:33:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-18 21:33:03,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:33:03,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664566202] [2023-12-18 21:33:03,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664566202] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:33:03,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973860944] [2023-12-18 21:33:03,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:33:03,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:33:03,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:33:03,396 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:33:03,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-12-18 21:33:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:33:03,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 123 conjunts are in the unsatisfiable core [2023-12-18 21:33:03,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:33:03,690 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 21:33:03,842 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 19 treesize of output 11 [2023-12-18 21:33:03,957 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 19 treesize of output 11 [2023-12-18 21:33:04,096 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 19 treesize of output 11 [2023-12-18 21:33:04,278 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 19 treesize of output 11 [2023-12-18 21:33:04,485 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 19 treesize of output 11 [2023-12-18 21:33:04,733 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 19 treesize of output 11 [2023-12-18 21:33:05,003 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 19 treesize of output 11 [2023-12-18 21:33:05,269 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 19 treesize of output 11 [2023-12-18 21:33:05,685 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 19 treesize of output 11 [2023-12-18 21:33:06,062 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 19 treesize of output 11 [2023-12-18 21:33:06,428 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 19 treesize of output 11 [2023-12-18 21:33:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-18 21:33:06,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:33:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-18 21:33:11,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973860944] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:33:11,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:33:11,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 38, 38] total 105 [2023-12-18 21:33:11,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177394129] [2023-12-18 21:33:11,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:33:11,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-12-18 21:33:11,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:33:11,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-12-18 21:33:11,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=10559, Unknown=0, NotChecked=0, Total=10920 [2023-12-18 21:33:11,282 INFO L87 Difference]: Start difference. First operand 151 states and 178 transitions. Second operand has 105 states, 105 states have (on average 1.3904761904761904) internal successors, (146), 105 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 21:33:29,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:33:29,739 INFO L93 Difference]: Finished difference Result 529 states and 637 transitions. [2023-12-18 21:33:29,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2023-12-18 21:33:29,740 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.3904761904761904) internal successors, (146), 105 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) Word has length 89 [2023-12-18 21:33:29,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:33:29,741 INFO L225 Difference]: With dead ends: 529 [2023-12-18 21:33:29,741 INFO L226 Difference]: Without dead ends: 504 [2023-12-18 21:33:29,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13512 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=1688, Invalid=48712, Unknown=0, NotChecked=0, Total=50400 [2023-12-18 21:33:29,743 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 170 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 11964 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 12307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 11964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:33:29,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 570 Invalid, 12307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 11964 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-12-18 21:33:29,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-12-18 21:33:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 332. [2023-12-18 21:33:29,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.1963746223564955) internal successors, (396), 331 states have internal predecessors, (396), 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 21:33:29,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 396 transitions. [2023-12-18 21:33:29,947 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 396 transitions. Word has length 89 [2023-12-18 21:33:29,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:33:29,947 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 396 transitions. [2023-12-18 21:33:29,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.3904761904761904) internal successors, (146), 105 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 21:33:29,948 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 396 transitions. [2023-12-18 21:33:29,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-18 21:33:29,948 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:33:29,948 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:33:29,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-12-18 21:33:30,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:33:30,150 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:33:30,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:33:30,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1252312522, now seen corresponding path program 10 times [2023-12-18 21:33:30,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:33:30,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666311228] [2023-12-18 21:33:30,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:33:30,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:33:30,167 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:33:30,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125827093] [2023-12-18 21:33:30,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:33:30,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:33:30,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:33:30,169 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:33:30,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-12-18 21:33:30,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:33:30,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:33:30,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-18 21:33:30,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:33:30,517 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 23 treesize of output 13 [2023-12-18 21:33:30,552 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-12-18 21:33:30,552 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 1 case distinctions, treesize of input 33 treesize of output 13 [2023-12-18 21:33:30,580 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-12-18 21:33:30,580 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 1 case distinctions, treesize of input 33 treesize of output 13 [2023-12-18 21:33:30,608 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-12-18 21:33:30,609 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 1 case distinctions, treesize of input 33 treesize of output 13 [2023-12-18 21:33:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 91 proven. 246 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-18 21:33:30,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:33:31,463 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1422| Int)) (or (forall ((v_ArrVal_4273 Int)) (= 3 (select (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_1422| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_4273) (+ 28 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (< |v_ULTIMATE.start_main_~i~0#1_1422| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2023-12-18 21:33:31,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2023-12-18 21:33:31,585 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 21:33:31,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 21 [2023-12-18 21:33:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 86 proven. 238 refuted. 0 times theorem prover too weak. 84 trivial. 10 not checked. [2023-12-18 21:33:31,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:33:31,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666311228] [2023-12-18 21:33:31,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:33:31,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125827093] [2023-12-18 21:33:31,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125827093] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:33:31,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:33:31,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 36 [2023-12-18 21:33:31,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581901824] [2023-12-18 21:33:31,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:33:31,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-18 21:33:31,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:33:31,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-18 21:33:31,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1073, Unknown=1, NotChecked=66, Total=1260 [2023-12-18 21:33:31,608 INFO L87 Difference]: Start difference. First operand 332 states and 396 transitions. Second operand has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 36 states have internal predecessors, (103), 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 21:33:32,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:33:32,660 INFO L93 Difference]: Finished difference Result 391 states and 470 transitions. [2023-12-18 21:33:32,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-18 21:33:32,660 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 36 states have internal predecessors, (103), 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 89 [2023-12-18 21:33:32,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:33:32,661 INFO L225 Difference]: With dead ends: 391 [2023-12-18 21:33:32,661 INFO L226 Difference]: Without dead ends: 365 [2023-12-18 21:33:32,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=1135, Unknown=1, NotChecked=68, Total=1332 [2023-12-18 21:33:32,662 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 49 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-18 21:33:32,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 113 Invalid, 1978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1865 Invalid, 0 Unknown, 92 Unchecked, 0.7s Time] [2023-12-18 21:33:32,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-12-18 21:33:32,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 335. [2023-12-18 21:33:32,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.1796407185628743) internal successors, (394), 334 states have internal predecessors, (394), 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 21:33:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 394 transitions. [2023-12-18 21:33:32,882 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 394 transitions. Word has length 89 [2023-12-18 21:33:32,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:33:32,882 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 394 transitions. [2023-12-18 21:33:32,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 36 states have internal predecessors, (103), 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 21:33:32,882 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 394 transitions. [2023-12-18 21:33:32,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-18 21:33:32,883 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:33:32,883 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:33:32,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-12-18 21:33:33,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-12-18 21:33:33,089 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:33:33,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:33:33,090 INFO L85 PathProgramCache]: Analyzing trace with hash -67371788, now seen corresponding path program 8 times [2023-12-18 21:33:33,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:33:33,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438785327] [2023-12-18 21:33:33,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:33:33,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:33:33,105 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:33:33,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197056101] [2023-12-18 21:33:33,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:33:33,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:33:33,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:33:33,107 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:33:33,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-12-18 21:33:33,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:33:33,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:33:33,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 89 conjunts are in the unsatisfiable core [2023-12-18 21:33:33,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:33:33,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:33:33,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-18 21:33:33,498 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:33:33,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-18 21:33:33,560 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:33:33,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2023-12-18 21:33:33,601 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:33:33,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2023-12-18 21:33:33,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:33:33,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2023-12-18 21:33:33,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:33:33,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2023-12-18 21:33:33,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:33:33,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2023-12-18 21:33:33,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:33:33,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2023-12-18 21:33:33,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:33:33,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2023-12-18 21:33:33,863 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:33:33,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2023-12-18 21:33:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 69 proven. 166 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2023-12-18 21:33:33,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:33:34,197 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 32 treesize of output 30 [2023-12-18 21:33:34,198 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 34 treesize of output 30 [2023-12-18 21:33:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 72 proven. 163 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2023-12-18 21:33:34,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:33:34,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438785327] [2023-12-18 21:33:34,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:33:34,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197056101] [2023-12-18 21:33:34,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197056101] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:33:34,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:33:34,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2023-12-18 21:33:34,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707788708] [2023-12-18 21:33:34,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:33:34,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-18 21:33:34,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:33:34,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-18 21:33:34,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1845, Unknown=0, NotChecked=0, Total=2070 [2023-12-18 21:33:34,453 INFO L87 Difference]: Start difference. First operand 335 states and 394 transitions. Second operand has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 46 states have internal predecessors, (96), 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 21:33:35,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:33:35,715 INFO L93 Difference]: Finished difference Result 564 states and 676 transitions. [2023-12-18 21:33:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-18 21:33:35,715 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 46 states have internal predecessors, (96), 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 89 [2023-12-18 21:33:35,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:33:35,717 INFO L225 Difference]: With dead ends: 564 [2023-12-18 21:33:35,717 INFO L226 Difference]: Without dead ends: 346 [2023-12-18 21:33:35,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=337, Invalid=3203, Unknown=0, NotChecked=0, Total=3540 [2023-12-18 21:33:35,718 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-18 21:33:35,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 138 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1763 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-18 21:33:35,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-12-18 21:33:35,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 337. [2023-12-18 21:33:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.1666666666666667) internal successors, (392), 336 states have internal predecessors, (392), 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 21:33:35,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 392 transitions. [2023-12-18 21:33:35,936 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 392 transitions. Word has length 89 [2023-12-18 21:33:35,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:33:35,936 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 392 transitions. [2023-12-18 21:33:35,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 46 states have internal predecessors, (96), 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 21:33:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 392 transitions. [2023-12-18 21:33:35,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-18 21:33:35,937 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:33:35,937 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:33:35,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-12-18 21:33:36,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:33:36,142 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:33:36,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:33:36,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1711971273, now seen corresponding path program 32 times [2023-12-18 21:33:36,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:33:36,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584298900] [2023-12-18 21:33:36,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:33:36,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:33:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:33:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 55 proven. 199 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-18 21:33:36,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:33:36,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584298900] [2023-12-18 21:33:36,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584298900] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:33:36,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453983819] [2023-12-18 21:33:36,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:33:36,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:33:36,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:33:36,528 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:33:36,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-12-18 21:33:36,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:33:36,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:33:36,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-18 21:33:36,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:33:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 66 proven. 188 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-18 21:33:37,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:33:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 66 proven. 188 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-18 21:33:37,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453983819] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:33:37,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:33:37,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-12-18 21:33:37,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29982467] [2023-12-18 21:33:37,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:33:37,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-18 21:33:37,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:33:37,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-18 21:33:37,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 21:33:37,331 INFO L87 Difference]: Start difference. First operand 337 states and 392 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 41 states have internal predecessors, (101), 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 21:33:38,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:33:38,526 INFO L93 Difference]: Finished difference Result 481 states and 563 transitions. [2023-12-18 21:33:38,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-18 21:33:38,527 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-12-18 21:33:38,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:33:38,528 INFO L225 Difference]: With dead ends: 481 [2023-12-18 21:33:38,528 INFO L226 Difference]: Without dead ends: 440 [2023-12-18 21:33:38,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 142 SyntacticMatches, 24 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1706 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=892, Invalid=3268, Unknown=0, NotChecked=0, Total=4160 [2023-12-18 21:33:38,528 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 196 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-18 21:33:38,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 40 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1595 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-18 21:33:38,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2023-12-18 21:33:38,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 280. [2023-12-18 21:33:38,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.1720430107526882) internal successors, (327), 279 states have internal predecessors, (327), 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 21:33:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 327 transitions. [2023-12-18 21:33:38,688 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 327 transitions. Word has length 90 [2023-12-18 21:33:38,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:33:38,688 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 327 transitions. [2023-12-18 21:33:38,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 41 states have internal predecessors, (101), 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 21:33:38,688 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 327 transitions. [2023-12-18 21:33:38,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-18 21:33:38,689 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:33:38,689 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:33:38,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-12-18 21:33:38,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-12-18 21:33:38,895 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:33:38,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:33:38,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1976773765, now seen corresponding path program 33 times [2023-12-18 21:33:38,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:33:38,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956583037] [2023-12-18 21:33:38,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:33:38,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:33:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:33:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 179 proven. 97 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-18 21:33:39,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:33:39,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956583037] [2023-12-18 21:33:39,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956583037] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:33:39,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782255976] [2023-12-18 21:33:39,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:33:39,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:33:39,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:33:39,348 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:33:39,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-12-18 21:33:40,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-12-18 21:33:40,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:33:40,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-18 21:33:40,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:33:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 210 proven. 66 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-18 21:33:40,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:33:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 210 proven. 66 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-18 21:33:41,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782255976] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:33:41,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:33:41,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-12-18 21:33:41,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499738125] [2023-12-18 21:33:41,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:33:41,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-18 21:33:41,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:33:41,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-18 21:33:41,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 21:33:41,120 INFO L87 Difference]: Start difference. First operand 280 states and 327 transitions. Second operand has 41 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 41 states have internal predecessors, (103), 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 21:33:41,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:33:41,650 INFO L93 Difference]: Finished difference Result 450 states and 527 transitions. [2023-12-18 21:33:41,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-18 21:33:41,651 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 41 states have internal predecessors, (103), 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 92 [2023-12-18 21:33:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:33:41,651 INFO L225 Difference]: With dead ends: 450 [2023-12-18 21:33:41,651 INFO L226 Difference]: Without dead ends: 198 [2023-12-18 21:33:41,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 147 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2023-12-18 21:33:41,652 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 262 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 21:33:41,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 45 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 21:33:41,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-12-18 21:33:41,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 161. [2023-12-18 21:33:41,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.1625) internal successors, (186), 160 states have internal predecessors, (186), 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 21:33:41,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 186 transitions. [2023-12-18 21:33:41,740 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 186 transitions. Word has length 92 [2023-12-18 21:33:41,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:33:41,740 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 186 transitions. [2023-12-18 21:33:41,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 41 states have internal predecessors, (103), 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 21:33:41,740 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 186 transitions. [2023-12-18 21:33:41,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-18 21:33:41,740 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:33:41,740 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:33:41,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-12-18 21:33:41,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-12-18 21:33:41,941 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:33:41,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:33:41,941 INFO L85 PathProgramCache]: Analyzing trace with hash -769785506, now seen corresponding path program 34 times [2023-12-18 21:33:41,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:33:41,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596594241] [2023-12-18 21:33:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:33:41,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:33:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:33:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-12-18 21:33:44,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:33:44,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596594241] [2023-12-18 21:33:44,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596594241] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:33:44,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471267989] [2023-12-18 21:33:44,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:33:44,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:33:44,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:33:44,231 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:33:44,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-12-18 21:33:45,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:33:45,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:33:45,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 133 conjunts are in the unsatisfiable core [2023-12-18 21:33:45,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:33:45,168 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 21:33:45,359 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 19 treesize of output 11 [2023-12-18 21:33:45,482 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 19 treesize of output 11 [2023-12-18 21:33:45,631 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 19 treesize of output 11 [2023-12-18 21:33:45,793 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 19 treesize of output 11 [2023-12-18 21:33:46,012 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 19 treesize of output 11 [2023-12-18 21:33:46,217 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 19 treesize of output 11 [2023-12-18 21:33:46,455 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 19 treesize of output 11 [2023-12-18 21:33:46,720 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 19 treesize of output 11 [2023-12-18 21:33:47,007 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 19 treesize of output 11 [2023-12-18 21:33:47,333 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 19 treesize of output 11 [2023-12-18 21:33:47,681 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 19 treesize of output 11 [2023-12-18 21:33:48,091 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 19 treesize of output 11 [2023-12-18 21:33:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-12-18 21:33:48,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:33:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-12-18 21:33:54,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471267989] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:33:54,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:33:54,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 41, 41] total 114 [2023-12-18 21:33:54,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226627612] [2023-12-18 21:33:54,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:33:54,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2023-12-18 21:33:54,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:33:54,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2023-12-18 21:33:54,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=12489, Unknown=0, NotChecked=0, Total=12882 [2023-12-18 21:33:54,232 INFO L87 Difference]: Start difference. First operand 161 states and 186 transitions. Second operand has 114 states, 114 states have (on average 1.3771929824561404) internal successors, (157), 114 states have internal predecessors, (157), 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 21:34:18,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:18,200 INFO L93 Difference]: Finished difference Result 552 states and 652 transitions. [2023-12-18 21:34:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2023-12-18 21:34:18,201 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.3771929824561404) internal successors, (157), 114 states have internal predecessors, (157), 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 96 [2023-12-18 21:34:18,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:18,202 INFO L225 Difference]: With dead ends: 552 [2023-12-18 21:34:18,202 INFO L226 Difference]: Without dead ends: 527 [2023-12-18 21:34:18,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16277 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=1857, Invalid=58413, Unknown=0, NotChecked=0, Total=60270 [2023-12-18 21:34:18,229 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 147 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 14859 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 15245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 14859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:18,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 662 Invalid, 15245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 14859 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2023-12-18 21:34:18,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2023-12-18 21:34:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 357. [2023-12-18 21:34:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.1713483146067416) internal successors, (417), 356 states have internal predecessors, (417), 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 21:34:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 417 transitions. [2023-12-18 21:34:18,487 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 417 transitions. Word has length 96 [2023-12-18 21:34:18,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:18,487 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 417 transitions. [2023-12-18 21:34:18,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.3771929824561404) internal successors, (157), 114 states have internal predecessors, (157), 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 21:34:18,487 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 417 transitions. [2023-12-18 21:34:18,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-18 21:34:18,488 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:18,488 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:18,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-12-18 21:34:18,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:18,697 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:18,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:18,697 INFO L85 PathProgramCache]: Analyzing trace with hash -2049649184, now seen corresponding path program 11 times [2023-12-18 21:34:18,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:18,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879098729] [2023-12-18 21:34:18,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:18,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:18,715 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:34:18,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650788519] [2023-12-18 21:34:18,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:34:18,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:18,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:18,721 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:34:18,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process Received shutdown request... [2023-12-18 21:43:10,233 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 21:43:10,263 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 21:43:11,434 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forcibly destroying the process [2023-12-18 21:43:11,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 137 [2023-12-18 21:43:11,461 ERROR L246 FreeRefinementEngine]: Caught known exception: Timeout or Toolchain cancelled by user [2023-12-18 21:43:11,463 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 21:43:11,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2023-12-18 21:43:11,464 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 97 with TraceHistMax 12,while AutomatonFreeRefinementEngine was Timeout during CAMEL. [2023-12-18 21:43:11,464 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-18 21:43:11,471 INFO L445 BasicCegarLoop]: Path program histogram: [34, 11, 8, 1, 1, 1, 1] [2023-12-18 21:43:11,472 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 21:43:11,473 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 09:43:11 BoogieIcfgContainer [2023-12-18 21:43:11,473 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 21:43:11,473 INFO L158 Benchmark]: Toolchain (without parser) took 870607.44ms. Allocated memory was 196.1MB in the beginning and 733.0MB in the end (delta: 536.9MB). Free memory was 133.2MB in the beginning and 403.3MB in the end (delta: -270.1MB). Peak memory consumption was 267.5MB. Max. memory is 8.0GB. [2023-12-18 21:43:11,473 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 196.1MB. Free memory was 146.2MB in the beginning and 146.0MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 21:43:11,473 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.42ms. Allocated memory is still 196.1MB. Free memory was 132.9MB in the beginning and 121.6MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 21:43:11,474 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.81ms. Allocated memory is still 196.1MB. Free memory was 121.6MB in the beginning and 119.7MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 21:43:11,474 INFO L158 Benchmark]: Boogie Preprocessor took 33.07ms. Allocated memory is still 196.1MB. Free memory was 119.7MB in the beginning and 117.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 21:43:11,474 INFO L158 Benchmark]: RCFGBuilder took 359.87ms. Allocated memory is still 196.1MB. Free memory was 117.6MB in the beginning and 103.9MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-18 21:43:11,474 INFO L158 Benchmark]: TraceAbstraction took 869966.65ms. Allocated memory was 238.0MB in the beginning and 733.0MB in the end (delta: 494.9MB). Free memory was 203.8MB in the beginning and 403.3MB in the end (delta: -199.5MB). Peak memory consumption was 295.0MB. Max. memory is 8.0GB. [2023-12-18 21:43:11,474 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 196.1MB. Free memory was 146.2MB in the beginning and 146.0MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 191.42ms. Allocated memory is still 196.1MB. Free memory was 132.9MB in the beginning and 121.6MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 37.81ms. Allocated memory is still 196.1MB. Free memory was 121.6MB in the beginning and 119.7MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.07ms. Allocated memory is still 196.1MB. Free memory was 119.7MB in the beginning and 117.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 359.87ms. Allocated memory is still 196.1MB. Free memory was 117.6MB in the beginning and 103.9MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 869966.65ms. Allocated memory was 238.0MB in the beginning and 733.0MB in the end (delta: 494.9MB). Free memory was 203.8MB in the beginning and 403.3MB in the end (delta: -199.5MB). Peak memory consumption was 295.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 15]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 15). Cancelled while NwaCegarLoop was analyzing trace of length 97 with TraceHistMax 12,while AutomatonFreeRefinementEngine was Timeout during CAMEL. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 869.9s, OverallIterations: 57, TraceHistogramMax: 12, PathProgramHistogramMax: 34, EmptinessCheckTime: 0.0s, AutomataDifference: 124.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 6459 SdHoareTripleChecker+Valid, 55.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6459 mSDsluCounter, 7155 SdHoareTripleChecker+Invalid, 48.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 92 IncrementalHoareTripleChecker+Unchecked, 6558 mSDsCounter, 4610 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 94446 IncrementalHoareTripleChecker+Invalid, 99149 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4610 mSolverCounterUnsat, 597 mSDtfsCounter, 94446 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7949 GetRequests, 4426 SyntacticMatches, 325 SemanticMatches, 3198 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 110986 ImplicationChecksByTransitivity, 152.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=368occurred in iteration=48, InterpolantAutomatonStates: 2096, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.3s AutomataMinimizationTime, 56 MinimizatonAttempts, 2796 StatesRemovedByMinimization, 54 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 76.7s SatisfiabilityAnalysisTime, 114.3s InterpolantComputationTime, 4899 NumberOfCodeBlocks, 4841 NumberOfCodeBlocksAsserted, 249 NumberOfCheckSat, 7708 ConstructedInterpolants, 469 QuantifiedInterpolants, 75088 SizeOfPredicates, 561 NumberOfNonLiveVariables, 13949 ConjunctsInSsa, 2019 ConjunctsInUnsatCore, 144 InterpolantComputations, 2 PerfectInterpolantSequences, 13591/23698 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown