/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-crafted/zero_sum_const_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 19:37:05,180 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 19:37:05,242 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 19:37:05,246 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 19:37:05,246 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 19:37:05,266 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 19:37:05,267 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 19:37:05,267 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 19:37:05,268 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 19:37:05,271 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 19:37:05,271 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 19:37:05,272 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 19:37:05,272 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 19:37:05,273 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 19:37:05,273 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 19:37:05,273 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 19:37:05,273 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 19:37:05,274 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 19:37:05,274 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 19:37:05,274 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 19:37:05,274 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 19:37:05,275 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 19:37:05,275 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 19:37:05,275 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 19:37:05,275 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 19:37:05,275 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 19:37:05,275 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 19:37:05,275 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 19:37:05,276 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 19:37:05,276 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 19:37:05,277 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 19:37:05,277 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 19:37:05,277 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 19:37:05,277 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 19:37:05,277 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 19:37:05,277 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 19:37:05,278 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 19:37:05,278 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 19:37:05,278 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 19:37:05,278 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 19:37:05,278 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 19:37:05,278 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 19:37:05,278 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 19:37:05,278 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 19:37:05,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 19:37:05,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 19:37:05,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 19:37:05,469 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 19:37:05,469 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 19:37:05,470 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2023-12-18 19:37:06,572 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 19:37:06,728 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 19:37:06,728 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2023-12-18 19:37:06,733 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c91d0cd0/96be42d219664af49bada5d31986ca45/FLAG40c672d8a [2023-12-18 19:37:06,748 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c91d0cd0/96be42d219664af49bada5d31986ca45 [2023-12-18 19:37:06,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 19:37:06,751 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 19:37:06,753 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 19:37:06,753 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 19:37:06,756 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 19:37:06,757 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:37:06" (1/1) ... [2023-12-18 19:37:06,758 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45981339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:37:06, skipping insertion in model container [2023-12-18 19:37:06,758 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:37:06" (1/1) ... [2023-12-18 19:37:06,773 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 19:37:06,890 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-crafted/zero_sum_const_m2.c[408,421] [2023-12-18 19:37:06,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 19:37:06,909 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 19:37:06,918 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-crafted/zero_sum_const_m2.c[408,421] [2023-12-18 19:37:06,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 19:37:06,933 INFO L206 MainTranslator]: Completed translation [2023-12-18 19:37:06,933 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:37:06 WrapperNode [2023-12-18 19:37:06,934 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 19:37:06,934 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 19:37:06,934 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 19:37:06,934 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 19:37:06,939 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:37:06" (1/1) ... [2023-12-18 19:37:06,945 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:37:06" (1/1) ... [2023-12-18 19:37:06,961 INFO L138 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2023-12-18 19:37:06,961 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 19:37:06,961 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 19:37:06,962 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 19:37:06,962 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 19:37:06,969 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:37:06" (1/1) ... [2023-12-18 19:37:06,969 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:37:06" (1/1) ... [2023-12-18 19:37:06,977 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:37:06" (1/1) ... [2023-12-18 19:37:06,986 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-12-18 19:37:06,986 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:37:06" (1/1) ... [2023-12-18 19:37:06,986 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:37:06" (1/1) ... [2023-12-18 19:37:06,989 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:37:06" (1/1) ... [2023-12-18 19:37:06,991 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:37:06" (1/1) ... [2023-12-18 19:37:06,991 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:37:06" (1/1) ... [2023-12-18 19:37:06,992 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:37:06" (1/1) ... [2023-12-18 19:37:06,993 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 19:37:06,994 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 19:37:06,994 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 19:37:06,994 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 19:37:06,994 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:37:06" (1/1) ... [2023-12-18 19:37:06,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 19:37:07,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:37:07,016 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 19:37:07,021 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 19:37:07,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 19:37:07,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 19:37:07,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 19:37:07,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 19:37:07,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 19:37:07,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-18 19:37:07,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 19:37:07,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 19:37:07,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 19:37:07,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 19:37:07,100 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 19:37:07,102 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 19:37:07,200 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 19:37:07,228 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 19:37:07,229 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-12-18 19:37:07,229 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:37:07 BoogieIcfgContainer [2023-12-18 19:37:07,229 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 19:37:07,230 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 19:37:07,230 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 19:37:07,232 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 19:37:07,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:37:06" (1/3) ... [2023-12-18 19:37:07,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24baddc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:37:07, skipping insertion in model container [2023-12-18 19:37:07,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:37:06" (2/3) ... [2023-12-18 19:37:07,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24baddc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:37:07, skipping insertion in model container [2023-12-18 19:37:07,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:37:07" (3/3) ... [2023-12-18 19:37:07,234 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m2.c [2023-12-18 19:37:07,246 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 19:37:07,246 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 19:37:07,273 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 19:37:07,277 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;@6989ccbc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 19:37:07,277 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 19:37:07,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 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 19:37:07,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-18 19:37:07,310 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:07,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:37:07,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:07,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:07,314 INFO L85 PathProgramCache]: Analyzing trace with hash 618169066, now seen corresponding path program 1 times [2023-12-18 19:37:07,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:07,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010758282] [2023-12-18 19:37:07,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:07,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:07,432 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 19:37:07,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:07,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010758282] [2023-12-18 19:37:07,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010758282] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:37:07,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 19:37:07,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 19:37:07,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049795677] [2023-12-18 19:37:07,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:37:07,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 19:37:07,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:07,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 19:37:07,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 19:37:07,454 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 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) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:07,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:07,474 INFO L93 Difference]: Finished difference Result 33 states and 52 transitions. [2023-12-18 19:37:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 19:37:07,477 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2023-12-18 19:37:07,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:07,481 INFO L225 Difference]: With dead ends: 33 [2023-12-18 19:37:07,481 INFO L226 Difference]: Without dead ends: 15 [2023-12-18 19:37:07,483 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 19:37:07,485 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:07,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:37:07,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-18 19:37:07,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-12-18 19:37:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2023-12-18 19:37:07,505 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 14 [2023-12-18 19:37:07,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:07,505 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2023-12-18 19:37:07,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:07,506 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2023-12-18 19:37:07,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-18 19:37:07,506 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:07,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:37:07,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 19:37:07,506 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:07,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:07,507 INFO L85 PathProgramCache]: Analyzing trace with hash -156327248, now seen corresponding path program 1 times [2023-12-18 19:37:07,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:07,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561217891] [2023-12-18 19:37:07,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:07,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:07,584 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 19:37:07,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:07,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561217891] [2023-12-18 19:37:07,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561217891] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:37:07,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 19:37:07,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-18 19:37:07,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701569285] [2023-12-18 19:37:07,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:37:07,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 19:37:07,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:07,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 19:37:07,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 19:37:07,587 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:07,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:07,610 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-12-18 19:37:07,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 19:37:07,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2023-12-18 19:37:07,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:07,611 INFO L225 Difference]: With dead ends: 28 [2023-12-18 19:37:07,611 INFO L226 Difference]: Without dead ends: 16 [2023-12-18 19:37:07,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 19:37:07,612 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:07,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:37:07,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-18 19:37:07,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-18 19:37:07,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-12-18 19:37:07,615 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 14 [2023-12-18 19:37:07,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:07,616 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-12-18 19:37:07,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:07,616 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-12-18 19:37:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-18 19:37:07,616 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:07,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:37:07,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 19:37:07,617 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:07,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:07,617 INFO L85 PathProgramCache]: Analyzing trace with hash 2062722695, now seen corresponding path program 1 times [2023-12-18 19:37:07,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:07,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154081482] [2023-12-18 19:37:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:07,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 19:37:07,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:07,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154081482] [2023-12-18 19:37:07,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154081482] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:37:07,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 19:37:07,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 19:37:07,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805294892] [2023-12-18 19:37:07,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:37:07,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 19:37:07,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:07,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 19:37:07,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 19:37:07,687 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:07,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:07,717 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2023-12-18 19:37:07,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 19:37:07,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-18 19:37:07,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:07,718 INFO L225 Difference]: With dead ends: 30 [2023-12-18 19:37:07,718 INFO L226 Difference]: Without dead ends: 20 [2023-12-18 19:37:07,718 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 19:37:07,719 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:07,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 11 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:37:07,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-18 19:37:07,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-18 19:37:07,723 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 19:37:07,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-12-18 19:37:07,723 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 15 [2023-12-18 19:37:07,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:07,723 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-12-18 19:37:07,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:07,723 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-12-18 19:37:07,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-18 19:37:07,724 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:07,724 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 19:37:07,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-18 19:37:07,724 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:07,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:07,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1688113859, now seen corresponding path program 1 times [2023-12-18 19:37:07,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:07,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706173252] [2023-12-18 19:37:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:07,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 19:37:07,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:07,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706173252] [2023-12-18 19:37:07,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706173252] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:37:07,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073432811] [2023-12-18 19:37:07,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:07,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:07,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:37:07,818 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 19:37:07,831 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 19:37:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:07,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 19:37:07,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:37:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 19:37:07,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:37:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 19:37:07,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073432811] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:37:07,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:37:07,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-18 19:37:07,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554756795] [2023-12-18 19:37:07,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:37:07,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 19:37:07,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:07,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 19:37:07,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-18 19:37:07,992 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 19:37:08,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:08,032 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2023-12-18 19:37:08,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 19:37:08,033 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 19:37:08,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:08,034 INFO L225 Difference]: With dead ends: 37 [2023-12-18 19:37:08,034 INFO L226 Difference]: Without dead ends: 21 [2023-12-18 19:37:08,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-18 19:37:08,035 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:08,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:37:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-18 19:37:08,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-18 19:37:08,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-12-18 19:37:08,038 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 19 [2023-12-18 19:37:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:08,039 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-12-18 19:37:08,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 19:37:08,039 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-12-18 19:37:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-18 19:37:08,039 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:08,039 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 19:37:08,052 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 19:37:08,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:08,248 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:08,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:08,249 INFO L85 PathProgramCache]: Analyzing trace with hash 2017877324, now seen corresponding path program 2 times [2023-12-18 19:37:08,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:08,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222757561] [2023-12-18 19:37:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:08,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 19:37:08,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:08,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222757561] [2023-12-18 19:37:08,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222757561] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:37:08,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71091488] [2023-12-18 19:37:08,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:37:08,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:08,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:37:08,308 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 19:37:08,311 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 19:37:08,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:37:08,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:37:08,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 19:37:08,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:37:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 19:37:08,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:37:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 19:37:08,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71091488] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:37:08,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:37:08,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-12-18 19:37:08,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724718283] [2023-12-18 19:37:08,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:37:08,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-18 19:37:08,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:08,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-18 19:37:08,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-18 19:37:08,398 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 19:37:08,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:08,435 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-12-18 19:37:08,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 19:37:08,435 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 20 [2023-12-18 19:37:08,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:08,436 INFO L225 Difference]: With dead ends: 38 [2023-12-18 19:37:08,436 INFO L226 Difference]: Without dead ends: 25 [2023-12-18 19:37:08,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-18 19:37:08,437 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:08,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 17 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:37:08,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-18 19:37:08,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-18 19:37:08,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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 19:37:08,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-12-18 19:37:08,440 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2023-12-18 19:37:08,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:08,441 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-12-18 19:37:08,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 19:37:08,441 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-12-18 19:37:08,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-18 19:37:08,441 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:08,441 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:37:08,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-18 19:37:08,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:08,650 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:08,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:08,651 INFO L85 PathProgramCache]: Analyzing trace with hash 657232848, now seen corresponding path program 3 times [2023-12-18 19:37:08,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:08,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495956905] [2023-12-18 19:37:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:08,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:37:09,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:09,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495956905] [2023-12-18 19:37:09,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495956905] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:37:09,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815291269] [2023-12-18 19:37:09,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:37:09,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:09,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:37:09,685 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 19:37:09,740 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 19:37:09,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-18 19:37:09,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:37:09,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-18 19:37:09,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:37:09,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:37:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:37:10,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:37:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 19:37:10,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815291269] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:37:10,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:37:10,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 36 [2023-12-18 19:37:10,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429758795] [2023-12-18 19:37:10,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:37:10,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-18 19:37:10,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:10,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-18 19:37:10,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2023-12-18 19:37:10,369 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 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 19:37:10,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:10,704 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2023-12-18 19:37:10,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-18 19:37:10,705 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 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 24 [2023-12-18 19:37:10,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:10,705 INFO L225 Difference]: With dead ends: 42 [2023-12-18 19:37:10,706 INFO L226 Difference]: Without dead ends: 38 [2023-12-18 19:37:10,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=1498, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 19:37:10,707 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:10,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 137 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:37:10,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-18 19:37:10,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-12-18 19:37:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 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 19:37:10,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2023-12-18 19:37:10,712 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 24 [2023-12-18 19:37:10,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:10,712 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2023-12-18 19:37:10,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 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 19:37:10,712 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2023-12-18 19:37:10,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-18 19:37:10,712 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:10,713 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:37:10,717 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 19:37:10,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:10,918 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:10,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:10,918 INFO L85 PathProgramCache]: Analyzing trace with hash -604097640, now seen corresponding path program 4 times [2023-12-18 19:37:10,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:10,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869639098] [2023-12-18 19:37:10,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:10,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:10,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-18 19:37:10,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:10,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869639098] [2023-12-18 19:37:10,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869639098] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:37:10,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996811022] [2023-12-18 19:37:10,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:37:10,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:10,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:37:10,990 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 19:37:10,993 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 19:37:11,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:37:11,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:37:11,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 19:37:11,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:37:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-18 19:37:11,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:37:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-18 19:37:11,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996811022] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:37:11,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:37:11,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-12-18 19:37:11,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438635944] [2023-12-18 19:37:11,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:37:11,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-18 19:37:11,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:11,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-18 19:37:11,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-12-18 19:37:11,170 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:11,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:11,373 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2023-12-18 19:37:11,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-18 19:37:11,373 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-18 19:37:11,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:11,374 INFO L225 Difference]: With dead ends: 73 [2023-12-18 19:37:11,374 INFO L226 Difference]: Without dead ends: 30 [2023-12-18 19:37:11,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2023-12-18 19:37:11,376 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:11,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 32 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:37:11,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-18 19:37:11,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-12-18 19:37:11,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:11,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-12-18 19:37:11,384 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 25 [2023-12-18 19:37:11,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:11,384 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-12-18 19:37:11,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:11,385 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-12-18 19:37:11,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-18 19:37:11,385 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:11,385 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:37:11,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-18 19:37:11,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:11,590 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:11,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:11,591 INFO L85 PathProgramCache]: Analyzing trace with hash 573634467, now seen corresponding path program 5 times [2023-12-18 19:37:11,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:11,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657220705] [2023-12-18 19:37:11,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:11,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:37:12,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:12,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657220705] [2023-12-18 19:37:12,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657220705] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:37:12,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836134192] [2023-12-18 19:37:12,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:37:12,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:12,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:37:12,860 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 19:37:12,861 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 19:37:12,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-18 19:37:12,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:37:12,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 70 conjunts are in the unsatisfiable core [2023-12-18 19:37:12,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:37:12,934 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 19:37:12,962 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 19:37:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:37:13,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:37:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 19:37:14,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836134192] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:37:14,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:37:14,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 18] total 55 [2023-12-18 19:37:14,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143743091] [2023-12-18 19:37:14,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:37:14,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-12-18 19:37:14,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:14,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-12-18 19:37:14,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2798, Unknown=0, NotChecked=0, Total=2970 [2023-12-18 19:37:14,102 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 55 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:37:15,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:15,424 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2023-12-18 19:37:15,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 19:37:15,425 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 29 [2023-12-18 19:37:15,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:15,425 INFO L225 Difference]: With dead ends: 59 [2023-12-18 19:37:15,425 INFO L226 Difference]: Without dead ends: 55 [2023-12-18 19:37:15,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=328, Invalid=4928, Unknown=0, NotChecked=0, Total=5256 [2023-12-18 19:37:15,427 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:15,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 189 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-18 19:37:15,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-18 19:37:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2023-12-18 19:37:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:15,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-12-18 19:37:15,433 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 29 [2023-12-18 19:37:15,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:15,434 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-12-18 19:37:15,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:37:15,434 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-12-18 19:37:15,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-18 19:37:15,434 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:15,434 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:37:15,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-18 19:37:15,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:15,640 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:15,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:15,641 INFO L85 PathProgramCache]: Analyzing trace with hash 497772317, now seen corresponding path program 6 times [2023-12-18 19:37:15,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:15,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046887806] [2023-12-18 19:37:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:15,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 19:37:15,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:15,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046887806] [2023-12-18 19:37:15,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046887806] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:37:15,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332874210] [2023-12-18 19:37:15,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:37:15,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:15,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:37:15,752 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 19:37:15,765 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 19:37:15,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-12-18 19:37:15,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:37:15,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 19:37:15,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:37:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 19:37:15,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:37:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 19:37:15,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332874210] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:37:15,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:37:15,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-18 19:37:15,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909653554] [2023-12-18 19:37:15,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:37:15,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 19:37:15,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:15,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 19:37:15,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-18 19:37:15,935 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 19:37:16,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:16,076 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2023-12-18 19:37:16,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 19:37:16,076 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 30 [2023-12-18 19:37:16,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:16,077 INFO L225 Difference]: With dead ends: 95 [2023-12-18 19:37:16,077 INFO L226 Difference]: Without dead ends: 54 [2023-12-18 19:37:16,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 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 19:37:16,079 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 59 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:16,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 36 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:37:16,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-18 19:37:16,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2023-12-18 19:37:16,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:16,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2023-12-18 19:37:16,097 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 30 [2023-12-18 19:37:16,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:16,098 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2023-12-18 19:37:16,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 19:37:16,099 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2023-12-18 19:37:16,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-18 19:37:16,101 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:16,101 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:37:16,114 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 19:37:16,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:16,305 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:16,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:16,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1446173940, now seen corresponding path program 7 times [2023-12-18 19:37:16,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:16,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9895099] [2023-12-18 19:37:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:16,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 19:37:16,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:16,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9895099] [2023-12-18 19:37:16,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9895099] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:37:16,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659104934] [2023-12-18 19:37:16,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:37:16,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:16,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:37:16,422 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 19:37:16,436 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 19:37:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:16,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 19:37:16,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:37:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 19:37:16,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:37:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 19:37:16,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659104934] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:37:16,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:37:16,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-18 19:37:16,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351439473] [2023-12-18 19:37:16,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:37:16,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 19:37:16,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:16,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 19:37:16,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-18 19:37:16,607 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 19:37:16,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:16,738 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-12-18 19:37:16,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-18 19:37:16,739 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 31 [2023-12-18 19:37:16,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:16,739 INFO L225 Difference]: With dead ends: 49 [2023-12-18 19:37:16,739 INFO L226 Difference]: Without dead ends: 35 [2023-12-18 19:37:16,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-12-18 19:37:16,740 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:16,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 20 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:37:16,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-18 19:37:16,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-12-18 19:37:16,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 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 19:37:16,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-12-18 19:37:16,744 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2023-12-18 19:37:16,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:16,744 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-12-18 19:37:16,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 19:37:16,744 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-12-18 19:37:16,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-18 19:37:16,745 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:16,745 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:37:16,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-18 19:37:16,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:16,946 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:16,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:16,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1645096176, now seen corresponding path program 8 times [2023-12-18 19:37:16,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:16,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688199741] [2023-12-18 19:37:16,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:16,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:37:18,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:18,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688199741] [2023-12-18 19:37:18,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688199741] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:37:18,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57477021] [2023-12-18 19:37:18,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:37:18,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:18,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:37:18,552 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 19:37:18,587 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 19:37:18,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:37:18,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:37:18,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 84 conjunts are in the unsatisfiable core [2023-12-18 19:37:18,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:37:18,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:37:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:37:19,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:37:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 19:37:20,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57477021] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:37:20,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:37:20,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25, 22] total 68 [2023-12-18 19:37:20,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443835884] [2023-12-18 19:37:20,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:37:20,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-12-18 19:37:20,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:20,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-12-18 19:37:20,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=4324, Unknown=0, NotChecked=0, Total=4556 [2023-12-18 19:37:20,253 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 68 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 68 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:22,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:22,155 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2023-12-18 19:37:22,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-18 19:37:22,156 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 68 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-18 19:37:22,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:22,156 INFO L225 Difference]: With dead ends: 67 [2023-12-18 19:37:22,156 INFO L226 Difference]: Without dead ends: 63 [2023-12-18 19:37:22,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=435, Invalid=7575, Unknown=0, NotChecked=0, Total=8010 [2023-12-18 19:37:22,158 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:22,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 220 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1532 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-18 19:37:22,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-18 19:37:22,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 50. [2023-12-18 19:37:22,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 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 19:37:22,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2023-12-18 19:37:22,165 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 34 [2023-12-18 19:37:22,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:22,166 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2023-12-18 19:37:22,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 68 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:22,166 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2023-12-18 19:37:22,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-18 19:37:22,166 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:22,166 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:37:22,171 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 19:37:22,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-18 19:37:22,371 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:22,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:22,372 INFO L85 PathProgramCache]: Analyzing trace with hash -245310728, now seen corresponding path program 9 times [2023-12-18 19:37:22,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:22,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62589992] [2023-12-18 19:37:22,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:22,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-18 19:37:22,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:22,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62589992] [2023-12-18 19:37:22,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62589992] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:37:22,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26332815] [2023-12-18 19:37:22,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:37:22,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:22,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:37:22,520 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 19:37:22,559 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 19:37:22,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-18 19:37:22,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:37:22,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 19:37:22,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:37:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-18 19:37:22,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:37:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-18 19:37:22,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26332815] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:37:22,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:37:22,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2023-12-18 19:37:22,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147743160] [2023-12-18 19:37:22,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:37:22,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-18 19:37:22,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:22,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-18 19:37:22,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2023-12-18 19:37:22,820 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:23,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:23,155 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2023-12-18 19:37:23,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-18 19:37:23,156 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 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 35 [2023-12-18 19:37:23,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:23,156 INFO L225 Difference]: With dead ends: 101 [2023-12-18 19:37:23,156 INFO L226 Difference]: Without dead ends: 40 [2023-12-18 19:37:23,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=337, Invalid=1643, Unknown=0, NotChecked=0, Total=1980 [2023-12-18 19:37:23,157 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:23,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 44 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:37:23,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-18 19:37:23,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-12-18 19:37:23,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:23,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2023-12-18 19:37:23,162 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 35 [2023-12-18 19:37:23,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:23,162 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2023-12-18 19:37:23,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:23,162 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2023-12-18 19:37:23,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-18 19:37:23,163 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:23,163 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:37:23,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-18 19:37:23,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:23,371 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:23,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:23,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1575564419, now seen corresponding path program 10 times [2023-12-18 19:37:23,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:23,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567135032] [2023-12-18 19:37:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:23,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 3 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:37:25,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:25,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567135032] [2023-12-18 19:37:25,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567135032] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:37:25,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380950522] [2023-12-18 19:37:25,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:37:25,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:25,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:37:25,753 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 19:37:25,755 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 19:37:25,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:37:25,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:37:25,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 98 conjunts are in the unsatisfiable core [2023-12-18 19:37:25,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:37:25,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-18 19:37:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 19:37:26,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:37:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 19:37:28,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380950522] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:37:28,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:37:28,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 28, 29] total 84 [2023-12-18 19:37:28,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875132339] [2023-12-18 19:37:28,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:37:28,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-12-18 19:37:28,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:28,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-12-18 19:37:28,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=6619, Unknown=0, NotChecked=0, Total=6972 [2023-12-18 19:37:28,160 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 84 states, 84 states have (on average 1.2261904761904763) internal successors, (103), 84 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 19:37:31,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:31,416 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2023-12-18 19:37:31,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-18 19:37:31,416 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.2261904761904763) internal successors, (103), 84 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 39 [2023-12-18 19:37:31,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:31,417 INFO L225 Difference]: With dead ends: 75 [2023-12-18 19:37:31,417 INFO L226 Difference]: Without dead ends: 71 [2023-12-18 19:37:31,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3353 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=852, Invalid=12720, Unknown=0, NotChecked=0, Total=13572 [2023-12-18 19:37:31,420 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 52 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:31,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 170 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1759 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-18 19:37:31,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-18 19:37:31,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2023-12-18 19:37:31,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2023-12-18 19:37:31,439 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 39 [2023-12-18 19:37:31,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:31,439 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2023-12-18 19:37:31,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.2261904761904763) internal successors, (103), 84 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 19:37:31,439 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2023-12-18 19:37:31,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 19:37:31,440 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:31,440 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:37:31,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-18 19:37:31,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-18 19:37:31,646 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:31,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:31,646 INFO L85 PathProgramCache]: Analyzing trace with hash 614734781, now seen corresponding path program 11 times [2023-12-18 19:37:31,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:31,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135155058] [2023-12-18 19:37:31,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:31,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-18 19:37:31,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:31,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135155058] [2023-12-18 19:37:31,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135155058] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:37:31,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906653425] [2023-12-18 19:37:31,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:37:31,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:31,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:37:31,774 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 19:37:31,799 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 19:37:31,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-18 19:37:31,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:37:31,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 19:37:31,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:37:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-18 19:37:32,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:37:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-18 19:37:32,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906653425] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:37:32,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:37:32,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2023-12-18 19:37:32,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365578932] [2023-12-18 19:37:32,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:37:32,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-18 19:37:32,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:32,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-18 19:37:32,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2023-12-18 19:37:32,146 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 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 19:37:32,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:32,580 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2023-12-18 19:37:32,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-18 19:37:32,580 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 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 40 [2023-12-18 19:37:32,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:32,581 INFO L225 Difference]: With dead ends: 115 [2023-12-18 19:37:32,581 INFO L226 Difference]: Without dead ends: 45 [2023-12-18 19:37:32,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=450, Invalid=2306, Unknown=0, NotChecked=0, Total=2756 [2023-12-18 19:37:32,586 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:32,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 44 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 19:37:32,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-18 19:37:32,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-12-18 19:37:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:32,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2023-12-18 19:37:32,595 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 40 [2023-12-18 19:37:32,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:32,595 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2023-12-18 19:37:32,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 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 19:37:32,595 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2023-12-18 19:37:32,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-18 19:37:32,596 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:32,596 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:37:32,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-18 19:37:32,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-18 19:37:32,802 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:32,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:32,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1723166224, now seen corresponding path program 12 times [2023-12-18 19:37:32,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:32,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280511970] [2023-12-18 19:37:32,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:32,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:37:36,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:36,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280511970] [2023-12-18 19:37:36,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280511970] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:37:36,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527672514] [2023-12-18 19:37:36,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:37:36,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:36,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:37:36,024 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 19:37:36,047 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 19:37:36,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-18 19:37:36,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:37:36,148 WARN L260 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 123 conjunts are in the unsatisfiable core [2023-12-18 19:37:36,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:37:37,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:37:37,889 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 19 treesize of output 16 [2023-12-18 19:37:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 19:37:37,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:37:40,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:37:40,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 86 treesize of output 235 [2023-12-18 19:37:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 19:37:41,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527672514] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:37:41,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:37:41,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38, 33] total 102 [2023-12-18 19:37:41,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645458876] [2023-12-18 19:37:41,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:37:41,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-12-18 19:37:41,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:41,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-12-18 19:37:41,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=9915, Unknown=0, NotChecked=0, Total=10302 [2023-12-18 19:37:41,118 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 102 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 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 19:37:46,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:46,033 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2023-12-18 19:37:46,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-18 19:37:46,033 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 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) Word has length 44 [2023-12-18 19:37:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:46,034 INFO L225 Difference]: With dead ends: 83 [2023-12-18 19:37:46,034 INFO L226 Difference]: Without dead ends: 79 [2023-12-18 19:37:46,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4705 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=899, Invalid=18283, Unknown=0, NotChecked=0, Total=19182 [2023-12-18 19:37:46,037 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 2856 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:46,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 306 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2856 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-18 19:37:46,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-18 19:37:46,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2023-12-18 19:37:46,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.126984126984127) internal successors, (71), 63 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:46,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2023-12-18 19:37:46,066 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 44 [2023-12-18 19:37:46,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:46,066 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2023-12-18 19:37:46,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 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 19:37:46,067 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2023-12-18 19:37:46,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-18 19:37:46,067 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:46,067 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:37:46,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-18 19:37:46,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-18 19:37:46,268 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:46,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:46,280 INFO L85 PathProgramCache]: Analyzing trace with hash -793765288, now seen corresponding path program 13 times [2023-12-18 19:37:46,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:46,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392958672] [2023-12-18 19:37:46,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:46,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-18 19:37:46,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:46,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392958672] [2023-12-18 19:37:46,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392958672] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:37:46,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066665110] [2023-12-18 19:37:46,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:37:46,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:46,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:37:46,560 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 19:37:46,590 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 19:37:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:46,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 19:37:46,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:37:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-18 19:37:46,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:37:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-18 19:37:46,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066665110] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:37:46,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:37:46,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-12-18 19:37:46,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163166744] [2023-12-18 19:37:46,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:37:46,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-18 19:37:46,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:46,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-18 19:37:46,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-12-18 19:37:46,873 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:47,099 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2023-12-18 19:37:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-18 19:37:47,100 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-12-18 19:37:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:47,100 INFO L225 Difference]: With dead ends: 137 [2023-12-18 19:37:47,100 INFO L226 Difference]: Without dead ends: 75 [2023-12-18 19:37:47,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 68 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-12-18 19:37:47,101 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 57 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:47,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 36 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:37:47,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-18 19:37:47,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2023-12-18 19:37:47,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:47,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2023-12-18 19:37:47,114 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 45 [2023-12-18 19:37:47,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:47,114 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2023-12-18 19:37:47,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:47,114 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2023-12-18 19:37:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-18 19:37:47,114 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:47,114 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:37:47,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-18 19:37:47,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-18 19:37:47,317 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:47,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:47,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1255056479, now seen corresponding path program 14 times [2023-12-18 19:37:47,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:47,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439701254] [2023-12-18 19:37:47,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:47,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-18 19:37:47,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:47,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439701254] [2023-12-18 19:37:47,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439701254] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:37:47,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470889087] [2023-12-18 19:37:47,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:37:47,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:47,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:37:47,502 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 19:37:47,503 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 19:37:47,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:37:47,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:37:47,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 19:37:47,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:37:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-18 19:37:47,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:37:47,836 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-18 19:37:47,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470889087] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:37:47,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:37:47,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-12-18 19:37:47,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812706992] [2023-12-18 19:37:47,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:37:47,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-18 19:37:47,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:47,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-18 19:37:47,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-12-18 19:37:47,838 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:47,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:47,965 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2023-12-18 19:37:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-18 19:37:47,965 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-12-18 19:37:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:47,966 INFO L225 Difference]: With dead ends: 70 [2023-12-18 19:37:47,966 INFO L226 Difference]: Without dead ends: 50 [2023-12-18 19:37:47,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 69 SyntacticMatches, 14 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 19:37:47,966 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 42 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:47,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 20 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:37:47,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-18 19:37:47,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-12-18 19:37:47,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 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 19:37:47,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-12-18 19:37:47,979 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 46 [2023-12-18 19:37:47,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:47,979 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-12-18 19:37:47,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:47,979 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-12-18 19:37:47,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-18 19:37:47,980 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:47,980 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:37:47,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-18 19:37:48,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:48,185 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:48,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:48,185 INFO L85 PathProgramCache]: Analyzing trace with hash -194688669, now seen corresponding path program 15 times [2023-12-18 19:37:48,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:48,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650934618] [2023-12-18 19:37:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:48,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 1 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:37:51,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:51,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650934618] [2023-12-18 19:37:51,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650934618] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:37:51,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224504134] [2023-12-18 19:37:51,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:37:51,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:51,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:37:51,604 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 19:37:51,606 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 19:37:51,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-18 19:37:51,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:37:51,696 WARN L260 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 141 conjunts are in the unsatisfiable core [2023-12-18 19:37:51,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:37:51,760 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 19 treesize of output 1 [2023-12-18 19:37:54,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:37:54,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:37:54,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:37:54,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:37:54,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 71 [2023-12-18 19:37:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 5 proven. 125 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 19:37:54,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:37:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-18 19:37:58,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224504134] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:37:58,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:37:58,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 40, 37] total 113 [2023-12-18 19:37:58,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185985198] [2023-12-18 19:37:58,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:37:58,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2023-12-18 19:37:58,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:58,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2023-12-18 19:37:58,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=12208, Unknown=0, NotChecked=0, Total=12656 [2023-12-18 19:37:58,108 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 113 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 113 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:38:06,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:38:06,307 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2023-12-18 19:38:06,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-12-18 19:38:06,307 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 113 states have internal predecessors, (131), 0 states have call successors, (0), 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 49 [2023-12-18 19:38:06,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:38:06,308 INFO L225 Difference]: With dead ends: 89 [2023-12-18 19:38:06,308 INFO L226 Difference]: Without dead ends: 85 [2023-12-18 19:38:06,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4280 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=1216, Invalid=24544, Unknown=0, NotChecked=0, Total=25760 [2023-12-18 19:38:06,310 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 3451 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 3644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 3451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:38:06,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 317 Invalid, 3644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 3451 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-18 19:38:06,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-18 19:38:06,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 71. [2023-12-18 19:38:06,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:38:06,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2023-12-18 19:38:06,331 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 49 [2023-12-18 19:38:06,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:38:06,331 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2023-12-18 19:38:06,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 113 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:38:06,331 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2023-12-18 19:38:06,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-18 19:38:06,332 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:38:06,332 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:38:06,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-18 19:38:06,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-18 19:38:06,534 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:38:06,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:38:06,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1133623389, now seen corresponding path program 16 times [2023-12-18 19:38:06,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:38:06,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041369624] [2023-12-18 19:38:06,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:38:06,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:38:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:38:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-18 19:38:06,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:38:06,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041369624] [2023-12-18 19:38:06,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041369624] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:38:06,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898943639] [2023-12-18 19:38:06,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:38:06,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:38:06,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:38:06,752 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 19:38:06,755 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 19:38:06,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:38:06,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:38:06,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-18 19:38:06,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:38:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-18 19:38:07,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:38:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-18 19:38:07,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898943639] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:38:07,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:38:07,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2023-12-18 19:38:07,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952794816] [2023-12-18 19:38:07,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:38:07,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-18 19:38:07,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:38:07,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-18 19:38:07,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2023-12-18 19:38:07,334 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:38:07,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:38:07,920 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2023-12-18 19:38:07,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-18 19:38:07,921 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 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 19:38:07,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:38:07,921 INFO L225 Difference]: With dead ends: 143 [2023-12-18 19:38:07,921 INFO L226 Difference]: Without dead ends: 55 [2023-12-18 19:38:07,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 69 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=724, Invalid=3968, Unknown=0, NotChecked=0, Total=4692 [2023-12-18 19:38:07,922 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 19:38:07,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 50 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 19:38:07,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-18 19:38:07,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-12-18 19:38:07,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 54 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 19:38:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2023-12-18 19:38:07,934 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 50 [2023-12-18 19:38:07,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:38:07,934 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2023-12-18 19:38:07,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:38:07,934 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2023-12-18 19:38:07,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-18 19:38:07,934 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:38:07,934 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:38:07,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-18 19:38:08,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:38:08,135 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:38:08,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:38:08,135 INFO L85 PathProgramCache]: Analyzing trace with hash 50616112, now seen corresponding path program 17 times [2023-12-18 19:38:08,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:38:08,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525377799] [2023-12-18 19:38:08,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:38:08,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:38:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:38:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:38:12,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:38:12,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525377799] [2023-12-18 19:38:12,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525377799] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:38:12,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466370912] [2023-12-18 19:38:12,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:38:12,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:38:12,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:38:12,477 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 19:38:12,482 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 19:38:12,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-18 19:38:12,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:38:12,615 WARN L260 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 156 conjunts are in the unsatisfiable core [2023-12-18 19:38:12,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:38:12,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:38:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:38:15,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:38:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-18 19:38:18,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466370912] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:38:18,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:38:18,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 45, 38] total 124 [2023-12-18 19:38:18,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998802374] [2023-12-18 19:38:18,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:38:18,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2023-12-18 19:38:18,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:38:18,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2023-12-18 19:38:18,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=14803, Unknown=0, NotChecked=0, Total=15252 [2023-12-18 19:38:18,927 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 124 states, 124 states have (on average 1.1693548387096775) internal successors, (145), 124 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:38:23,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:38:23,674 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2023-12-18 19:38:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-18 19:38:23,674 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.1693548387096775) internal successors, (145), 124 states have internal predecessors, (145), 0 states have call successors, (0), 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 19:38:23,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:38:23,675 INFO L225 Difference]: With dead ends: 99 [2023-12-18 19:38:23,675 INFO L226 Difference]: Without dead ends: 95 [2023-12-18 19:38:23,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5987 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=815, Invalid=23677, Unknown=0, NotChecked=0, Total=24492 [2023-12-18 19:38:23,676 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 3910 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 3958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 3910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:38:23,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 314 Invalid, 3958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 3910 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-18 19:38:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-18 19:38:23,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2023-12-18 19:38:23,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.103896103896104) internal successors, (85), 77 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 19:38:23,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2023-12-18 19:38:23,701 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 54 [2023-12-18 19:38:23,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:38:23,702 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2023-12-18 19:38:23,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.1693548387096775) internal successors, (145), 124 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:38:23,702 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2023-12-18 19:38:23,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-18 19:38:23,702 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:38:23,702 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:38:23,710 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 19:38:23,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:38:23,908 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:38:23,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:38:23,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1747055032, now seen corresponding path program 18 times [2023-12-18 19:38:23,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:38:23,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706999199] [2023-12-18 19:38:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:38:23,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:38:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:38:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-12-18 19:38:24,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:38:24,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706999199] [2023-12-18 19:38:24,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706999199] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:38:24,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986024833] [2023-12-18 19:38:24,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:38:24,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:38:24,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:38:24,142 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 19:38:24,191 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 19:38:24,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-18 19:38:24,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:38:24,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-18 19:38:24,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:38:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-12-18 19:38:24,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:38:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-12-18 19:38:24,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986024833] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:38:24,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:38:24,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2023-12-18 19:38:24,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522724492] [2023-12-18 19:38:24,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:38:24,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-18 19:38:24,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:38:24,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-18 19:38:24,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1975, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 19:38:24,875 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 49 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:38:25,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:38:25,438 INFO L93 Difference]: Finished difference Result 157 states and 174 transitions. [2023-12-18 19:38:25,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-18 19:38:25,438 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-18 19:38:25,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:38:25,438 INFO L225 Difference]: With dead ends: 157 [2023-12-18 19:38:25,438 INFO L226 Difference]: Without dead ends: 60 [2023-12-18 19:38:25,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 75 SyntacticMatches, 10 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=885, Invalid=4967, Unknown=0, NotChecked=0, Total=5852 [2023-12-18 19:38:25,440 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 97 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 19:38:25,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 32 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 19:38:25,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-18 19:38:25,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-12-18 19:38:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:38:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2023-12-18 19:38:25,468 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 55 [2023-12-18 19:38:25,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:38:25,468 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2023-12-18 19:38:25,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:38:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2023-12-18 19:38:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-18 19:38:25,468 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:38:25,468 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:38:25,478 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 19:38:25,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:38:25,674 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:38:25,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:38:25,674 INFO L85 PathProgramCache]: Analyzing trace with hash -2084358589, now seen corresponding path program 19 times [2023-12-18 19:38:25,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:38:25,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610681744] [2023-12-18 19:38:25,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:38:25,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:38:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:38:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:38:31,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:38:31,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610681744] [2023-12-18 19:38:31,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610681744] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:38:31,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138063974] [2023-12-18 19:38:31,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:38:31,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:38:31,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:38:31,005 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 19:38:31,008 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 19:38:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:38:31,118 WARN L260 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 174 conjunts are in the unsatisfiable core [2023-12-18 19:38:31,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:38:31,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:38:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:38:34,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:38:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-18 19:38:39,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138063974] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:38:39,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:38:39,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 50, 42] total 138 [2023-12-18 19:38:39,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609871054] [2023-12-18 19:38:39,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:38:39,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2023-12-18 19:38:39,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:38:39,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2023-12-18 19:38:39,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=18335, Unknown=0, NotChecked=0, Total=18906 [2023-12-18 19:38:39,039 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 138 states, 138 states have (on average 1.1521739130434783) internal successors, (159), 138 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:38:45,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:38:45,486 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2023-12-18 19:38:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-12-18 19:38:45,489 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.1521739130434783) internal successors, (159), 138 states have internal predecessors, (159), 0 states have call successors, (0), 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 59 [2023-12-18 19:38:45,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:38:45,489 INFO L225 Difference]: With dead ends: 107 [2023-12-18 19:38:45,489 INFO L226 Difference]: Without dead ends: 103 [2023-12-18 19:38:45,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8902 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=1221, Invalid=32451, Unknown=0, NotChecked=0, Total=33672 [2023-12-18 19:38:45,492 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 4745 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 4836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 4745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-18 19:38:45,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 338 Invalid, 4836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 4745 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-18 19:38:45,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-12-18 19:38:45,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2023-12-18 19:38:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 84 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:38:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2023-12-18 19:38:45,519 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 59 [2023-12-18 19:38:45,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:38:45,519 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2023-12-18 19:38:45,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.1521739130434783) internal successors, (159), 138 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:38:45,520 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2023-12-18 19:38:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-18 19:38:45,520 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:38:45,520 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:38:45,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-18 19:38:45,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:38:45,725 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:38:45,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:38:45,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1790852349, now seen corresponding path program 20 times [2023-12-18 19:38:45,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:38:45,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431141312] [2023-12-18 19:38:45,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:38:45,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:38:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:38:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-12-18 19:38:46,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:38:46,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431141312] [2023-12-18 19:38:46,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431141312] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:38:46,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078698964] [2023-12-18 19:38:46,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:38:46,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:38:46,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:38:46,031 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 19:38:46,032 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 19:38:46,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:38:46,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:38:46,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-18 19:38:46,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:38:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-12-18 19:38:46,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:38:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-12-18 19:38:46,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078698964] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:38:46,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:38:46,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-12-18 19:38:46,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964748591] [2023-12-18 19:38:46,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:38:46,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-18 19:38:46,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:38:46,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-18 19:38:46,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 19:38:46,474 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 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 19:38:46,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:38:46,802 INFO L93 Difference]: Finished difference Result 179 states and 194 transitions. [2023-12-18 19:38:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 19:38:46,802 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 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 60 [2023-12-18 19:38:46,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:38:46,803 INFO L225 Difference]: With dead ends: 179 [2023-12-18 19:38:46,803 INFO L226 Difference]: Without dead ends: 96 [2023-12-18 19:38:46,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 89 SyntacticMatches, 19 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2023-12-18 19:38:46,804 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 74 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:38:46,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 39 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:38:46,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-18 19:38:46,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2023-12-18 19:38:46,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 85 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:38:46,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2023-12-18 19:38:46,827 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 60 [2023-12-18 19:38:46,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:38:46,828 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2023-12-18 19:38:46,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 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 19:38:46,828 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2023-12-18 19:38:46,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-18 19:38:46,828 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:38:46,828 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:38:46,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-18 19:38:47,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-18 19:38:47,033 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:38:47,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:38:47,033 INFO L85 PathProgramCache]: Analyzing trace with hash 806035604, now seen corresponding path program 21 times [2023-12-18 19:38:47,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:38:47,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752004755] [2023-12-18 19:38:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:38:47,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:38:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:38:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-18 19:38:47,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:38:47,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752004755] [2023-12-18 19:38:47,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752004755] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:38:47,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157197789] [2023-12-18 19:38:47,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:38:47,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:38:47,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:38:47,274 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 19:38:47,299 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 19:38:47,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-18 19:38:47,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:38:47,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-18 19:38:47,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:38:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-18 19:38:47,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:38:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-18 19:38:47,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157197789] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:38:47,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:38:47,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-12-18 19:38:47,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780514666] [2023-12-18 19:38:47,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:38:47,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-18 19:38:47,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:38:47,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-18 19:38:47,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 19:38:47,733 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:38:48,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:38:48,034 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2023-12-18 19:38:48,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-18 19:38:48,035 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 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 19:38:48,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:38:48,035 INFO L225 Difference]: With dead ends: 91 [2023-12-18 19:38:48,035 INFO L226 Difference]: Without dead ends: 65 [2023-12-18 19:38:48,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 91 SyntacticMatches, 20 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=497, Invalid=1665, Unknown=0, NotChecked=0, Total=2162 [2023-12-18 19:38:48,036 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:38:48,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:38:48,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-18 19:38:48,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-12-18 19:38:48,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.078125) internal successors, (69), 64 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 19:38:48,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2023-12-18 19:38:48,053 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 61 [2023-12-18 19:38:48,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:38:48,053 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2023-12-18 19:38:48,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:38:48,053 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2023-12-18 19:38:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-18 19:38:48,053 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:38:48,054 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:38:48,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-18 19:38:48,259 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,SelfDestructingSolverStorable23 [2023-12-18 19:38:48,259 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:38:48,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:38:48,259 INFO L85 PathProgramCache]: Analyzing trace with hash 861726800, now seen corresponding path program 22 times [2023-12-18 19:38:48,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:38:48,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731898058] [2023-12-18 19:38:48,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:38:48,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:38:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:38:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 21 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:38:54,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:38:54,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731898058] [2023-12-18 19:38:54,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731898058] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:38:54,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739702086] [2023-12-18 19:38:54,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:38:54,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:38:54,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:38:54,469 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 19:38:54,472 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 19:38:54,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:38:54,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:38:54,614 WARN L260 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 172 conjunts are in the unsatisfiable core [2023-12-18 19:38:54,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:38:54,689 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 19 treesize of output 1 [2023-12-18 19:38:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-18 19:38:57,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:39:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-18 19:39:03,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739702086] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:39:03,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:39:03,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 46, 46] total 144 [2023-12-18 19:39:03,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135999151] [2023-12-18 19:39:03,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:39:03,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2023-12-18 19:39:03,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:39:03,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2023-12-18 19:39:03,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=19952, Unknown=0, NotChecked=0, Total=20592 [2023-12-18 19:39:03,307 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 144 states, 144 states have (on average 1.1527777777777777) internal successors, (166), 144 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:39:12,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:39:12,128 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2023-12-18 19:39:12,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-12-18 19:39:12,129 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 1.1527777777777777) internal successors, (166), 144 states have internal predecessors, (166), 0 states have call successors, (0), 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 19:39:12,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:39:12,129 INFO L225 Difference]: With dead ends: 115 [2023-12-18 19:39:12,129 INFO L226 Difference]: Without dead ends: 111 [2023-12-18 19:39:12,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9927 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=1497, Invalid=36723, Unknown=0, NotChecked=0, Total=38220 [2023-12-18 19:39:12,148 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 5326 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 5456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 5326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:39:12,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 375 Invalid, 5456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 5326 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-18 19:39:12,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-18 19:39:12,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2023-12-18 19:39:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 91 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 19:39:12,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2023-12-18 19:39:12,177 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 64 [2023-12-18 19:39:12,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:39:12,177 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2023-12-18 19:39:12,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 1.1527777777777777) internal successors, (166), 144 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:39:12,177 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2023-12-18 19:39:12,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-18 19:39:12,178 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:39:12,178 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:39:12,184 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 19:39:12,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:39:12,384 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:39:12,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:39:12,384 INFO L85 PathProgramCache]: Analyzing trace with hash 996958488, now seen corresponding path program 23 times [2023-12-18 19:39:12,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:39:12,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864749471] [2023-12-18 19:39:12,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:39:12,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:39:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:39:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-12-18 19:39:12,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:39:12,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864749471] [2023-12-18 19:39:12,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864749471] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:39:12,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108456902] [2023-12-18 19:39:12,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:39:12,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:39:12,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:39:12,716 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 19:39:12,735 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 19:39:13,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-18 19:39:13,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:39:13,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-18 19:39:13,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:39:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-12-18 19:39:13,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:39:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-12-18 19:39:13,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108456902] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:39:13,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:39:13,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 59 [2023-12-18 19:39:13,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896044843] [2023-12-18 19:39:13,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:39:13,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-12-18 19:39:13,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:39:13,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-12-18 19:39:13,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=2886, Unknown=0, NotChecked=0, Total=3422 [2023-12-18 19:39:13,771 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 59 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:39:14,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:39:14,619 INFO L93 Difference]: Finished difference Result 185 states and 202 transitions. [2023-12-18 19:39:14,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-18 19:39:14,620 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-12-18 19:39:14,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:39:14,620 INFO L225 Difference]: With dead ends: 185 [2023-12-18 19:39:14,620 INFO L226 Difference]: Without dead ends: 70 [2023-12-18 19:39:14,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 87 SyntacticMatches, 12 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3392 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1255, Invalid=7301, Unknown=0, NotChecked=0, Total=8556 [2023-12-18 19:39:14,621 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1597 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 1597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-18 19:39:14,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 44 Invalid, 2047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 1597 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-18 19:39:14,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-18 19:39:14,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-12-18 19:39:14,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:39:14,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2023-12-18 19:39:14,644 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2023-12-18 19:39:14,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:39:14,644 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2023-12-18 19:39:14,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:39:14,644 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2023-12-18 19:39:14,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-18 19:39:14,645 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:39:14,645 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:39:14,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-18 19:39:14,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:39:14,852 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:39:14,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:39:14,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1268841251, now seen corresponding path program 24 times [2023-12-18 19:39:14,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:39:14,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151353904] [2023-12-18 19:39:14,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:39:14,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:39:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:39:22,000 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 36 proven. 294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:39:22,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:39:22,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151353904] [2023-12-18 19:39:22,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151353904] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:39:22,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392501185] [2023-12-18 19:39:22,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:39:22,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:39:22,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:39:22,002 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 19:39:22,004 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 19:39:22,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-18 19:39:22,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:39:22,292 WARN L260 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 221 conjunts are in the unsatisfiable core [2023-12-18 19:39:22,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:39:22,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-18 19:39:22,630 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 19 treesize of output 1 [2023-12-18 19:39:27,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:39:27,733 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:39:27,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-12-18 19:39:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 3 proven. 324 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 19:39:27,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:39:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-18 19:39:37,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392501185] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:39:37,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:39:37,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 62, 56] total 174 [2023-12-18 19:39:37,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054308394] [2023-12-18 19:39:37,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:39:37,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2023-12-18 19:39:37,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:39:37,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2023-12-18 19:39:37,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1985, Invalid=28117, Unknown=0, NotChecked=0, Total=30102 [2023-12-18 19:39:37,106 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 174 states, 174 states have (on average 1.0919540229885059) internal successors, (190), 174 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:40:16,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:40:16,219 INFO L93 Difference]: Finished difference Result 162 states and 186 transitions. [2023-12-18 19:40:16,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-12-18 19:40:16,219 INFO L78 Accepts]: Start accepts. Automaton has has 174 states, 174 states have (on average 1.0919540229885059) internal successors, (190), 174 states have internal predecessors, (190), 0 states have call successors, (0), 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 19:40:16,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:40:16,221 INFO L225 Difference]: With dead ends: 162 [2023-12-18 19:40:16,221 INFO L226 Difference]: Without dead ends: 113 [2023-12-18 19:40:16,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19871 ImplicationChecksByTransitivity, 49.4s TimeCoverageRelationStatistics Valid=6939, Invalid=70067, Unknown=0, NotChecked=0, Total=77006 [2023-12-18 19:40:16,224 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 263 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 7178 mSolverCounterSat, 1007 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 8185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1007 IncrementalHoareTripleChecker+Valid, 7178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-12-18 19:40:16,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 230 Invalid, 8185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1007 Valid, 7178 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-12-18 19:40:16,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-12-18 19:40:16,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 73. [2023-12-18 19:40:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 72 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:40:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2023-12-18 19:40:16,273 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 69 [2023-12-18 19:40:16,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:40:16,273 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2023-12-18 19:40:16,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 174 states, 174 states have (on average 1.0919540229885059) internal successors, (190), 174 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:40:16,274 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2023-12-18 19:40:16,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-18 19:40:16,274 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:40:16,274 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:40:16,282 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 19:40:16,482 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,SelfDestructingSolverStorable26 [2023-12-18 19:40:16,483 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:40:16,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:40:16,483 INFO L85 PathProgramCache]: Analyzing trace with hash 619948445, now seen corresponding path program 25 times [2023-12-18 19:40:16,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:40:16,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819706478] [2023-12-18 19:40:16,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:40:16,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:40:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:40:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 67 proven. 77 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-12-18 19:40:16,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:40:16,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819706478] [2023-12-18 19:40:16,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819706478] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:40:16,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068676691] [2023-12-18 19:40:16,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:40:16,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:40:16,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:40:16,831 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 19:40:16,833 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 19:40:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:40:16,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-18 19:40:16,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:40:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-12-18 19:40:17,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:40:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-12-18 19:40:17,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068676691] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:40:17,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:40:17,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-12-18 19:40:17,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422196488] [2023-12-18 19:40:17,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:40:17,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-18 19:40:17,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:40:17,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-18 19:40:17,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 19:40:17,393 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 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 19:40:17,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:40:17,784 INFO L93 Difference]: Finished difference Result 181 states and 194 transitions. [2023-12-18 19:40:17,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-18 19:40:17,784 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 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) Word has length 70 [2023-12-18 19:40:17,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:40:17,785 INFO L225 Difference]: With dead ends: 181 [2023-12-18 19:40:17,785 INFO L226 Difference]: Without dead ends: 110 [2023-12-18 19:40:17,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 103 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2023-12-18 19:40:17,786 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 76 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:40:17,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 39 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:40:17,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-12-18 19:40:17,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2023-12-18 19:40:17,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0707070707070707) internal successors, (106), 99 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:40:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2023-12-18 19:40:17,861 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 70 [2023-12-18 19:40:17,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:40:17,862 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2023-12-18 19:40:17,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 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 19:40:17,862 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2023-12-18 19:40:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-18 19:40:17,862 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:40:17,862 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:40:17,867 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 19:40:18,067 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,SelfDestructingSolverStorable27 [2023-12-18 19:40:18,067 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:40:18,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:40:18,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1487289460, now seen corresponding path program 26 times [2023-12-18 19:40:18,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:40:18,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571786996] [2023-12-18 19:40:18,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:40:18,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:40:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:40:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 55 proven. 89 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-12-18 19:40:18,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:40:18,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571786996] [2023-12-18 19:40:18,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571786996] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:40:18,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037408571] [2023-12-18 19:40:18,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:40:18,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:40:18,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:40:18,416 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 19:40:18,420 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 19:40:18,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:40:18,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:40:18,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-18 19:40:18,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:40:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-12-18 19:40:18,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:40:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-12-18 19:40:19,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037408571] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:40:19,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:40:19,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-12-18 19:40:19,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24954142] [2023-12-18 19:40:19,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:40:19,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-18 19:40:19,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:40:19,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-18 19:40:19,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 19:40:19,004 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 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 19:40:19,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:40:19,389 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2023-12-18 19:40:19,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-18 19:40:19,389 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 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) Word has length 71 [2023-12-18 19:40:19,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:40:19,390 INFO L225 Difference]: With dead ends: 105 [2023-12-18 19:40:19,390 INFO L226 Difference]: Without dead ends: 75 [2023-12-18 19:40:19,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 104 SyntacticMatches, 24 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=676, Invalid=2294, Unknown=0, NotChecked=0, Total=2970 [2023-12-18 19:40:19,391 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 52 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:40:19,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 29 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:40:19,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-18 19:40:19,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-12-18 19:40:19,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 74 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:40:19,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2023-12-18 19:40:19,441 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 71 [2023-12-18 19:40:19,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:40:19,441 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2023-12-18 19:40:19,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 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 19:40:19,441 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2023-12-18 19:40:19,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-18 19:40:19,442 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:40:19,442 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:40:19,446 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 19:40:19,645 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,SelfDestructingSolverStorable28 [2023-12-18 19:40:19,646 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:40:19,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:40:19,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1117856112, now seen corresponding path program 27 times [2023-12-18 19:40:19,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:40:19,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429284416] [2023-12-18 19:40:19,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:40:19,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:40:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:40:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 36 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:40:29,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:40:29,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429284416] [2023-12-18 19:40:29,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429284416] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:40:29,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791901033] [2023-12-18 19:40:29,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:40:29,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:40:29,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:40:29,521 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 19:40:29,523 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 19:40:29,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-18 19:40:29,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:40:29,724 WARN L260 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 237 conjunts are in the unsatisfiable core [2023-12-18 19:40:29,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:40:29,993 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 19:40:36,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:40:36,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:40:36,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:40:36,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:40:36,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:40:36,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:40:36,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:40:36,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:40:36,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:40:36,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:40:36,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:40:36,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:40:36,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:40:36,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:40:36,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:40:36,376 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:40:36,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 90 treesize of output 188 [2023-12-18 19:40:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 6 proven. 369 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 19:40:36,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:40:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 362 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-18 19:40:47,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791901033] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:40:47,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:40:47,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 68, 65] total 194 [2023-12-18 19:40:47,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621022405] [2023-12-18 19:40:47,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:40:47,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2023-12-18 19:40:47,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:40:47,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2023-12-18 19:40:47,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2296, Invalid=35146, Unknown=0, NotChecked=0, Total=37442 [2023-12-18 19:40:47,447 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 194 states, 194 states have (on average 1.0515463917525774) internal successors, (204), 194 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:42:08,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:42:11,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:42:11,580 INFO L93 Difference]: Finished difference Result 277 states and 302 transitions. [2023-12-18 19:42:11,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2023-12-18 19:42:11,581 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.0515463917525774) internal successors, (204), 194 states have internal predecessors, (204), 0 states have call successors, (0), 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 74 [2023-12-18 19:42:11,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:42:11,582 INFO L225 Difference]: With dead ends: 277 [2023-12-18 19:42:11,582 INFO L226 Difference]: Without dead ends: 239 [2023-12-18 19:42:11,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 371 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34763 ImplicationChecksByTransitivity, 91.0s TimeCoverageRelationStatistics Valid=14417, Invalid=124338, Unknown=1, NotChecked=0, Total=138756 [2023-12-18 19:42:11,587 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 684 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 12979 mSolverCounterSat, 3227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 16206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3227 IncrementalHoareTripleChecker+Valid, 12979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:42:11,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 442 Invalid, 16206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3227 Valid, 12979 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2023-12-18 19:42:11,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-12-18 19:42:11,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 152. [2023-12-18 19:42:11,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.086092715231788) internal successors, (164), 151 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:42:11,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 164 transitions. [2023-12-18 19:42:11,740 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 164 transitions. Word has length 74 [2023-12-18 19:42:11,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:42:11,740 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 164 transitions. [2023-12-18 19:42:11,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.0515463917525774) internal successors, (204), 194 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:42:11,741 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 164 transitions. [2023-12-18 19:42:11,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-18 19:42:11,742 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:42:11,742 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:42:11,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-18 19:42:11,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:42:11,948 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:42:11,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:42:11,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1010472840, now seen corresponding path program 28 times [2023-12-18 19:42:11,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:42:11,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624283369] [2023-12-18 19:42:11,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:42:11,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:42:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:42:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-12-18 19:42:12,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:42:12,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624283369] [2023-12-18 19:42:12,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624283369] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:42:12,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936823216] [2023-12-18 19:42:12,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:42:12,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:42:12,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:42:12,279 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 19:42:12,280 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 19:42:12,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:42:12,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:42:12,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-18 19:42:12,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:42:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-12-18 19:42:12,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:42:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-12-18 19:42:13,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936823216] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:42:13,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:42:13,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 69 [2023-12-18 19:42:13,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065118324] [2023-12-18 19:42:13,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:42:13,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-12-18 19:42:13,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:42:13,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-12-18 19:42:13,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=723, Invalid=3969, Unknown=0, NotChecked=0, Total=4692 [2023-12-18 19:42:13,508 INFO L87 Difference]: Start difference. First operand 152 states and 164 transitions. Second operand has 69 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 69 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:42:14,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:42:14,297 INFO L93 Difference]: Finished difference Result 202 states and 218 transitions. [2023-12-18 19:42:14,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-18 19:42:14,298 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 69 states have internal predecessors, (88), 0 states have call successors, (0), 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 19:42:14,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:42:14,298 INFO L225 Difference]: With dead ends: 202 [2023-12-18 19:42:14,298 INFO L226 Difference]: Without dead ends: 80 [2023-12-18 19:42:14,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 99 SyntacticMatches, 14 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4764 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1689, Invalid=10083, Unknown=0, NotChecked=0, Total=11772 [2023-12-18 19:42:14,299 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 103 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1423 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 1423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 19:42:14,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 45 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 1423 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 19:42:14,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-18 19:42:14,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-12-18 19:42:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 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 19:42:14,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2023-12-18 19:42:14,375 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 75 [2023-12-18 19:42:14,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:42:14,375 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2023-12-18 19:42:14,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 69 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:42:14,376 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2023-12-18 19:42:14,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-18 19:42:14,376 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:42:14,376 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:42:14,386 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 19:42:14,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:42:14,580 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:42:14,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:42:14,581 INFO L85 PathProgramCache]: Analyzing trace with hash 219977731, now seen corresponding path program 29 times [2023-12-18 19:42:14,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:42:14,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262012661] [2023-12-18 19:42:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:42:14,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:42:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:42:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 45 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:42:25,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:42:25,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262012661] [2023-12-18 19:42:25,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262012661] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:42:25,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672714810] [2023-12-18 19:42:25,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:42:25,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:42:25,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:42:25,890 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 19:42:25,891 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 19:42:26,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-18 19:42:26,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:42:26,592 WARN L260 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 270 conjunts are in the unsatisfiable core [2023-12-18 19:42:26,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:42:26,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:42:26,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:42:26,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:42:26,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:42:26,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:42:26,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:42:26,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:42:26,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:42:27,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:42:27,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:42:27,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:42:27,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:42:27,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:42:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:42:32,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:42:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 364 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-18 19:42:41,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672714810] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:42:41,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:42:41,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 70, 58] total 194 [2023-12-18 19:42:41,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961869332] [2023-12-18 19:42:41,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:42:41,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2023-12-18 19:42:41,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:42:41,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2023-12-18 19:42:41,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=36225, Unknown=0, NotChecked=0, Total=37442 [2023-12-18 19:42:41,723 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 194 states, 194 states have (on average 1.1082474226804124) internal successors, (215), 194 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:42:56,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:42:56,119 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2023-12-18 19:42:56,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-12-18 19:42:56,119 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.1082474226804124) internal successors, (215), 194 states have internal predecessors, (215), 0 states have call successors, (0), 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 79 [2023-12-18 19:42:56,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:42:56,120 INFO L225 Difference]: With dead ends: 139 [2023-12-18 19:42:56,120 INFO L226 Difference]: Without dead ends: 135 [2023-12-18 19:42:56,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22587 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=2433, Invalid=62337, Unknown=0, NotChecked=0, Total=64770 [2023-12-18 19:42:56,122 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 7481 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 7665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 7481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:42:56,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 393 Invalid, 7665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 7481 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-12-18 19:42:56,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-12-18 19:42:56,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 113. [2023-12-18 19:42:56,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 112 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 19:42:56,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 120 transitions. [2023-12-18 19:42:56,250 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 120 transitions. Word has length 79 [2023-12-18 19:42:56,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:42:56,250 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 120 transitions. [2023-12-18 19:42:56,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.1082474226804124) internal successors, (215), 194 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:42:56,251 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 120 transitions. [2023-12-18 19:42:56,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-18 19:42:56,251 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:42:56,251 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:42:56,258 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 19:42:56,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:42:56,458 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:42:56,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:42:56,459 INFO L85 PathProgramCache]: Analyzing trace with hash 930872893, now seen corresponding path program 30 times [2023-12-18 19:42:56,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:42:56,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327451280] [2023-12-18 19:42:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:42:56,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:42:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:42:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 92 proven. 104 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-12-18 19:42:56,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:42:56,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327451280] [2023-12-18 19:42:56,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327451280] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:42:56,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55089045] [2023-12-18 19:42:56,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:42:56,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:42:56,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:42:56,917 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 19:42:56,919 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 19:42:57,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-12-18 19:42:57,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:42:57,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-18 19:42:57,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:42:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-12-18 19:42:57,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:42:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-12-18 19:42:58,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55089045] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:42:58,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:42:58,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 74 [2023-12-18 19:42:58,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764619125] [2023-12-18 19:42:58,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:42:58,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-12-18 19:42:58,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:42:58,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-12-18 19:42:58,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=4575, Unknown=0, NotChecked=0, Total=5402 [2023-12-18 19:42:58,533 INFO L87 Difference]: Start difference. First operand 113 states and 120 transitions. Second operand has 74 states, 74 states have (on average 1.337837837837838) internal successors, (99), 74 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 19:42:59,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:42:59,539 INFO L93 Difference]: Finished difference Result 227 states and 244 transitions. [2023-12-18 19:42:59,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-18 19:42:59,539 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.337837837837838) internal successors, (99), 74 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) Word has length 80 [2023-12-18 19:42:59,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:42:59,539 INFO L225 Difference]: With dead ends: 227 [2023-12-18 19:42:59,539 INFO L226 Difference]: Without dead ends: 85 [2023-12-18 19:42:59,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 105 SyntacticMatches, 15 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5537 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1930, Invalid=11642, Unknown=0, NotChecked=0, Total=13572 [2023-12-18 19:42:59,541 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1817 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 1817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-18 19:42:59,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 44 Invalid, 2471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 1817 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-18 19:42:59,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-18 19:42:59,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-12-18 19:42:59,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 84 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:42:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2023-12-18 19:42:59,633 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 80 [2023-12-18 19:42:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:42:59,633 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2023-12-18 19:42:59,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.337837837837838) internal successors, (99), 74 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 19:42:59,633 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2023-12-18 19:42:59,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-18 19:42:59,633 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:42:59,633 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:42:59,643 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 19:42:59,839 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,SelfDestructingSolverStorable32 [2023-12-18 19:42:59,839 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:42:59,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:42:59,839 INFO L85 PathProgramCache]: Analyzing trace with hash -365755760, now seen corresponding path program 31 times [2023-12-18 19:42:59,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:42:59,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904618059] [2023-12-18 19:42:59,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:42:59,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:42:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:43:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 55 proven. 470 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:43:12,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:43:12,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904618059] [2023-12-18 19:43:12,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904618059] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:43:12,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932445352] [2023-12-18 19:43:12,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:43:12,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:12,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:43:12,440 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 19:43:12,441 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 19:43:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:43:12,594 WARN L260 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 264 conjunts are in the unsatisfiable core [2023-12-18 19:43:12,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:43:13,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:43:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:43:20,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:43:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-18 19:43:32,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932445352] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:43:32,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:43:32,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 75, 62] total 208 [2023-12-18 19:43:32,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27528169] [2023-12-18 19:43:32,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:43:32,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 208 states [2023-12-18 19:43:32,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:43:32,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2023-12-18 19:43:32,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1200, Invalid=41856, Unknown=0, NotChecked=0, Total=43056 [2023-12-18 19:43:32,823 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 208 states, 208 states have (on average 1.1009615384615385) internal successors, (229), 208 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:47,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:43:47,850 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2023-12-18 19:43:47,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-12-18 19:43:47,851 INFO L78 Accepts]: Start accepts. Automaton has has 208 states, 208 states have (on average 1.1009615384615385) internal successors, (229), 208 states have internal predecessors, (229), 0 states have call successors, (0), 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 84 [2023-12-18 19:43:47,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:43:47,851 INFO L225 Difference]: With dead ends: 147 [2023-12-18 19:43:47,851 INFO L226 Difference]: Without dead ends: 143 [2023-12-18 19:43:47,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21306 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=2189, Invalid=65151, Unknown=0, NotChecked=0, Total=67340 [2023-12-18 19:43:47,854 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 55 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 9075 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 9191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 9075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:43:47,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 445 Invalid, 9191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 9075 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-12-18 19:43:47,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-12-18 19:43:47,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 120. [2023-12-18 19:43:47,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0672268907563025) internal successors, (127), 119 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:47,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 127 transitions. [2023-12-18 19:43:47,994 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 127 transitions. Word has length 84 [2023-12-18 19:43:47,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:43:47,994 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 127 transitions. [2023-12-18 19:43:47,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 208 states, 208 states have (on average 1.1009615384615385) internal successors, (229), 208 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:47,994 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 127 transitions. [2023-12-18 19:43:47,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-18 19:43:47,995 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:43:47,995 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:43:48,001 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 19:43:48,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:48,201 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:43:48,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:43:48,201 INFO L85 PathProgramCache]: Analyzing trace with hash -807204904, now seen corresponding path program 32 times [2023-12-18 19:43:48,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:43:48,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914327248] [2023-12-18 19:43:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:43:48,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:43:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:43:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 106 proven. 119 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-12-18 19:43:48,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:43:48,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914327248] [2023-12-18 19:43:48,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914327248] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:43:48,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559724982] [2023-12-18 19:43:48,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:43:48,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:48,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:43:48,676 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 19:43:48,677 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 19:43:48,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:43:48,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:43:48,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-18 19:43:48,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:43:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-12-18 19:43:49,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:43:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-12-18 19:43:49,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559724982] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:43:49,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:43:49,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-12-18 19:43:49,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096285897] [2023-12-18 19:43:49,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:43:49,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-18 19:43:49,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:43:49,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-18 19:43:49,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-12-18 19:43:49,577 INFO L87 Difference]: Start difference. First operand 120 states and 127 transitions. Second operand has 50 states, 50 states have (on average 1.32) internal successors, (66), 50 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 19:43:50,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:43:50,272 INFO L93 Difference]: Finished difference Result 249 states and 264 transitions. [2023-12-18 19:43:50,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-18 19:43:50,272 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.32) internal successors, (66), 50 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 85 [2023-12-18 19:43:50,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:43:50,273 INFO L225 Difference]: With dead ends: 249 [2023-12-18 19:43:50,273 INFO L226 Difference]: Without dead ends: 131 [2023-12-18 19:43:50,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 124 SyntacticMatches, 29 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2023-12-18 19:43:50,274 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 105 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:43:50,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 39 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 19:43:50,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-12-18 19:43:50,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2023-12-18 19:43:50,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0583333333333333) internal successors, (127), 120 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:43:50,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions. [2023-12-18 19:43:50,420 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 85 [2023-12-18 19:43:50,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:43:50,420 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 127 transitions. [2023-12-18 19:43:50,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.32) internal successors, (66), 50 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 19:43:50,420 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions. [2023-12-18 19:43:50,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-18 19:43:50,420 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:43:50,421 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:43:50,426 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 19:43:50,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:50,626 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:43:50,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:43:50,626 INFO L85 PathProgramCache]: Analyzing trace with hash 603687969, now seen corresponding path program 33 times [2023-12-18 19:43:50,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:43:50,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668201937] [2023-12-18 19:43:50,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:43:50,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:43:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:43:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 91 proven. 134 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-12-18 19:43:51,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:43:51,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668201937] [2023-12-18 19:43:51,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668201937] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:43:51,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568500295] [2023-12-18 19:43:51,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:43:51,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:43:51,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:43:51,226 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 19:43:51,227 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 19:43:51,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-18 19:43:51,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:43:51,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-18 19:43:51,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:43:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-12-18 19:43:51,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:43:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-12-18 19:43:52,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568500295] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:43:52,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:43:52,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-12-18 19:43:52,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621505883] [2023-12-18 19:43:52,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:43:52,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-18 19:43:52,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:43:52,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-18 19:43:52,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-12-18 19:43:52,110 INFO L87 Difference]: Start difference. First operand 121 states and 127 transitions. Second operand has 50 states, 50 states have (on average 1.32) internal successors, (66), 50 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 19:43:52,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:43:52,687 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2023-12-18 19:43:52,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-18 19:43:52,688 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.32) internal successors, (66), 50 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 86 [2023-12-18 19:43:52,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:43:52,688 INFO L225 Difference]: With dead ends: 126 [2023-12-18 19:43:52,688 INFO L226 Difference]: Without dead ends: 90 [2023-12-18 19:43:52,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 125 SyntacticMatches, 30 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2217 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=997, Invalid=3425, Unknown=0, NotChecked=0, Total=4422 [2023-12-18 19:43:52,689 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 78 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 19:43:52,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 26 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 19:43:52,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-18 19:43:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-12-18 19:43:52,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 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 19:43:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2023-12-18 19:43:52,791 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 86 [2023-12-18 19:43:52,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:43:52,791 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2023-12-18 19:43:52,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.32) internal successors, (66), 50 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 19:43:52,791 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2023-12-18 19:43:52,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-18 19:43:52,791 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:43:52,791 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:43:52,800 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 19:43:52,998 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,SelfDestructingSolverStorable35 [2023-12-18 19:43:52,998 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:43:52,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:43:52,998 INFO L85 PathProgramCache]: Analyzing trace with hash -355201821, now seen corresponding path program 34 times [2023-12-18 19:43:52,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:43:52,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622444881] [2023-12-18 19:43:52,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:43:52,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:43:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:44:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 48 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:44:08,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:44:08,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622444881] [2023-12-18 19:44:08,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622444881] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:44:08,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514354554] [2023-12-18 19:44:08,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:44:08,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:44:08,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:44:08,307 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 19:44:08,309 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 19:44:08,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:44:08,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:44:08,621 WARN L260 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 257 conjunts are in the unsatisfiable core [2023-12-18 19:44:08,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:44:08,731 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 19 treesize of output 1 [2023-12-18 19:44:08,744 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 19 treesize of output 1 [2023-12-18 19:44:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 480 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-12-18 19:44:17,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:44:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-18 19:44:31,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514354554] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:44:31,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:44:31,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 66, 68] total 211 [2023-12-18 19:44:31,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349380546] [2023-12-18 19:44:31,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:44:31,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 211 states [2023-12-18 19:44:31,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:44:31,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2023-12-18 19:44:31,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=42955, Unknown=0, NotChecked=0, Total=44310 [2023-12-18 19:44:31,165 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 211 states, 211 states have (on average 1.099526066350711) internal successors, (232), 211 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:44:56,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:44:56,114 INFO L93 Difference]: Finished difference Result 155 states and 164 transitions. [2023-12-18 19:44:56,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-12-18 19:44:56,115 INFO L78 Accepts]: Start accepts. Automaton has has 211 states, 211 states have (on average 1.099526066350711) internal successors, (232), 211 states have internal predecessors, (232), 0 states have call successors, (0), 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 19:44:56,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:44:56,115 INFO L225 Difference]: With dead ends: 155 [2023-12-18 19:44:56,116 INFO L226 Difference]: Without dead ends: 151 [2023-12-18 19:44:56,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22483 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=2973, Invalid=72377, Unknown=0, NotChecked=0, Total=75350 [2023-12-18 19:44:56,118 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 141 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 9792 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 10078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 9792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-12-18 19:44:56,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 421 Invalid, 10078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 9792 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2023-12-18 19:44:56,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-12-18 19:44:56,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 127. [2023-12-18 19:44:56,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0634920634920635) internal successors, (134), 126 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:44:56,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 134 transitions. [2023-12-18 19:44:56,274 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 134 transitions. Word has length 89 [2023-12-18 19:44:56,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:44:56,274 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 134 transitions. [2023-12-18 19:44:56,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 211 states, 211 states have (on average 1.099526066350711) internal successors, (232), 211 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:44:56,274 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 134 transitions. [2023-12-18 19:44:56,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-18 19:44:56,275 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:44:56,282 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:44:56,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-12-18 19:44:56,487 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,SelfDestructingSolverStorable36 [2023-12-18 19:44:56,488 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:44:56,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:44:56,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1109474013, now seen corresponding path program 35 times [2023-12-18 19:44:56,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:44:56,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645191825] [2023-12-18 19:44:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:44:56,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:44:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:44:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 121 proven. 135 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2023-12-18 19:44:57,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:44:57,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645191825] [2023-12-18 19:44:57,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645191825] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:44:57,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442029979] [2023-12-18 19:44:57,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:44:57,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:44:57,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:44:57,024 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 19:44:57,026 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 19:44:58,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-12-18 19:44:58,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:44:58,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-18 19:44:58,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:44:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2023-12-18 19:44:59,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:44:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2023-12-18 19:44:59,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442029979] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:44:59,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:44:59,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 84 [2023-12-18 19:44:59,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926434956] [2023-12-18 19:44:59,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:44:59,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-12-18 19:44:59,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:44:59,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-12-18 19:44:59,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=5916, Unknown=0, NotChecked=0, Total=6972 [2023-12-18 19:44:59,696 INFO L87 Difference]: Start difference. First operand 127 states and 134 transitions. Second operand has 84 states, 84 states have (on average 1.2619047619047619) internal successors, (106), 84 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:45:00,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:45:00,958 INFO L93 Difference]: Finished difference Result 255 states and 272 transitions. [2023-12-18 19:45:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-12-18 19:45:00,959 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.2619047619047619) internal successors, (106), 84 states have internal predecessors, (106), 0 states have call successors, (0), 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 19:45:00,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:45:00,959 INFO L225 Difference]: With dead ends: 255 [2023-12-18 19:45:00,959 INFO L226 Difference]: Without dead ends: 95 [2023-12-18 19:45:00,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 117 SyntacticMatches, 17 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7257 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2460, Invalid=15096, Unknown=0, NotChecked=0, Total=17556 [2023-12-18 19:45:00,961 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2703 mSolverCounterSat, 777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 3480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 777 IncrementalHoareTripleChecker+Valid, 2703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-18 19:45:00,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 62 Invalid, 3480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [777 Valid, 2703 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-18 19:45:00,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-18 19:45:01,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-12-18 19:45:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.053191489361702) internal successors, (99), 94 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 19:45:01,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2023-12-18 19:45:01,065 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 90 [2023-12-18 19:45:01,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:45:01,065 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2023-12-18 19:45:01,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.2619047619047619) internal successors, (106), 84 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:45:01,065 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2023-12-18 19:45:01,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-12-18 19:45:01,065 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:45:01,065 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:45:01,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-12-18 19:45:01,273 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,SelfDestructingSolverStorable37 [2023-12-18 19:45:01,273 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:45:01,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:45:01,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1911851952, now seen corresponding path program 36 times [2023-12-18 19:45:01,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:45:01,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82154503] [2023-12-18 19:45:01,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:45:01,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:45:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:45:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 91 proven. 589 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:45:19,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:45:19,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82154503] [2023-12-18 19:45:19,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82154503] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:45:19,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164612240] [2023-12-18 19:45:19,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:45:19,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:45:19,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:45:19,393 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 19:45:19,394 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 19:45:20,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-12-18 19:45:20,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:45:20,498 WARN L260 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 343 conjunts are in the unsatisfiable core [2023-12-18 19:45:20,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:45:20,751 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 19:45:20,829 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 19:45:20,921 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:45:20,921 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 19:45:21,022 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:45:21,023 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 19:45:21,122 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:45:21,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-18 19:45:21,267 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:45:21,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-12-18 19:45:21,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:45:21,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 61 [2023-12-18 19:45:21,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:45:21,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 61 [2023-12-18 19:45:21,658 INFO L349 Elim1Store]: treesize reduction 120, result has 35.8 percent of original size [2023-12-18 19:45:21,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 66 treesize of output 85 [2023-12-18 19:45:21,857 INFO L349 Elim1Store]: treesize reduction 120, result has 35.8 percent of original size [2023-12-18 19:45:21,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 90 treesize of output 109 [2023-12-18 19:45:22,078 INFO L349 Elim1Store]: treesize reduction 108, result has 38.3 percent of original size [2023-12-18 19:45:22,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 104 treesize of output 127 [2023-12-18 19:45:37,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:45:37,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:45:37,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 24 select indices, 24 select index equivalence classes, 198 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 276 case distinctions, treesize of input 184 treesize of output 666 [2023-12-18 19:45:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:45:38,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:46:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 589 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-18 19:46:00,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164612240] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:46:00,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:46:00,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 91, 77] total 249 [2023-12-18 19:46:00,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334942403] [2023-12-18 19:46:00,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:46:00,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 249 states [2023-12-18 19:46:00,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:46:00,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 249 interpolants. [2023-12-18 19:46:00,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3312, Invalid=58440, Unknown=0, NotChecked=0, Total=61752 [2023-12-18 19:46:00,063 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 249 states, 249 states have (on average 1.0522088353413654) internal successors, (262), 249 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:46:26,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:47:13,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:47:13,666 INFO L93 Difference]: Finished difference Result 217 states and 246 transitions. [2023-12-18 19:47:13,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2023-12-18 19:47:13,666 INFO L78 Accepts]: Start accepts. Automaton has has 249 states, 249 states have (on average 1.0522088353413654) internal successors, (262), 249 states have internal predecessors, (262), 0 states have call successors, (0), 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 94 [2023-12-18 19:47:13,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:47:13,667 INFO L225 Difference]: With dead ends: 217 [2023-12-18 19:47:13,667 INFO L226 Difference]: Without dead ends: 153 [2023-12-18 19:47:13,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 363 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39030 ImplicationChecksByTransitivity, 96.1s TimeCoverageRelationStatistics Valid=10177, Invalid=122683, Unknown=0, NotChecked=0, Total=132860 [2023-12-18 19:47:13,672 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 377 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 13280 mSolverCounterSat, 1680 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 14961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1680 IncrementalHoareTripleChecker+Valid, 13280 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2023-12-18 19:47:13,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 257 Invalid, 14961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1680 Valid, 13280 Invalid, 1 Unknown, 0 Unchecked, 16.5s Time] [2023-12-18 19:47:13,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-12-18 19:47:13,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 98. [2023-12-18 19:47:13,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 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 19:47:13,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2023-12-18 19:47:13,793 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 94 [2023-12-18 19:47:13,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:47:13,793 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2023-12-18 19:47:13,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 249 states, 249 states have (on average 1.0522088353413654) internal successors, (262), 249 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:47:13,793 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2023-12-18 19:47:13,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-18 19:47:13,793 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:47:13,793 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:47:13,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-12-18 19:47:14,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-18 19:47:14,001 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:47:14,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:47:14,002 INFO L85 PathProgramCache]: Analyzing trace with hash -470073544, now seen corresponding path program 37 times [2023-12-18 19:47:14,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:47:14,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867695887] [2023-12-18 19:47:14,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:47:14,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:47:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:47:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 137 proven. 152 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2023-12-18 19:47:14,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:47:14,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867695887] [2023-12-18 19:47:14,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867695887] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:47:14,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905255638] [2023-12-18 19:47:14,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:47:14,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:47:14,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:47:14,552 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 19:47:14,557 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 19:47:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:47:14,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-18 19:47:14,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:47:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2023-12-18 19:47:15,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:47:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2023-12-18 19:47:15,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905255638] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:47:15,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:47:15,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2023-12-18 19:47:15,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900841622] [2023-12-18 19:47:15,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:47:15,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-12-18 19:47:15,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:47:15,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-12-18 19:47:15,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2023-12-18 19:47:15,450 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand has 56 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:47:16,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:47:16,272 INFO L93 Difference]: Finished difference Result 241 states and 254 transitions. [2023-12-18 19:47:16,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-18 19:47:16,272 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2023-12-18 19:47:16,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:47:16,273 INFO L225 Difference]: With dead ends: 241 [2023-12-18 19:47:16,273 INFO L226 Difference]: Without dead ends: 145 [2023-12-18 19:47:16,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 138 SyntacticMatches, 33 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1235, Invalid=4021, Unknown=0, NotChecked=0, Total=5256 [2023-12-18 19:47:16,273 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 698 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 698 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 19:47:16,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 42 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [698 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 19:47:16,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-12-18 19:47:16,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 135. [2023-12-18 19:47:16,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0522388059701493) internal successors, (141), 134 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:47:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 141 transitions. [2023-12-18 19:47:16,483 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 141 transitions. Word has length 95 [2023-12-18 19:47:16,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:47:16,483 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 141 transitions. [2023-12-18 19:47:16,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:47:16,484 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 141 transitions. [2023-12-18 19:47:16,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-18 19:47:16,484 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:47:16,484 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:47:16,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-12-18 19:47:16,689 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,SelfDestructingSolverStorable39 [2023-12-18 19:47:16,689 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:47:16,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:47:16,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1534442561, now seen corresponding path program 38 times [2023-12-18 19:47:16,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:47:16,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995149712] [2023-12-18 19:47:16,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:47:16,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:47:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:47:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 120 proven. 169 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-12-18 19:47:17,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:47:17,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995149712] [2023-12-18 19:47:17,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995149712] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:47:17,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309298633] [2023-12-18 19:47:17,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:47:17,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:47:17,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:47:17,269 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 19:47:17,271 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 19:47:17,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:47:17,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:47:17,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-18 19:47:17,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:47:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-12-18 19:47:17,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:47:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-12-18 19:47:18,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309298633] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:47:18,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:47:18,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2023-12-18 19:47:18,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635925332] [2023-12-18 19:47:18,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:47:18,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-12-18 19:47:18,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:47:18,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-12-18 19:47:18,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2023-12-18 19:47:18,236 INFO L87 Difference]: Start difference. First operand 135 states and 141 transitions. Second operand has 56 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:47:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:47:18,911 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2023-12-18 19:47:18,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-18 19:47:18,911 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2023-12-18 19:47:18,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:47:18,911 INFO L225 Difference]: With dead ends: 140 [2023-12-18 19:47:18,911 INFO L226 Difference]: Without dead ends: 100 [2023-12-18 19:47:18,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 139 SyntacticMatches, 34 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2821 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1246, Invalid=4304, Unknown=0, NotChecked=0, Total=5550 [2023-12-18 19:47:18,912 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 88 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 638 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 638 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 19:47:18,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 29 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [638 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 19:47:18,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-18 19:47:19,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-12-18 19:47:19,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 99 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 19:47:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2023-12-18 19:47:19,040 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 96 [2023-12-18 19:47:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:47:19,041 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2023-12-18 19:47:19,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:47:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2023-12-18 19:47:19,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-18 19:47:19,041 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:47:19,041 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:47:19,047 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 19:47:19,242 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,SelfDestructingSolverStorable40 [2023-12-18 19:47:19,242 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:47:19,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:47:19,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1222990275, now seen corresponding path program 39 times [2023-12-18 19:47:19,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:47:19,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567539034] [2023-12-18 19:47:19,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:47:19,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:47:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:47:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 105 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:47:38,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:47:38,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567539034] [2023-12-18 19:47:38,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567539034] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:47:38,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390588483] [2023-12-18 19:47:38,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:47:38,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:47:38,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:47:38,905 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 19:47:38,906 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 19:47:39,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-12-18 19:47:39,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:47:39,510 WARN L260 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 321 conjunts are in the unsatisfiable core [2023-12-18 19:47:39,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:47:39,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-18 19:47:39,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-18 19:47:39,661 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 23 treesize of output 1 [2023-12-18 19:47:39,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-18 19:47:39,673 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 19 treesize of output 1 [2023-12-18 19:48:02,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:48:02,548 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:48:02,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 84 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 146 treesize of output 381 [2023-12-18 19:48:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 16 proven. 629 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-12-18 19:48:03,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:48:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 720 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-18 19:48:29,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390588483] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:48:29,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:48:29,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 81, 88] total 257 [2023-12-18 19:48:29,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023005279] [2023-12-18 19:48:29,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:48:29,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 257 states [2023-12-18 19:48:29,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:48:29,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 257 interpolants. [2023-12-18 19:48:29,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3179, Invalid=62611, Unknown=2, NotChecked=0, Total=65792 [2023-12-18 19:48:29,032 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 257 states, 257 states have (on average 1.046692607003891) internal successors, (269), 257 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:49:34,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:49:34,559 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2023-12-18 19:49:34,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2023-12-18 19:49:34,559 INFO L78 Accepts]: Start accepts. Automaton has has 257 states, 257 states have (on average 1.046692607003891) internal successors, (269), 257 states have internal predecessors, (269), 0 states have call successors, (0), 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 99 [2023-12-18 19:49:34,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:49:34,560 INFO L225 Difference]: With dead ends: 171 [2023-12-18 19:49:34,560 INFO L226 Difference]: Without dead ends: 167 [2023-12-18 19:49:34,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37226 ImplicationChecksByTransitivity, 104.8s TimeCoverageRelationStatistics Valid=8556, Invalid=122848, Unknown=2, NotChecked=0, Total=131406 [2023-12-18 19:49:34,566 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 221 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 12885 mSolverCounterSat, 993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 13878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 993 IncrementalHoareTripleChecker+Valid, 12885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2023-12-18 19:49:34,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 472 Invalid, 13878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [993 Valid, 12885 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2023-12-18 19:49:34,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-12-18 19:49:34,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 141. [2023-12-18 19:49:34,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0571428571428572) internal successors, (148), 140 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:49:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 148 transitions. [2023-12-18 19:49:34,807 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 148 transitions. Word has length 99 [2023-12-18 19:49:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:49:34,807 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 148 transitions. [2023-12-18 19:49:34,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 257 states, 257 states have (on average 1.046692607003891) internal successors, (269), 257 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:49:34,808 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 148 transitions. [2023-12-18 19:49:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-18 19:49:34,808 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:49:34,808 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:49:34,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-12-18 19:49:35,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-12-18 19:49:35,013 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:49:35,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:49:35,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1596809085, now seen corresponding path program 40 times [2023-12-18 19:49:35,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:49:35,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702131153] [2023-12-18 19:49:35,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:49:35,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:49:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:49:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 154 proven. 170 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2023-12-18 19:49:35,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:49:35,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702131153] [2023-12-18 19:49:35,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702131153] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:49:35,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740713708] [2023-12-18 19:49:35,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:49:35,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:49:35,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:49:35,659 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 19:49:35,661 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 19:49:35,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:49:35,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:49:35,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-18 19:49:35,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:49:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2023-12-18 19:49:36,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:49:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2023-12-18 19:49:37,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740713708] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:49:37,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:49:37,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 94 [2023-12-18 19:49:37,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341771510] [2023-12-18 19:49:37,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:49:37,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2023-12-18 19:49:37,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:49:37,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2023-12-18 19:49:37,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1313, Invalid=7429, Unknown=0, NotChecked=0, Total=8742 [2023-12-18 19:49:37,655 INFO L87 Difference]: Start difference. First operand 141 states and 148 transitions. Second operand has 94 states, 94 states have (on average 1.202127659574468) internal successors, (113), 94 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 19:49:39,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:49:39,371 INFO L93 Difference]: Finished difference Result 283 states and 300 transitions. [2023-12-18 19:49:39,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-12-18 19:49:39,372 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.202127659574468) internal successors, (113), 94 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 100 [2023-12-18 19:49:39,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:49:39,372 INFO L225 Difference]: With dead ends: 283 [2023-12-18 19:49:39,372 INFO L226 Difference]: Without dead ends: 105 [2023-12-18 19:49:39,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 129 SyntacticMatches, 19 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9209 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3054, Invalid=18998, Unknown=0, NotChecked=0, Total=22052 [2023-12-18 19:49:39,375 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 167 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 2802 mSolverCounterSat, 768 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 768 IncrementalHoareTripleChecker+Valid, 2802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:49:39,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 53 Invalid, 3570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [768 Valid, 2802 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-18 19:49:39,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-12-18 19:49:39,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-12-18 19:49:39,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0480769230769231) internal successors, (109), 104 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:49:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2023-12-18 19:49:39,552 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 100 [2023-12-18 19:49:39,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:49:39,553 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2023-12-18 19:49:39,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.202127659574468) internal successors, (113), 94 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 19:49:39,553 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2023-12-18 19:49:39,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-12-18 19:49:39,553 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:49:39,553 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:49:39,559 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 19:49:39,759 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,SelfDestructingSolverStorable42 [2023-12-18 19:49:39,759 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:49:39,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:49:39,759 INFO L85 PathProgramCache]: Analyzing trace with hash -800604976, now seen corresponding path program 41 times [2023-12-18 19:49:39,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:49:39,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282123624] [2023-12-18 19:49:39,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:49:39,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:49:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:50:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 10 proven. 845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:50:06,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:50:06,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282123624] [2023-12-18 19:50:06,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282123624] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:50:06,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677248845] [2023-12-18 19:50:06,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:50:06,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:50:06,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:50:06,650 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 19:50:06,652 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 19:50:14,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-12-18 19:50:14,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:50:14,609 WARN L260 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 398 conjunts are in the unsatisfiable core [2023-12-18 19:50:14,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:50:14,762 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 19:50:14,863 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 19:50:14,965 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:50:14,965 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 19:50:15,071 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:50:15,071 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 19:50:15,180 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:50:15,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-18 19:50:15,310 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:50:15,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-12-18 19:50:15,419 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:50:15,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-12-18 19:50:15,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:50:15,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2023-12-18 19:50:15,683 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:50:15,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2023-12-18 19:50:15,830 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:50:15,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 98 [2023-12-18 19:50:15,986 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:50:15,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 55 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 82 treesize of output 108 [2023-12-18 19:50:16,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:50:16,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 66 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 89 treesize of output 118 [2023-12-18 19:50:16,388 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:50:16,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 78 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 96 treesize of output 128 [2023-12-18 19:50:16,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:50:16,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 91 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 103 treesize of output 138 [2023-12-18 19:50:16,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:50:16,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 105 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 110 treesize of output 148 [2023-12-18 19:50:17,026 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:50:17,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 120 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 117 treesize of output 158 [2023-12-18 19:50:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:50:35,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:51:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 684 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-12-18 19:51:06,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677248845] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:51:06,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:51:06,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 96, 78] total 265 [2023-12-18 19:51:06,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526466367] [2023-12-18 19:51:06,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:51:06,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 265 states [2023-12-18 19:51:06,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:51:06,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 265 interpolants. [2023-12-18 19:51:06,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=68596, Unknown=0, NotChecked=0, Total=69960 [2023-12-18 19:51:06,181 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 265 states, 265 states have (on average 1.0754716981132075) internal successors, (285), 265 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2023-12-18 19:51:11,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-18 19:51:11,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21146 ImplicationChecksByTransitivity, 58.6s TimeCoverageRelationStatistics Valid=1422, Invalid=74478, Unknown=0, NotChecked=0, Total=75900 [2023-12-18 19:51:11,549 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2596 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 2599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-18 19:51:11,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 2599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2596 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-18 19:51:11,550 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 19:51:11,563 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 19:51:11,570 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 19:51:11,570 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 19:51:11,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:51:11,761 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (105states) and FLOYD_HOARE automaton (currently 17 states, 265 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-18-2-14-1 term,while SimplifyDDA2 was simplifying 17 xjuncts wrt. a ATOM-1 context. [2023-12-18 19:51:11,765 INFO L445 BasicCegarLoop]: Path program histogram: [41, 1, 1, 1] [2023-12-18 19:51:11,766 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 19:51:11,767 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 07:51:11 BoogieIcfgContainer [2023-12-18 19:51:11,768 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 19:51:11,768 INFO L158 Benchmark]: Toolchain (without parser) took 845017.25ms. Allocated memory was 288.4MB in the beginning and 1.8GB in the end (delta: 1.5GB). Free memory was 234.6MB in the beginning and 873.3MB in the end (delta: -638.8MB). Peak memory consumption was 890.6MB. Max. memory is 8.0GB. [2023-12-18 19:51:11,768 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 229.6MB. Free memory is still 178.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 19:51:11,768 INFO L158 Benchmark]: CACSL2BoogieTranslator took 181.05ms. Allocated memory is still 288.4MB. Free memory was 234.3MB in the beginning and 223.0MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 19:51:11,768 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.71ms. Allocated memory is still 288.4MB. Free memory was 223.0MB in the beginning and 221.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-18 19:51:11,768 INFO L158 Benchmark]: Boogie Preprocessor took 31.68ms. Allocated memory is still 288.4MB. Free memory was 221.5MB in the beginning and 219.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 19:51:11,768 INFO L158 Benchmark]: RCFGBuilder took 235.24ms. Allocated memory is still 288.4MB. Free memory was 219.6MB in the beginning and 206.2MB in the end (delta: 13.3MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-18 19:51:11,769 INFO L158 Benchmark]: TraceAbstraction took 844537.23ms. Allocated memory was 288.4MB in the beginning and 1.8GB in the end (delta: 1.5GB). Free memory was 205.5MB in the beginning and 873.3MB in the end (delta: -667.8MB). Peak memory consumption was 862.2MB. Max. memory is 8.0GB. [2023-12-18 19:51:11,769 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 229.6MB. Free memory is still 178.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 181.05ms. Allocated memory is still 288.4MB. Free memory was 234.3MB in the beginning and 223.0MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.71ms. Allocated memory is still 288.4MB. Free memory was 223.0MB in the beginning and 221.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.68ms. Allocated memory is still 288.4MB. Free memory was 221.5MB in the beginning and 219.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 235.24ms. Allocated memory is still 288.4MB. Free memory was 219.6MB in the beginning and 206.2MB in the end (delta: 13.3MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 844537.23ms. Allocated memory was 288.4MB in the beginning and 1.8GB in the end (delta: 1.5GB). Free memory was 205.5MB in the beginning and 873.3MB in the end (delta: -667.8MB). Peak memory consumption was 862.2MB. 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: 8]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 8). Cancelled while NwaCegarLoop was constructing difference of abstraction (105states) and FLOYD_HOARE automaton (currently 17 states, 265 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-18-2-14-1 term,while SimplifyDDA2 was simplifying 17 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 844.5s, OverallIterations: 44, TraceHistogramMax: 18, PathProgramHistogramMax: 41, EmptinessCheckTime: 0.0s, AutomataDifference: 375.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 3869 SdHoareTripleChecker+Valid, 89.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3869 mSDsluCounter, 5941 SdHoareTripleChecker+Invalid, 80.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5515 mSDsCounter, 16728 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 119503 IncrementalHoareTripleChecker+Invalid, 136232 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16728 mSolverCounterUnsat, 426 mSDtfsCounter, 119503 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8002 GetRequests, 2625 SyntacticMatches, 371 SemanticMatches, 5005 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310281 ImplicationChecksByTransitivity, 591.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=152occurred in iteration=30, InterpolantAutomatonStates: 1827, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 43 MinimizatonAttempts, 461 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 14.8s SatisfiabilityAnalysisTime, 439.7s InterpolantComputationTime, 5079 NumberOfCodeBlocks, 5071 NumberOfCodeBlocksAsserted, 201 NumberOfCheckSat, 7471 ConstructedInterpolants, 16 QuantifiedInterpolants, 254644 SizeOfPredicates, 214 NumberOfNonLiveVariables, 12919 ConjunctsInSsa, 3895 ConjunctsInUnsatCore, 126 InterpolantComputations, 3 PerfectInterpolantSequences, 18202/38221 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