/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_sum3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 19:29:16,221 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 19:29:16,285 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 19:29:16,289 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 19:29:16,289 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 19:29:16,317 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 19:29:16,318 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 19:29:16,318 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 19:29:16,318 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 19:29:16,321 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 19:29:16,321 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 19:29:16,322 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 19:29:16,322 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 19:29:16,323 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 19:29:16,323 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 19:29:16,323 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 19:29:16,324 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 19:29:16,324 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 19:29:16,324 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 19:29:16,325 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 19:29:16,325 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 19:29:16,325 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 19:29:16,326 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 19:29:16,326 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 19:29:16,326 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 19:29:16,326 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 19:29:16,326 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 19:29:16,326 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 19:29:16,327 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 19:29:16,327 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 19:29:16,328 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 19:29:16,328 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 19:29:16,328 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 19:29:16,328 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 19:29:16,328 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 19:29:16,328 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 19:29:16,328 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 19:29:16,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 19:29:16,329 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 19:29:16,329 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 19:29:16,329 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 19:29:16,330 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 19:29:16,330 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 19:29:16,330 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 19:29:16,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 19:29:16,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 19:29:16,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 19:29:16,546 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 19:29:16,546 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 19:29:16,547 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum3.c [2023-12-18 19:29:17,628 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 19:29:17,782 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 19:29:17,782 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum3.c [2023-12-18 19:29:17,788 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ad451692/67bdfc7c4a2a42178101bb7b35f8ae5a/FLAG4fbf9aebc [2023-12-18 19:29:17,799 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ad451692/67bdfc7c4a2a42178101bb7b35f8ae5a [2023-12-18 19:29:17,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 19:29:17,802 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 19:29:17,804 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 19:29:17,804 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 19:29:17,808 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 19:29:17,809 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:29:17" (1/1) ... [2023-12-18 19:29:17,809 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e4435e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:29:17, skipping insertion in model container [2023-12-18 19:29:17,809 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:29:17" (1/1) ... [2023-12-18 19:29:17,831 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 19:29:17,917 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_sum3.c[400,413] [2023-12-18 19:29:17,930 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 19:29:17,936 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 19:29:17,946 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_sum3.c[400,413] [2023-12-18 19:29:17,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 19:29:17,961 INFO L206 MainTranslator]: Completed translation [2023-12-18 19:29:17,962 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:29:17 WrapperNode [2023-12-18 19:29:17,962 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 19:29:17,963 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 19:29:17,963 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 19:29:17,963 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 19:29:17,968 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:29:17" (1/1) ... [2023-12-18 19:29:17,972 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:29:17" (1/1) ... [2023-12-18 19:29:17,986 INFO L138 Inliner]: procedures = 15, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2023-12-18 19:29:17,986 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 19:29:17,986 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 19:29:17,987 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 19:29:17,987 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 19:29:17,995 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:29:17" (1/1) ... [2023-12-18 19:29:17,996 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:29:17" (1/1) ... [2023-12-18 19:29:18,006 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:29:17" (1/1) ... [2023-12-18 19:29:18,026 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 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 19:29:18,026 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:29:17" (1/1) ... [2023-12-18 19:29:18,027 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:29:17" (1/1) ... [2023-12-18 19:29:18,030 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:29:17" (1/1) ... [2023-12-18 19:29:18,033 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:29:17" (1/1) ... [2023-12-18 19:29:18,033 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:29:17" (1/1) ... [2023-12-18 19:29:18,034 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:29:17" (1/1) ... [2023-12-18 19:29:18,035 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 19:29:18,036 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 19:29:18,036 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 19:29:18,036 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 19:29:18,037 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:29:17" (1/1) ... [2023-12-18 19:29:18,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 19:29:18,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:29:18,074 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 19:29:18,092 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 19:29:18,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 19:29:18,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 19:29:18,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 19:29:18,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 19:29:18,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 19:29:18,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 19:29:18,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 19:29:18,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 19:29:18,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 19:29:18,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 19:29:18,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 19:29:18,177 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 19:29:18,178 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 19:29:18,299 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 19:29:18,325 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 19:29:18,326 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-12-18 19:29:18,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:29:18 BoogieIcfgContainer [2023-12-18 19:29:18,326 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 19:29:18,327 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 19:29:18,327 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 19:29:18,329 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 19:29:18,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:29:17" (1/3) ... [2023-12-18 19:29:18,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bd427da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:29:18, skipping insertion in model container [2023-12-18 19:29:18,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:29:17" (2/3) ... [2023-12-18 19:29:18,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bd427da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:29:18, skipping insertion in model container [2023-12-18 19:29:18,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:29:18" (3/3) ... [2023-12-18 19:29:18,331 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum3.c [2023-12-18 19:29:18,343 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 19:29:18,343 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 19:29:18,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 19:29:18,375 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;@7e839d6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 19:29:18,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 19:29:18,378 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-18 19:29:18,383 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:29:18,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:29:18,385 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:29:18,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:29:18,390 INFO L85 PathProgramCache]: Analyzing trace with hash -978184044, now seen corresponding path program 1 times [2023-12-18 19:29:18,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:29:18,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750516758] [2023-12-18 19:29:18,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:18,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:29:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:18,552 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 19:29:18,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:29:18,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750516758] [2023-12-18 19:29:18,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750516758] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:29:18,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 19:29:18,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 19:29:18,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992006588] [2023-12-18 19:29:18,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:29:18,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 19:29:18,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:29:18,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 19:29:18,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 19:29:18,579 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:29:18,614 INFO L93 Difference]: Finished difference Result 41 states and 68 transitions. [2023-12-18 19:29:18,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 19:29:18,616 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2023-12-18 19:29:18,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:29:18,620 INFO L225 Difference]: With dead ends: 41 [2023-12-18 19:29:18,621 INFO L226 Difference]: Without dead ends: 19 [2023-12-18 19:29:18,623 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 19:29:18,627 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:29:18,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:29:18,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-18 19:29:18,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-12-18 19:29:18,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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 19:29:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-12-18 19:29:18,652 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 18 [2023-12-18 19:29:18,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:29:18,652 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-12-18 19:29:18,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:18,653 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-12-18 19:29:18,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-18 19:29:18,653 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:29:18,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:29:18,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 19:29:18,654 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:29:18,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:29:18,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2084842272, now seen corresponding path program 1 times [2023-12-18 19:29:18,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:29:18,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458781060] [2023-12-18 19:29:18,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:18,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:29:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:18,774 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 19:29:18,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:29:18,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458781060] [2023-12-18 19:29:18,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458781060] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:29:18,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 19:29:18,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-18 19:29:18,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061069902] [2023-12-18 19:29:18,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:29:18,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 19:29:18,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:29:18,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 19:29:18,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 19:29:18,782 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:18,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:29:18,815 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2023-12-18 19:29:18,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 19:29:18,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2023-12-18 19:29:18,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:29:18,817 INFO L225 Difference]: With dead ends: 36 [2023-12-18 19:29:18,817 INFO L226 Difference]: Without dead ends: 20 [2023-12-18 19:29:18,817 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 19:29:18,818 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:29:18,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:29:18,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-18 19:29:18,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-18 19:29:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:18,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-12-18 19:29:18,825 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 18 [2023-12-18 19:29:18,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:29:18,826 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-12-18 19:29:18,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:18,827 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2023-12-18 19:29:18,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-18 19:29:18,827 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:29:18,827 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 19:29:18,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 19:29:18,828 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:29:18,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:29:18,829 INFO L85 PathProgramCache]: Analyzing trace with hash 429836754, now seen corresponding path program 1 times [2023-12-18 19:29:18,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:29:18,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722125192] [2023-12-18 19:29:18,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:18,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:29:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:18,927 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 19:29:18,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:29:18,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722125192] [2023-12-18 19:29:18,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722125192] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:29:18,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 19:29:18,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 19:29:18,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215790334] [2023-12-18 19:29:18,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:29:18,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 19:29:18,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:29:18,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 19:29:18,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 19:29:18,933 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:18,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:29:18,988 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2023-12-18 19:29:18,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 19:29:18,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-18 19:29:18,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:29:18,990 INFO L225 Difference]: With dead ends: 40 [2023-12-18 19:29:18,990 INFO L226 Difference]: Without dead ends: 26 [2023-12-18 19:29:18,992 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 19:29:18,995 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:29:18,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 13 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:29:18,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-18 19:29:19,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-18 19:29:19,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:19,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-12-18 19:29:19,005 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 19 [2023-12-18 19:29:19,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:29:19,005 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-12-18 19:29:19,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:19,005 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-12-18 19:29:19,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-18 19:29:19,006 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:29:19,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:29:19,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-18 19:29:19,006 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:29:19,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:29:19,008 INFO L85 PathProgramCache]: Analyzing trace with hash 185456906, now seen corresponding path program 1 times [2023-12-18 19:29:19,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:29:19,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712635115] [2023-12-18 19:29:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:19,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:29:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:19,102 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 19:29:19,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:29:19,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712635115] [2023-12-18 19:29:19,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712635115] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:29:19,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032149381] [2023-12-18 19:29:19,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:19,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:29:19,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:29:19,105 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 19:29:19,134 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 19:29:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:19,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 19:29:19,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:29:19,231 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 19:29:19,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:29:19,273 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 19:29:19,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032149381] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:29:19,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:29:19,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-18 19:29:19,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173614201] [2023-12-18 19:29:19,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:29:19,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 19:29:19,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:29:19,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 19:29:19,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-18 19:29:19,276 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:19,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:29:19,305 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2023-12-18 19:29:19,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 19:29:19,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-18 19:29:19,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:29:19,306 INFO L225 Difference]: With dead ends: 49 [2023-12-18 19:29:19,306 INFO L226 Difference]: Without dead ends: 27 [2023-12-18 19:29:19,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 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 19:29:19,311 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:29:19,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:29:19,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-18 19:29:19,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-18 19:29:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 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 19:29:19,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-12-18 19:29:19,320 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 25 [2023-12-18 19:29:19,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:29:19,321 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-12-18 19:29:19,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:19,322 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-12-18 19:29:19,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 19:29:19,323 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:29:19,323 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:29:19,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-18 19:29:19,527 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 19:29:19,528 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:29:19,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:29:19,528 INFO L85 PathProgramCache]: Analyzing trace with hash -927551976, now seen corresponding path program 2 times [2023-12-18 19:29:19,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:29:19,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978737139] [2023-12-18 19:29:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:19,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:29:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:19,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 19:29:19,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:29:19,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978737139] [2023-12-18 19:29:19,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978737139] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:29:19,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528915999] [2023-12-18 19:29:19,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:29:19,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:29:19,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:29:19,610 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 19:29:19,633 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 19:29:19,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:29:19,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:29:19,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 19:29:19,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:29:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 19:29:19,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:29:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 19:29:19,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528915999] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:29:19,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:29:19,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-12-18 19:29:19,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556686302] [2023-12-18 19:29:19,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:29:19,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-18 19:29:19,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:29:19,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-18 19:29:19,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-18 19:29:19,732 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 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 19:29:19,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:29:19,782 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2023-12-18 19:29:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 19:29:19,783 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-18 19:29:19,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:29:19,783 INFO L225 Difference]: With dead ends: 52 [2023-12-18 19:29:19,783 INFO L226 Difference]: Without dead ends: 33 [2023-12-18 19:29:19,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 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 19:29:19,784 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:29:19,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 19 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:29:19,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-18 19:29:19,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-12-18 19:29:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 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 19:29:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-12-18 19:29:19,788 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 26 [2023-12-18 19:29:19,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:29:19,788 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-12-18 19:29:19,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 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 19:29:19,788 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-12-18 19:29:19,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-18 19:29:19,788 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:29:19,788 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:29:19,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-18 19:29:19,994 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 19:29:19,994 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:29:19,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:29:19,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1100979040, now seen corresponding path program 3 times [2023-12-18 19:29:19,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:29:19,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072940484] [2023-12-18 19:29:19,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:19,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:29:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:29:21,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:29:21,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072940484] [2023-12-18 19:29:21,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072940484] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:29:21,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677502300] [2023-12-18 19:29:21,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:29:21,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:29:21,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:29:21,301 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 19:29:21,325 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 19:29:21,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-18 19:29:21,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:29:21,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-18 19:29:21,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:29:21,414 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 19:29:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:29:21,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:29:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 19:29:21,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677502300] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:29:21,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:29:21,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 18 [2023-12-18 19:29:21,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281292345] [2023-12-18 19:29:21,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:29:21,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-18 19:29:21,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:29:21,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-18 19:29:21,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-12-18 19:29:21,664 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:21,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:29:21,867 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2023-12-18 19:29:21,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-18 19:29:21,868 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-12-18 19:29:21,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:29:21,870 INFO L225 Difference]: With dead ends: 58 [2023-12-18 19:29:21,870 INFO L226 Difference]: Without dead ends: 54 [2023-12-18 19:29:21,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-12-18 19:29:21,871 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:29:21,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 115 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:29:21,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-18 19:29:21,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2023-12-18 19:29:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 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 19:29:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2023-12-18 19:29:21,883 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 32 [2023-12-18 19:29:21,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:29:21,883 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2023-12-18 19:29:21,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:21,883 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2023-12-18 19:29:21,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-18 19:29:21,885 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:29:21,885 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:29:21,891 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 19:29:22,091 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 19:29:22,093 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:29:22,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:29:22,094 INFO L85 PathProgramCache]: Analyzing trace with hash -891767627, now seen corresponding path program 4 times [2023-12-18 19:29:22,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:29:22,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156968292] [2023-12-18 19:29:22,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:22,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:29:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 19:29:22,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:29:22,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156968292] [2023-12-18 19:29:22,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156968292] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:29:22,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416609833] [2023-12-18 19:29:22,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:29:22,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:29:22,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:29:22,164 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 19:29:22,166 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 19:29:22,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:29:22,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:29:22,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 19:29:22,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:29:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 19:29:22,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:29:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 19:29:22,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416609833] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:29:22,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:29:22,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-12-18 19:29:22,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214721232] [2023-12-18 19:29:22,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:29:22,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-18 19:29:22,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:29:22,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-18 19:29:22,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-12-18 19:29:22,317 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:22,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:29:22,470 INFO L93 Difference]: Finished difference Result 117 states and 142 transitions. [2023-12-18 19:29:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 19:29:22,470 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-12-18 19:29:22,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:29:22,471 INFO L225 Difference]: With dead ends: 117 [2023-12-18 19:29:22,471 INFO L226 Difference]: Without dead ends: 67 [2023-12-18 19:29:22,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-12-18 19:29:22,472 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 85 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:29:22,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 42 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:29:22,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-18 19:29:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2023-12-18 19:29:22,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:22,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2023-12-18 19:29:22,478 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 33 [2023-12-18 19:29:22,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:29:22,478 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2023-12-18 19:29:22,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:22,478 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2023-12-18 19:29:22,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-18 19:29:22,479 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:29:22,479 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:29:22,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 19:29:22,686 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 19:29:22,686 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:29:22,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:29:22,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1276218571, now seen corresponding path program 5 times [2023-12-18 19:29:22,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:29:22,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978888503] [2023-12-18 19:29:22,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:22,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:29:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 19:29:22,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:29:22,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978888503] [2023-12-18 19:29:22,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978888503] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:29:22,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348436886] [2023-12-18 19:29:22,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:29:22,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:29:22,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:29:22,764 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 19:29:22,789 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 19:29:22,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-18 19:29:22,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:29:22,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 19:29:22,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:29:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 19:29:22,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:29:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 19:29:22,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348436886] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:29:22,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:29:22,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-18 19:29:22,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028020671] [2023-12-18 19:29:22,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:29:22,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-18 19:29:22,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:29:22,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-18 19:29:22,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-12-18 19:29:22,913 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:22,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:29:22,984 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2023-12-18 19:29:22,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 19:29:22,984 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-18 19:29:22,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:29:22,984 INFO L225 Difference]: With dead ends: 60 [2023-12-18 19:29:22,985 INFO L226 Difference]: Without dead ends: 40 [2023-12-18 19:29:22,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-12-18 19:29:22,985 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:29:22,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 32 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:29:22,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-18 19:29:22,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-12-18 19:29:22,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2023-12-18 19:29:22,989 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 34 [2023-12-18 19:29:22,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:29:22,989 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2023-12-18 19:29:22,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:22,989 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2023-12-18 19:29:22,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-18 19:29:22,989 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:29:22,989 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:29:22,997 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 19:29:23,197 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 19:29:23,197 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:29:23,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:29:23,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1120646518, now seen corresponding path program 6 times [2023-12-18 19:29:23,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:29:23,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975488922] [2023-12-18 19:29:23,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:23,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:29:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:29:25,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:29:25,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975488922] [2023-12-18 19:29:25,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975488922] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:29:25,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582766291] [2023-12-18 19:29:25,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:29:25,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:29:25,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:29:25,052 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 19:29:25,054 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 19:29:25,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-12-18 19:29:25,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:29:25,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 82 conjunts are in the unsatisfiable core [2023-12-18 19:29:25,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:29:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 19:29:25,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:29:25,564 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:29:25,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-12-18 19:29:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 19:29:25,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582766291] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:29:25,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:29:25,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 12, 12] total 41 [2023-12-18 19:29:25,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717646857] [2023-12-18 19:29:25,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:29:25,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-18 19:29:25,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:29:25,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-18 19:29:25,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 19:29:25,709 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:27,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:29:27,073 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2023-12-18 19:29:27,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-18 19:29:27,073 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-12-18 19:29:27,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:29:27,075 INFO L225 Difference]: With dead ends: 117 [2023-12-18 19:29:27,075 INFO L226 Difference]: Without dead ends: 113 [2023-12-18 19:29:27,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=401, Invalid=3889, Unknown=0, NotChecked=0, Total=4290 [2023-12-18 19:29:27,077 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-18 19:29:27,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 154 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-18 19:29:27,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-12-18 19:29:27,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 81. [2023-12-18 19:29:27,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.225) internal successors, (98), 80 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:27,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2023-12-18 19:29:27,087 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 39 [2023-12-18 19:29:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:29:27,087 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2023-12-18 19:29:27,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:27,088 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2023-12-18 19:29:27,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 19:29:27,088 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:29:27,088 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:29:27,097 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 19:29:27,293 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 19:29:27,293 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:29:27,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:29:27,294 INFO L85 PathProgramCache]: Analyzing trace with hash 536518859, now seen corresponding path program 7 times [2023-12-18 19:29:27,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:29:27,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334294512] [2023-12-18 19:29:27,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:27,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:29:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-18 19:29:27,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:29:27,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334294512] [2023-12-18 19:29:27,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334294512] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:29:27,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831071885] [2023-12-18 19:29:27,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:29:27,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:29:27,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:29:27,389 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 19:29:27,413 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 19:29:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:27,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 19:29:27,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:29:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-18 19:29:27,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:29:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-18 19:29:27,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831071885] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:29:27,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:29:27,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-18 19:29:27,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822498510] [2023-12-18 19:29:27,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:29:27,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 19:29:27,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:29:27,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 19:29:27,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-12-18 19:29:27,541 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 19:29:27,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:29:27,673 INFO L93 Difference]: Finished difference Result 153 states and 182 transitions. [2023-12-18 19:29:27,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 19:29:27,673 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-18 19:29:27,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:29:27,673 INFO L225 Difference]: With dead ends: 153 [2023-12-18 19:29:27,673 INFO L226 Difference]: Without dead ends: 75 [2023-12-18 19:29:27,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-12-18 19:29:27,674 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:29:27,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 65 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:29:27,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-18 19:29:27,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-12-18 19:29:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 74 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 19:29:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2023-12-18 19:29:27,682 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 40 [2023-12-18 19:29:27,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:29:27,682 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2023-12-18 19:29:27,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 19:29:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2023-12-18 19:29:27,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-18 19:29:27,683 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:29:27,683 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:29:27,690 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 19:29:27,888 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 19:29:27,888 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:29:27,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:29:27,889 INFO L85 PathProgramCache]: Analyzing trace with hash 283594237, now seen corresponding path program 8 times [2023-12-18 19:29:27,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:29:27,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190092333] [2023-12-18 19:29:27,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:27,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:29:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-18 19:29:27,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:29:27,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190092333] [2023-12-18 19:29:27,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190092333] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:29:27,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130782187] [2023-12-18 19:29:27,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:29:27,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:29:27,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:29:27,984 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 19:29:28,000 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 19:29:28,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:29:28,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:29:28,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 19:29:28,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:29:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-18 19:29:28,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:29:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-18 19:29:28,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130782187] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:29:28,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:29:28,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-18 19:29:28,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3988142] [2023-12-18 19:29:28,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:29:28,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 19:29:28,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:29:28,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 19:29:28,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-18 19:29:28,217 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 19:29:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:29:28,303 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2023-12-18 19:29:28,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 19:29:28,303 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 41 [2023-12-18 19:29:28,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:29:28,304 INFO L225 Difference]: With dead ends: 105 [2023-12-18 19:29:28,304 INFO L226 Difference]: Without dead ends: 53 [2023-12-18 19:29:28,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-12-18 19:29:28,306 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:29:28,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 56 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:29:28,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-18 19:29:28,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2023-12-18 19:29:28,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:29:28,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2023-12-18 19:29:28,312 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 41 [2023-12-18 19:29:28,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:29:28,312 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2023-12-18 19:29:28,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 19:29:28,312 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2023-12-18 19:29:28,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-18 19:29:28,313 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:29:28,313 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:29:28,318 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 19:29:28,518 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 19:29:28,518 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:29:28,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:29:28,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1329532448, now seen corresponding path program 9 times [2023-12-18 19:29:28,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:29:28,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836920929] [2023-12-18 19:29:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:28,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:29:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:29:30,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:29:30,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836920929] [2023-12-18 19:29:30,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836920929] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:29:30,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457998463] [2023-12-18 19:29:30,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:29:30,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:29:30,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:29:30,734 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 19:29:30,748 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 19:29:30,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 19:29:30,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:29:30,801 WARN L260 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 116 conjunts are in the unsatisfiable core [2023-12-18 19:29:30,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:29:31,861 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:29:31,862 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 19:29:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 19:29:31,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:29:47,645 INFO L349 Elim1Store]: treesize reduction 84, result has 56.9 percent of original size [2023-12-18 19:29:47,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 71 treesize of output 123 [2023-12-18 19:29:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 19:29:47,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457998463] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:29:47,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:29:47,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 25, 30] total 84 [2023-12-18 19:29:47,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836539745] [2023-12-18 19:29:47,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:29:47,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-12-18 19:29:47,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:29:47,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-12-18 19:29:47,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=6442, Unknown=5, NotChecked=0, Total=6972 [2023-12-18 19:29:47,993 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 84 states, 84 states have (on average 1.5119047619047619) internal successors, (127), 84 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 19:30:00,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:30:00,249 INFO L93 Difference]: Finished difference Result 182 states and 212 transitions. [2023-12-18 19:30:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-12-18 19:30:00,250 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.5119047619047619) internal successors, (127), 84 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) Word has length 46 [2023-12-18 19:30:00,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:30:00,251 INFO L225 Difference]: With dead ends: 182 [2023-12-18 19:30:00,251 INFO L226 Difference]: Without dead ends: 172 [2023-12-18 19:30:00,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5039 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=1908, Invalid=18967, Unknown=5, NotChecked=0, Total=20880 [2023-12-18 19:30:00,256 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 134 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 4164 mSolverCounterSat, 484 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 4654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 4164 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:30:00,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 509 Invalid, 4654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 4164 Invalid, 6 Unknown, 0 Unchecked, 7.2s Time] [2023-12-18 19:30:00,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-12-18 19:30:00,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 87. [2023-12-18 19:30:00,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1744186046511629) internal successors, (101), 86 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:30:00,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2023-12-18 19:30:00,276 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 46 [2023-12-18 19:30:00,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:30:00,276 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2023-12-18 19:30:00,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.5119047619047619) internal successors, (127), 84 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 19:30:00,277 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2023-12-18 19:30:00,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-18 19:30:00,277 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:30:00,277 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:30:00,284 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 19:30:00,484 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 19:30:00,484 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:30:00,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:30:00,485 INFO L85 PathProgramCache]: Analyzing trace with hash -165085131, now seen corresponding path program 10 times [2023-12-18 19:30:00,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:30:00,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903298599] [2023-12-18 19:30:00,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:30:00,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:30:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-18 19:30:00,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:30:00,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903298599] [2023-12-18 19:30:00,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903298599] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:30:00,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105920486] [2023-12-18 19:30:00,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:30:00,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:30:00,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:30:00,600 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 19:30:00,602 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 19:30:00,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:30:00,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:30:00,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 19:30:00,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:30:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-18 19:30:00,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:30:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-18 19:30:00,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105920486] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:30:00,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:30:00,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-12-18 19:30:00,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908868589] [2023-12-18 19:30:00,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:30:00,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-18 19:30:00,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:30:00,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-18 19:30:00,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-12-18 19:30:00,877 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 19:30:01,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:30:01,192 INFO L93 Difference]: Finished difference Result 231 states and 271 transitions. [2023-12-18 19:30:01,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 19:30:01,193 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-12-18 19:30:01,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:30:01,193 INFO L225 Difference]: With dead ends: 231 [2023-12-18 19:30:01,193 INFO L226 Difference]: Without dead ends: 110 [2023-12-18 19:30:01,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2023-12-18 19:30:01,194 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:30:01,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 55 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:30:01,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-12-18 19:30:01,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 95. [2023-12-18 19:30:01,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.148936170212766) internal successors, (108), 94 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:30:01,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2023-12-18 19:30:01,213 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 47 [2023-12-18 19:30:01,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:30:01,213 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2023-12-18 19:30:01,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 19:30:01,213 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2023-12-18 19:30:01,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-18 19:30:01,214 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:30:01,214 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:30:01,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-18 19:30:01,418 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 19:30:01,419 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:30:01,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:30:01,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1665220181, now seen corresponding path program 11 times [2023-12-18 19:30:01,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:30:01,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296309050] [2023-12-18 19:30:01,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:30:01,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:30:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-18 19:30:01,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:30:01,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296309050] [2023-12-18 19:30:01,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296309050] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:30:01,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269658336] [2023-12-18 19:30:01,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:30:01,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:30:01,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:30:01,563 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 19:30:01,565 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 19:30:01,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-18 19:30:01,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:30:01,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 19:30:01,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:30:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-18 19:30:01,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:30:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-18 19:30:01,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269658336] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:30:01,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:30:01,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-12-18 19:30:01,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658579723] [2023-12-18 19:30:01,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:30:01,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-18 19:30:01,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:30:01,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-18 19:30:01,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-12-18 19:30:01,919 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 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 19:30:02,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:30:02,131 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2023-12-18 19:30:02,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 19:30:02,131 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 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 50 [2023-12-18 19:30:02,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:30:02,132 INFO L225 Difference]: With dead ends: 104 [2023-12-18 19:30:02,132 INFO L226 Difference]: Without dead ends: 82 [2023-12-18 19:30:02,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2023-12-18 19:30:02,132 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:30:02,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 37 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:30:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-18 19:30:02,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2023-12-18 19:30:02,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:30:02,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-12-18 19:30:02,149 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 50 [2023-12-18 19:30:02,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:30:02,149 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-12-18 19:30:02,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 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 19:30:02,149 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-12-18 19:30:02,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-18 19:30:02,150 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:30:02,150 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:30:02,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-18 19:30:02,350 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 19:30:02,350 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:30:02,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:30:02,351 INFO L85 PathProgramCache]: Analyzing trace with hash 179850250, now seen corresponding path program 12 times [2023-12-18 19:30:02,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:30:02,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326900723] [2023-12-18 19:30:02,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:30:02,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:30:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:05,417 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 19:30:05,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:30:05,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326900723] [2023-12-18 19:30:05,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326900723] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:30:05,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892656670] [2023-12-18 19:30:05,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:30:05,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:30:05,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:30:05,419 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 19:30:05,420 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 19:30:05,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-18 19:30:05,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:30:05,511 WARN L260 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 149 conjunts are in the unsatisfiable core [2023-12-18 19:30:05,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:30:07,256 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:30:07,257 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 15 treesize of output 14 [2023-12-18 19:30:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:30:07,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:30:09,563 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:30:09,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 75 treesize of output 199 [2023-12-18 19:30:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:30:11,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892656670] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:30:11,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:30:11,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 29, 44] total 105 [2023-12-18 19:30:11,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826074542] [2023-12-18 19:30:11,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:30:11,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-12-18 19:30:11,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:30:11,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-12-18 19:30:11,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=10319, Unknown=1, NotChecked=0, Total=10920 [2023-12-18 19:30:11,782 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 105 states, 105 states have (on average 1.4190476190476191) internal successors, (149), 105 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:30:22,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:30:22,578 INFO L93 Difference]: Finished difference Result 243 states and 278 transitions. [2023-12-18 19:30:22,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-12-18 19:30:22,578 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.4190476190476191) internal successors, (149), 105 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-12-18 19:30:22,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:30:22,579 INFO L225 Difference]: With dead ends: 243 [2023-12-18 19:30:22,579 INFO L226 Difference]: Without dead ends: 138 [2023-12-18 19:30:22,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7231 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=2018, Invalid=24713, Unknown=1, NotChecked=0, Total=26732 [2023-12-18 19:30:22,582 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 242 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 6645 mSolverCounterSat, 745 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 7392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 745 IncrementalHoareTripleChecker+Valid, 6645 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-12-18 19:30:22,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 508 Invalid, 7392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [745 Valid, 6645 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2023-12-18 19:30:22,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-12-18 19:30:22,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 79. [2023-12-18 19:30:22,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.141025641025641) internal successors, (89), 78 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 19:30:22,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2023-12-18 19:30:22,613 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 53 [2023-12-18 19:30:22,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:30:22,613 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2023-12-18 19:30:22,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.4190476190476191) internal successors, (149), 105 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:30:22,613 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2023-12-18 19:30:22,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-18 19:30:22,613 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:30:22,613 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:30:22,621 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 19:30:22,814 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 19:30:22,814 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:30:22,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:30:22,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1831185661, now seen corresponding path program 13 times [2023-12-18 19:30:22,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:30:22,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588892059] [2023-12-18 19:30:22,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:30:22,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:30:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-18 19:30:22,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:30:22,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588892059] [2023-12-18 19:30:22,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588892059] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:30:22,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828568207] [2023-12-18 19:30:22,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:30:22,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:30:22,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:30:22,964 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 19:30:22,966 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 19:30:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:23,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 19:30:23,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:30:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-18 19:30:23,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:30:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-18 19:30:23,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828568207] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:30:23,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:30:23,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-18 19:30:23,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728211467] [2023-12-18 19:30:23,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:30:23,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-18 19:30:23,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:30:23,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-18 19:30:23,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2023-12-18 19:30:23,217 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:30:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:30:23,352 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2023-12-18 19:30:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-18 19:30:23,352 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-18 19:30:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:30:23,352 INFO L225 Difference]: With dead ends: 124 [2023-12-18 19:30:23,352 INFO L226 Difference]: Without dead ends: 61 [2023-12-18 19:30:23,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2023-12-18 19:30:23,353 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:30:23,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 51 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:30:23,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-18 19:30:23,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-12-18 19:30:23,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:30:23,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2023-12-18 19:30:23,375 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 55 [2023-12-18 19:30:23,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:30:23,375 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2023-12-18 19:30:23,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:30:23,376 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2023-12-18 19:30:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-18 19:30:23,376 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:30:23,376 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:30:23,381 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 19:30:23,581 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 19:30:23,581 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:30:23,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:30:23,582 INFO L85 PathProgramCache]: Analyzing trace with hash 997205920, now seen corresponding path program 14 times [2023-12-18 19:30:23,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:30:23,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510280262] [2023-12-18 19:30:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:30:23,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:30:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 6 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:30:27,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:30:27,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510280262] [2023-12-18 19:30:27,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510280262] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:30:27,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613800975] [2023-12-18 19:30:27,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:30:27,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:30:27,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:30:27,947 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 19:30:27,949 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 19:30:28,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:30:28,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:30:28,047 WARN L260 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 168 conjunts are in the unsatisfiable core [2023-12-18 19:30:28,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:30:28,104 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 19:30:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:30:28,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:30:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-18 19:30:29,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613800975] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:30:29,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:30:29,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 24, 17] total 72 [2023-12-18 19:30:29,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724681120] [2023-12-18 19:30:29,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:30:29,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-12-18 19:30:29,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:30:29,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-12-18 19:30:29,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=4844, Unknown=0, NotChecked=0, Total=5112 [2023-12-18 19:30:29,397 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 72 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:30:31,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:30:31,934 INFO L93 Difference]: Finished difference Result 160 states and 179 transitions. [2023-12-18 19:30:31,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-18 19:30:31,934 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 states have internal predecessors, (152), 0 states have call successors, (0), 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 19:30:31,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:30:31,935 INFO L225 Difference]: With dead ends: 160 [2023-12-18 19:30:31,935 INFO L226 Difference]: Without dead ends: 156 [2023-12-18 19:30:31,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2331 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=642, Invalid=8864, Unknown=0, NotChecked=0, Total=9506 [2023-12-18 19:30:31,936 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 2583 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 2853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 2583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:30:31,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 326 Invalid, 2853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 2583 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-18 19:30:31,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-12-18 19:30:31,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 88. [2023-12-18 19:30:31,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 87 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:30:31,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2023-12-18 19:30:31,971 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 60 [2023-12-18 19:30:31,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:30:31,971 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2023-12-18 19:30:31,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:30:31,971 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2023-12-18 19:30:31,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-18 19:30:31,972 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:30:31,972 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:30:31,977 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 19:30:32,172 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 19:30:32,172 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:30:32,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:30:32,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1285364661, now seen corresponding path program 15 times [2023-12-18 19:30:32,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:30:32,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83670829] [2023-12-18 19:30:32,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:30:32,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:30:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-18 19:30:32,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:30:32,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83670829] [2023-12-18 19:30:32,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83670829] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:30:32,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855931478] [2023-12-18 19:30:32,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:30:32,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:30:32,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:30:32,340 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 19:30:32,341 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 19:30:32,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-18 19:30:32,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:30:32,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 19:30:32,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:30:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-18 19:30:32,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:30:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-18 19:30:32,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855931478] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:30:32,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:30:32,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-12-18 19:30:32,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217504571] [2023-12-18 19:30:32,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:30:32,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-18 19:30:32,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:30:32,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-18 19:30:32,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2023-12-18 19:30:32,641 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 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 19:30:32,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:30:32,857 INFO L93 Difference]: Finished difference Result 209 states and 234 transitions. [2023-12-18 19:30:32,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-18 19:30:32,858 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 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 61 [2023-12-18 19:30:32,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:30:32,858 INFO L225 Difference]: With dead ends: 209 [2023-12-18 19:30:32,858 INFO L226 Difference]: Without dead ends: 89 [2023-12-18 19:30:32,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 13 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2023-12-18 19:30:32,859 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:30:32,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:30:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-18 19:30:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-12-18 19:30:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.125) internal successors, (99), 88 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 19:30:32,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2023-12-18 19:30:32,894 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 61 [2023-12-18 19:30:32,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:30:32,894 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2023-12-18 19:30:32,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 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 19:30:32,894 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2023-12-18 19:30:32,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-18 19:30:32,894 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:30:32,894 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:30:32,899 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 19:30:33,096 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 19:30:33,096 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:30:33,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:30:33,096 INFO L85 PathProgramCache]: Analyzing trace with hash 208470467, now seen corresponding path program 16 times [2023-12-18 19:30:33,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:30:33,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766149386] [2023-12-18 19:30:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:30:33,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:30:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-18 19:30:33,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:30:33,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766149386] [2023-12-18 19:30:33,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766149386] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:30:33,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771713007] [2023-12-18 19:30:33,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:30:33,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:30:33,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:30:33,279 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 19:30:33,306 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 19:30:33,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:30:33,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:30:33,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 19:30:33,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:30:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-18 19:30:33,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:30:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-18 19:30:33,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771713007] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:30:33,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:30:33,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2023-12-18 19:30:33,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527948922] [2023-12-18 19:30:33,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:30:33,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-18 19:30:33,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:30:33,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-18 19:30:33,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2023-12-18 19:30:33,755 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 39 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 39 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 19:30:34,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:30:34,045 INFO L93 Difference]: Finished difference Result 139 states and 159 transitions. [2023-12-18 19:30:34,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-18 19:30:34,045 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 39 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 62 [2023-12-18 19:30:34,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:30:34,046 INFO L225 Difference]: With dead ends: 139 [2023-12-18 19:30:34,046 INFO L226 Difference]: Without dead ends: 68 [2023-12-18 19:30:34,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 94 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=1845, Unknown=0, NotChecked=0, Total=2162 [2023-12-18 19:30:34,046 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:30:34,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 44 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:30:34,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-18 19:30:34,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-12-18 19:30:34,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 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 19:30:34,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2023-12-18 19:30:34,073 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 62 [2023-12-18 19:30:34,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:30:34,073 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2023-12-18 19:30:34,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 39 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 19:30:34,074 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2023-12-18 19:30:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-18 19:30:34,074 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:30:34,074 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:30:34,079 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 19:30:34,274 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 19:30:34,275 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:30:34,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:30:34,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1212800394, now seen corresponding path program 17 times [2023-12-18 19:30:34,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:30:34,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489023145] [2023-12-18 19:30:34,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:30:34,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:30:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:30:39,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:30:39,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489023145] [2023-12-18 19:30:39,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489023145] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:30:39,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834050010] [2023-12-18 19:30:39,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:30:39,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:30:39,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:30:39,176 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 19:30:39,176 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 19:30:39,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-18 19:30:39,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:30:39,381 WARN L260 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 194 conjunts are in the unsatisfiable core [2023-12-18 19:30:39,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:30:39,516 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 19:30:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:30:39,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:30:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-18 19:30:40,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834050010] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:30:40,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:30:40,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 27, 19] total 74 [2023-12-18 19:30:40,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462929987] [2023-12-18 19:30:40,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:30:40,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-12-18 19:30:40,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:30:40,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-12-18 19:30:40,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=5109, Unknown=0, NotChecked=0, Total=5402 [2023-12-18 19:30:40,836 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 74 states, 74 states have (on average 2.175675675675676) internal successors, (161), 74 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:30:44,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:30:44,308 INFO L93 Difference]: Finished difference Result 184 states and 203 transitions. [2023-12-18 19:30:44,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-12-18 19:30:44,308 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.175675675675676) internal successors, (161), 74 states have internal predecessors, (161), 0 states have call successors, (0), 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 67 [2023-12-18 19:30:44,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:30:44,309 INFO L225 Difference]: With dead ends: 184 [2023-12-18 19:30:44,309 INFO L226 Difference]: Without dead ends: 180 [2023-12-18 19:30:44,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3073 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1055, Invalid=11827, Unknown=0, NotChecked=0, Total=12882 [2023-12-18 19:30:44,310 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 2977 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 3379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 2977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-18 19:30:44,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 325 Invalid, 3379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 2977 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-18 19:30:44,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-12-18 19:30:44,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 98. [2023-12-18 19:30:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1134020618556701) internal successors, (108), 97 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:30:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2023-12-18 19:30:44,354 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 67 [2023-12-18 19:30:44,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:30:44,354 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2023-12-18 19:30:44,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.175675675675676) internal successors, (161), 74 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:30:44,354 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2023-12-18 19:30:44,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-18 19:30:44,355 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:30:44,355 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:30:44,365 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 19:30:44,558 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 19:30:44,558 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:30:44,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:30:44,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1443958219, now seen corresponding path program 18 times [2023-12-18 19:30:44,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:30:44,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636169196] [2023-12-18 19:30:44,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:30:44,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:30:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-12-18 19:30:44,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:30:44,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636169196] [2023-12-18 19:30:44,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636169196] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:30:44,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828134122] [2023-12-18 19:30:44,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:30:44,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:30:44,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:30:44,738 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 19:30:44,738 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 19:30:44,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-18 19:30:44,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:30:44,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-18 19:30:44,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:30:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-12-18 19:30:45,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:30:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-12-18 19:30:45,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828134122] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:30:45,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:30:45,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-12-18 19:30:45,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930178389] [2023-12-18 19:30:45,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:30:45,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-18 19:30:45,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:30:45,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-18 19:30:45,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2023-12-18 19:30:45,163 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 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 19:30:45,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:30:45,403 INFO L93 Difference]: Finished difference Result 233 states and 258 transitions. [2023-12-18 19:30:45,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 19:30:45,403 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 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 68 [2023-12-18 19:30:45,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:30:45,403 INFO L225 Difference]: With dead ends: 233 [2023-12-18 19:30:45,404 INFO L226 Difference]: Without dead ends: 99 [2023-12-18 19:30:45,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 111 SyntacticMatches, 15 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2023-12-18 19:30:45,405 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:30:45,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 38 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:30:45,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-18 19:30:45,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-12-18 19:30:45,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1122448979591837) internal successors, (109), 98 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 19:30:45,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2023-12-18 19:30:45,448 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 68 [2023-12-18 19:30:45,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:30:45,448 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2023-12-18 19:30:45,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 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 19:30:45,449 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2023-12-18 19:30:45,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-18 19:30:45,449 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:30:45,449 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:30:45,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-18 19:30:45,649 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 19:30:45,650 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:30:45,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:30:45,650 INFO L85 PathProgramCache]: Analyzing trace with hash -66921475, now seen corresponding path program 19 times [2023-12-18 19:30:45,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:30:45,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662912713] [2023-12-18 19:30:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:30:45,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:30:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-12-18 19:30:45,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:30:45,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662912713] [2023-12-18 19:30:45,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662912713] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:30:45,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717635535] [2023-12-18 19:30:45,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:30:45,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:30:45,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:30:45,867 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 19:30:45,900 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 19:30:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:45,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-18 19:30:45,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:30:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-12-18 19:30:46,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:30:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-12-18 19:30:46,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717635535] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:30:46,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:30:46,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-12-18 19:30:46,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764996052] [2023-12-18 19:30:46,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:30:46,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-18 19:30:46,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:30:46,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-18 19:30:46,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2023-12-18 19:30:46,224 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 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 19:30:46,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:30:46,384 INFO L93 Difference]: Finished difference Result 154 states and 174 transitions. [2023-12-18 19:30:46,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 19:30:46,386 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 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 69 [2023-12-18 19:30:46,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:30:46,386 INFO L225 Difference]: With dead ends: 154 [2023-12-18 19:30:46,386 INFO L226 Difference]: Without dead ends: 75 [2023-12-18 19:30:46,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2023-12-18 19:30:46,387 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:30:46,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 38 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:30:46,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-18 19:30:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-12-18 19:30:46,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:30:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2023-12-18 19:30:46,426 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 69 [2023-12-18 19:30:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:30:46,426 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2023-12-18 19:30:46,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 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 19:30:46,426 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2023-12-18 19:30:46,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-18 19:30:46,426 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:30:46,426 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:30:46,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-18 19:30:46,627 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 19:30:46,628 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:30:46,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:30:46,628 INFO L85 PathProgramCache]: Analyzing trace with hash 310620448, now seen corresponding path program 20 times [2023-12-18 19:30:46,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:30:46,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688483753] [2023-12-18 19:30:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:30:46,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:30:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 10 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:30:52,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:30:52,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688483753] [2023-12-18 19:30:52,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688483753] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:30:52,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752100996] [2023-12-18 19:30:52,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:30:52,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:30:52,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:30:52,765 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 19:30:52,766 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 19:30:52,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:30:52,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:30:52,882 WARN L260 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 220 conjunts are in the unsatisfiable core [2023-12-18 19:30:52,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:30:53,024 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 19:30:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:30:53,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:30:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-18 19:30:54,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752100996] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:30:54,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:30:54,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 30, 21] total 84 [2023-12-18 19:30:54,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525210919] [2023-12-18 19:30:54,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:30:54,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-12-18 19:30:54,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:30:54,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-12-18 19:30:54,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=6629, Unknown=0, NotChecked=0, Total=6972 [2023-12-18 19:30:54,759 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 84 states, 84 states have (on average 2.1547619047619047) internal successors, (181), 84 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:30:59,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:30:59,319 INFO L93 Difference]: Finished difference Result 217 states and 237 transitions. [2023-12-18 19:30:59,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-12-18 19:30:59,320 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.1547619047619047) internal successors, (181), 84 states have internal predecessors, (181), 0 states have call successors, (0), 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 19:30:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:30:59,324 INFO L225 Difference]: With dead ends: 217 [2023-12-18 19:30:59,324 INFO L226 Difference]: Without dead ends: 213 [2023-12-18 19:30:59,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4125 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1301, Invalid=16255, Unknown=0, NotChecked=0, Total=17556 [2023-12-18 19:30:59,325 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 3652 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 4047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 3652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-18 19:30:59,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 258 Invalid, 4047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 3652 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-18 19:30:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-12-18 19:30:59,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 150. [2023-12-18 19:30:59,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.1140939597315436) internal successors, (166), 149 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 19:30:59,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 166 transitions. [2023-12-18 19:30:59,396 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 166 transitions. Word has length 74 [2023-12-18 19:30:59,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:30:59,396 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 166 transitions. [2023-12-18 19:30:59,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.1547619047619047) internal successors, (181), 84 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:30:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 166 transitions. [2023-12-18 19:30:59,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-18 19:30:59,397 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:30:59,397 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:30:59,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-18 19:30:59,602 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 19:30:59,602 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:30:59,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:30:59,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1328740555, now seen corresponding path program 21 times [2023-12-18 19:30:59,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:30:59,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038956223] [2023-12-18 19:30:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:30:59,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:30:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-12-18 19:30:59,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:30:59,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038956223] [2023-12-18 19:30:59,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038956223] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:30:59,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649645535] [2023-12-18 19:30:59,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:30:59,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:30:59,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:30:59,811 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 19:30:59,812 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 19:30:59,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-18 19:30:59,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:30:59,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-18 19:30:59,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:31:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-12-18 19:31:00,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:31:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-12-18 19:31:00,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649645535] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:31:00,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:31:00,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2023-12-18 19:31:00,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35528894] [2023-12-18 19:31:00,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:31:00,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-18 19:31:00,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:31:00,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-18 19:31:00,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=2029, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 19:31:00,558 INFO L87 Difference]: Start difference. First operand 150 states and 166 transitions. Second operand has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:31:01,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:31:01,565 INFO L93 Difference]: Finished difference Result 312 states and 348 transitions. [2023-12-18 19:31:01,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-18 19:31:01,566 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 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 19:31:01,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:31:01,566 INFO L225 Difference]: With dead ends: 312 [2023-12-18 19:31:01,566 INFO L226 Difference]: Without dead ends: 154 [2023-12-18 19:31:01,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 123 SyntacticMatches, 10 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=676, Invalid=4154, Unknown=0, NotChecked=0, Total=4830 [2023-12-18 19:31:01,567 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 2142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-18 19:31:01,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 85 Invalid, 2142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-18 19:31:01,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-12-18 19:31:01,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 113. [2023-12-18 19:31:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0982142857142858) internal successors, (123), 112 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:31:01,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2023-12-18 19:31:01,626 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 75 [2023-12-18 19:31:01,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:31:01,626 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2023-12-18 19:31:01,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:31:01,626 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2023-12-18 19:31:01,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-18 19:31:01,627 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:31:01,627 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:31:01,635 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 19:31:01,831 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 19:31:01,832 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:31:01,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:31:01,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1267698436, now seen corresponding path program 22 times [2023-12-18 19:31:01,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:31:01,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925654190] [2023-12-18 19:31:01,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:31:01,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:31:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:31:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-12-18 19:31:02,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:31:02,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925654190] [2023-12-18 19:31:02,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925654190] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:31:02,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405528642] [2023-12-18 19:31:02,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:31:02,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:31:02,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:31:02,048 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 19:31:02,050 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 19:31:02,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:31:02,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:31:02,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-18 19:31:02,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:31:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-12-18 19:31:02,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:31:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-12-18 19:31:02,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405528642] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:31:02,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:31:02,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2023-12-18 19:31:02,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019097099] [2023-12-18 19:31:02,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:31:02,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-18 19:31:02,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:31:02,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-18 19:31:02,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 19:31:02,748 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 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 19:31:03,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:31:03,144 INFO L93 Difference]: Finished difference Result 162 states and 176 transitions. [2023-12-18 19:31:03,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-18 19:31:03,145 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 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) Word has length 76 [2023-12-18 19:31:03,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:31:03,145 INFO L225 Difference]: With dead ends: 162 [2023-12-18 19:31:03,145 INFO L226 Difference]: Without dead ends: 82 [2023-12-18 19:31:03,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 114 SyntacticMatches, 10 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=486, Invalid=2936, Unknown=0, NotChecked=0, Total=3422 [2023-12-18 19:31:03,146 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 77 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:31:03,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 78 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:31:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-18 19:31:03,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-12-18 19:31:03,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 81 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 19:31:03,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2023-12-18 19:31:03,192 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 76 [2023-12-18 19:31:03,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:31:03,192 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2023-12-18 19:31:03,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 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 19:31:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2023-12-18 19:31:03,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-18 19:31:03,193 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:31:03,193 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:31:03,198 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 19:31:03,394 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 19:31:03,394 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:31:03,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:31:03,394 INFO L85 PathProgramCache]: Analyzing trace with hash -946274550, now seen corresponding path program 23 times [2023-12-18 19:31:03,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:31:03,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957056606] [2023-12-18 19:31:03,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:31:03,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:31:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:31:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 31 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:31:11,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:31:11,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957056606] [2023-12-18 19:31:11,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957056606] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:31:11,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704001242] [2023-12-18 19:31:11,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:31:11,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:31:11,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:31:11,074 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 19:31:11,074 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 19:31:11,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-18 19:31:11,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:31:11,317 WARN L260 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 246 conjunts are in the unsatisfiable core [2023-12-18 19:31:11,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:31:11,599 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 19:31:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:31:12,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:31:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-18 19:31:14,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704001242] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:31:14,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:31:14,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 33, 23] total 97 [2023-12-18 19:31:14,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667825606] [2023-12-18 19:31:14,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:31:14,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-12-18 19:31:14,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:31:14,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-12-18 19:31:14,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=8902, Unknown=0, NotChecked=0, Total=9312 [2023-12-18 19:31:14,117 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:31:20,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:31:20,396 INFO L93 Difference]: Finished difference Result 220 states and 239 transitions. [2023-12-18 19:31:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-12-18 19:31:20,397 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 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 81 [2023-12-18 19:31:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:31:20,397 INFO L225 Difference]: With dead ends: 220 [2023-12-18 19:31:20,397 INFO L226 Difference]: Without dead ends: 216 [2023-12-18 19:31:20,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5240 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1558, Invalid=19904, Unknown=0, NotChecked=0, Total=21462 [2023-12-18 19:31:20,399 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 70 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 4240 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 4754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 4240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-18 19:31:20,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 350 Invalid, 4754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 4240 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-18 19:31:20,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-12-18 19:31:20,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 118. [2023-12-18 19:31:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0940170940170941) internal successors, (128), 117 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:31:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2023-12-18 19:31:20,507 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 81 [2023-12-18 19:31:20,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:31:20,507 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2023-12-18 19:31:20,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:31:20,507 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2023-12-18 19:31:20,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-18 19:31:20,508 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:31:20,508 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:31:20,517 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 19:31:20,714 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 19:31:20,715 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:31:20,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:31:20,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1528640437, now seen corresponding path program 24 times [2023-12-18 19:31:20,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:31:20,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602184305] [2023-12-18 19:31:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:31:20,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:31:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:31:20,976 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-12-18 19:31:20,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:31:20,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602184305] [2023-12-18 19:31:20,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602184305] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:31:20,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324344750] [2023-12-18 19:31:20,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:31:20,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:31:20,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:31:20,978 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 19:31:20,979 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 19:31:21,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-18 19:31:21,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:31:21,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-18 19:31:21,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:31:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-12-18 19:31:21,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:31:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-12-18 19:31:21,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324344750] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:31:21,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:31:21,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-12-18 19:31:21,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521167492] [2023-12-18 19:31:21,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:31:21,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-18 19:31:21,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:31:21,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-18 19:31:21,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 19:31:21,564 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 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 19:31:21,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:31:21,940 INFO L93 Difference]: Finished difference Result 281 states and 306 transitions. [2023-12-18 19:31:21,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 19:31:21,941 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 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 82 [2023-12-18 19:31:21,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:31:21,941 INFO L225 Difference]: With dead ends: 281 [2023-12-18 19:31:21,941 INFO L226 Difference]: Without dead ends: 119 [2023-12-18 19:31:21,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 133 SyntacticMatches, 19 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2023-12-18 19:31:21,942 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:31:21,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 65 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:31:21,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-12-18 19:31:22,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-12-18 19:31:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0932203389830508) internal successors, (129), 118 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:31:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2023-12-18 19:31:22,019 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 82 [2023-12-18 19:31:22,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:31:22,019 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2023-12-18 19:31:22,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 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 19:31:22,019 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2023-12-18 19:31:22,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-18 19:31:22,019 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:31:22,019 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:31:22,027 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 19:31:22,221 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 19:31:22,221 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:31:22,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:31:22,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1385243907, now seen corresponding path program 25 times [2023-12-18 19:31:22,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:31:22,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315527804] [2023-12-18 19:31:22,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:31:22,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:31:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:31:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-18 19:31:22,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:31:22,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315527804] [2023-12-18 19:31:22,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315527804] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:31:22,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660385981] [2023-12-18 19:31:22,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:31:22,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:31:22,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:31:22,491 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 19:31:22,493 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 19:31:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:31:22,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-18 19:31:22,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:31:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-18 19:31:22,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:31:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-18 19:31:22,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660385981] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:31:22,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:31:22,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-12-18 19:31:22,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996325980] [2023-12-18 19:31:22,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:31:22,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-18 19:31:22,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:31:22,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-18 19:31:22,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 19:31:22,941 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 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 19:31:23,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:31:23,192 INFO L93 Difference]: Finished difference Result 184 states and 204 transitions. [2023-12-18 19:31:23,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 19:31:23,192 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 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 83 [2023-12-18 19:31:23,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:31:23,193 INFO L225 Difference]: With dead ends: 184 [2023-12-18 19:31:23,193 INFO L226 Difference]: Without dead ends: 89 [2023-12-18 19:31:23,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 134 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2023-12-18 19:31:23,194 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:31:23,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 54 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:31:23,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-18 19:31:23,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-12-18 19:31:23,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0795454545454546) internal successors, (95), 88 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:31:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2023-12-18 19:31:23,251 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 83 [2023-12-18 19:31:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:31:23,251 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2023-12-18 19:31:23,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 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 19:31:23,251 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2023-12-18 19:31:23,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-18 19:31:23,252 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:31:23,252 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:31:23,257 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 19:31:23,454 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 19:31:23,454 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:31:23,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:31:23,454 INFO L85 PathProgramCache]: Analyzing trace with hash -418796896, now seen corresponding path program 26 times [2023-12-18 19:31:23,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:31:23,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582876339] [2023-12-18 19:31:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:31:23,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:31:23,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:31:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 16 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:31:33,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:31:33,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582876339] [2023-12-18 19:31:33,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582876339] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:31:33,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826939601] [2023-12-18 19:31:33,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:31:33,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:31:33,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:31:33,545 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 19:31:33,546 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 19:31:33,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:31:33,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:31:33,671 WARN L260 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 272 conjunts are in the unsatisfiable core [2023-12-18 19:31:33,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:31:33,796 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 19:31:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:31:34,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:31:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-18 19:31:36,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826939601] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:31:36,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:31:36,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 36, 25] total 102 [2023-12-18 19:31:36,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918015227] [2023-12-18 19:31:36,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:31:36,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-12-18 19:31:36,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:31:36,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-12-18 19:31:36,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=9815, Unknown=0, NotChecked=0, Total=10302 [2023-12-18 19:31:36,601 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 102 states, 102 states have (on average 2.127450980392157) internal successors, (217), 102 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:31:42,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:31:42,459 INFO L93 Difference]: Finished difference Result 248 states and 271 transitions. [2023-12-18 19:31:42,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-12-18 19:31:42,460 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.127450980392157) internal successors, (217), 102 states have internal predecessors, (217), 0 states have call successors, (0), 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 88 [2023-12-18 19:31:42,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:31:42,461 INFO L225 Difference]: With dead ends: 248 [2023-12-18 19:31:42,461 INFO L226 Difference]: Without dead ends: 244 [2023-12-18 19:31:42,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5571 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1311, Invalid=20151, Unknown=0, NotChecked=0, Total=21462 [2023-12-18 19:31:42,462 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 59 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 5215 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 5557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 5215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-18 19:31:42,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 296 Invalid, 5557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 5215 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-18 19:31:42,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-12-18 19:31:42,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 153. [2023-12-18 19:31:42,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0921052631578947) internal successors, (166), 152 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 19:31:42,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 166 transitions. [2023-12-18 19:31:42,566 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 166 transitions. Word has length 88 [2023-12-18 19:31:42,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:31:42,566 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 166 transitions. [2023-12-18 19:31:42,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.127450980392157) internal successors, (217), 102 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:31:42,566 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 166 transitions. [2023-12-18 19:31:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-18 19:31:42,567 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:31:42,567 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:31:42,572 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 19:31:42,768 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 19:31:42,768 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:31:42,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:31:42,769 INFO L85 PathProgramCache]: Analyzing trace with hash 575718069, now seen corresponding path program 27 times [2023-12-18 19:31:42,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:31:42,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663357273] [2023-12-18 19:31:42,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:31:42,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:31:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:31:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-12-18 19:31:43,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:31:43,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663357273] [2023-12-18 19:31:43,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663357273] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:31:43,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061827603] [2023-12-18 19:31:43,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:31:43,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:31:43,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:31:43,091 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 19:31:43,094 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 19:31:43,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-18 19:31:43,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:31:43,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-18 19:31:43,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:31:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-12-18 19:31:43,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:31:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-12-18 19:31:44,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061827603] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:31:44,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:31:44,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 59 [2023-12-18 19:31:44,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913388577] [2023-12-18 19:31:44,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:31:44,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-12-18 19:31:44,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:31:44,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-12-18 19:31:44,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=2963, Unknown=0, NotChecked=0, Total=3422 [2023-12-18 19:31:44,142 INFO L87 Difference]: Start difference. First operand 153 states and 166 transitions. Second operand has 59 states, 59 states have (on average 1.576271186440678) internal successors, (93), 59 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:31:45,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:31:45,476 INFO L93 Difference]: Finished difference Result 346 states and 380 transitions. [2023-12-18 19:31:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-18 19:31:45,476 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.576271186440678) internal successors, (93), 59 states have internal predecessors, (93), 0 states have call successors, (0), 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 19:31:45,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:31:45,477 INFO L225 Difference]: With dead ends: 346 [2023-12-18 19:31:45,477 INFO L226 Difference]: Without dead ends: 169 [2023-12-18 19:31:45,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 145 SyntacticMatches, 12 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2448 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=954, Invalid=6018, Unknown=0, NotChecked=0, Total=6972 [2023-12-18 19:31:45,478 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 105 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2379 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 2718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-18 19:31:45,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 92 Invalid, 2718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2379 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-18 19:31:45,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-12-18 19:31:45,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 133. [2023-12-18 19:31:45,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0833333333333333) internal successors, (143), 132 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:31:45,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2023-12-18 19:31:45,577 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 89 [2023-12-18 19:31:45,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:31:45,578 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2023-12-18 19:31:45,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.576271186440678) internal successors, (93), 59 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:31:45,578 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2023-12-18 19:31:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-18 19:31:45,578 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:31:45,578 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:31:45,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-18 19:31:45,782 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 19:31:45,782 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:31:45,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:31:45,783 INFO L85 PathProgramCache]: Analyzing trace with hash 144562940, now seen corresponding path program 28 times [2023-12-18 19:31:45,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:31:45,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631375536] [2023-12-18 19:31:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:31:45,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:31:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:31:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2023-12-18 19:31:46,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:31:46,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631375536] [2023-12-18 19:31:46,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631375536] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:31:46,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495386476] [2023-12-18 19:31:46,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:31:46,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:31:46,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:31:46,094 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:31:46,095 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 19:31:46,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:31:46,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:31:46,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-18 19:31:46,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:31:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2023-12-18 19:31:46,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:31:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2023-12-18 19:31:47,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495386476] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:31:47,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:31:47,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 59 [2023-12-18 19:31:47,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94442903] [2023-12-18 19:31:47,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:31:47,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-12-18 19:31:47,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:31:47,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-12-18 19:31:47,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=2953, Unknown=0, NotChecked=0, Total=3422 [2023-12-18 19:31:47,065 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 59 states, 59 states have (on average 1.6101694915254237) internal successors, (95), 59 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:31:47,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:31:47,551 INFO L93 Difference]: Finished difference Result 190 states and 204 transitions. [2023-12-18 19:31:47,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-18 19:31:47,551 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.6101694915254237) internal successors, (95), 59 states have internal predecessors, (95), 0 states have call successors, (0), 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 19:31:47,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:31:47,551 INFO L225 Difference]: With dead ends: 190 [2023-12-18 19:31:47,552 INFO L226 Difference]: Without dead ends: 96 [2023-12-18 19:31:47,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 134 SyntacticMatches, 12 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=691, Invalid=4279, Unknown=0, NotChecked=0, Total=4970 [2023-12-18 19:31:47,553 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 90 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:31:47,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 66 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:31:47,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-18 19:31:47,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-12-18 19:31:47,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0736842105263158) internal successors, (102), 95 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:31:47,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2023-12-18 19:31:47,629 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 90 [2023-12-18 19:31:47,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:31:47,629 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2023-12-18 19:31:47,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.6101694915254237) internal successors, (95), 59 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:31:47,629 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2023-12-18 19:31:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-18 19:31:47,630 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:31:47,630 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:31:47,635 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 19:31:47,835 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 19:31:47,835 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:31:47,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:31:47,835 INFO L85 PathProgramCache]: Analyzing trace with hash -682250102, now seen corresponding path program 29 times [2023-12-18 19:31:47,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:31:47,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132935091] [2023-12-18 19:31:47,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:31:47,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:31:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:31:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 37 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:31:59,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:31:59,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132935091] [2023-12-18 19:31:59,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132935091] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:31:59,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609848385] [2023-12-18 19:31:59,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:31:59,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:31:59,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:31:59,952 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 19:31:59,953 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 19:32:00,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-18 19:32:00,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:32:00,325 WARN L260 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 310 conjunts are in the unsatisfiable core [2023-12-18 19:32:00,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:32:00,348 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 19:32:00,355 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 19:32:00,361 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 19:32:00,368 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 19:32:00,373 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 19:32:00,432 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 19:32:00,516 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 19:32:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:32:01,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:32:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-18 19:32:03,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609848385] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:32:03,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:32:03,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 39, 27] total 108 [2023-12-18 19:32:03,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949622301] [2023-12-18 19:32:03,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:32:03,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-12-18 19:32:03,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:32:03,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-12-18 19:32:03,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=11019, Unknown=0, NotChecked=0, Total=11556 [2023-12-18 19:32:03,881 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 108 states, 108 states have (on average 2.1296296296296298) internal successors, (230), 108 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:32:11,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:32:11,192 INFO L93 Difference]: Finished difference Result 256 states and 275 transitions. [2023-12-18 19:32:11,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-12-18 19:32:11,193 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.1296296296296298) internal successors, (230), 108 states have internal predecessors, (230), 0 states have call successors, (0), 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 19:32:11,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:32:11,194 INFO L225 Difference]: With dead ends: 256 [2023-12-18 19:32:11,194 INFO L226 Difference]: Without dead ends: 252 [2023-12-18 19:32:11,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5401 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1896, Invalid=23544, Unknown=0, NotChecked=0, Total=25440 [2023-12-18 19:32:11,195 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 91 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 4858 mSolverCounterSat, 543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 5401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 543 IncrementalHoareTripleChecker+Valid, 4858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-18 19:32:11,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 349 Invalid, 5401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [543 Valid, 4858 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-18 19:32:11,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-12-18 19:32:11,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 138. [2023-12-18 19:32:11,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 137 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 19:32:11,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2023-12-18 19:32:11,312 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 95 [2023-12-18 19:32:11,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:32:11,312 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2023-12-18 19:32:11,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.1296296296296298) internal successors, (230), 108 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:32:11,312 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2023-12-18 19:32:11,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-18 19:32:11,313 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:32:11,313 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:32:11,319 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 19:32:11,513 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 19:32:11,513 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:32:11,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:32:11,513 INFO L85 PathProgramCache]: Analyzing trace with hash -932300085, now seen corresponding path program 30 times [2023-12-18 19:32:11,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:32:11,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058471280] [2023-12-18 19:32:11,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:32:11,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:32:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:32:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 67 proven. 77 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-12-18 19:32:11,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:32:11,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058471280] [2023-12-18 19:32:11,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058471280] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:32:11,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575177187] [2023-12-18 19:32:11,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:32:11,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:32:11,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:32:11,848 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 19:32:11,849 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 19:32:12,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-18 19:32:12,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:32:12,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-18 19:32:12,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:32:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-12-18 19:32:12,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:32:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-12-18 19:32:12,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575177187] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:32:12,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:32:12,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-12-18 19:32:12,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457501280] [2023-12-18 19:32:12,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:32:12,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-18 19:32:12,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:32:12,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-18 19:32:12,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1258, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 19:32:12,549 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 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 19:32:13,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:32:13,016 INFO L93 Difference]: Finished difference Result 329 states and 354 transitions. [2023-12-18 19:32:13,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-18 19:32:13,016 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 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 96 [2023-12-18 19:32:13,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:32:13,020 INFO L225 Difference]: With dead ends: 329 [2023-12-18 19:32:13,020 INFO L226 Difference]: Without dead ends: 139 [2023-12-18 19:32:13,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 155 SyntacticMatches, 23 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=386, Invalid=1336, Unknown=0, NotChecked=0, Total=1722 [2023-12-18 19:32:13,020 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:32:13,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 29 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:32:13,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-12-18 19:32:13,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2023-12-18 19:32:13,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0797101449275361) internal successors, (149), 138 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:32:13,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 149 transitions. [2023-12-18 19:32:13,139 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 149 transitions. Word has length 96 [2023-12-18 19:32:13,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:32:13,139 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 149 transitions. [2023-12-18 19:32:13,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 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 19:32:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 149 transitions. [2023-12-18 19:32:13,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-12-18 19:32:13,140 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:32:13,140 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:32:13,151 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 19:32:13,346 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 19:32:13,346 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:32:13,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:32:13,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1717152253, now seen corresponding path program 31 times [2023-12-18 19:32:13,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:32:13,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371465162] [2023-12-18 19:32:13,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:32:13,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:32:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:32:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 55 proven. 89 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-12-18 19:32:13,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:32:13,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371465162] [2023-12-18 19:32:13,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371465162] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:32:13,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612160998] [2023-12-18 19:32:13,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:32:13,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:32:13,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:32:13,692 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 19:32:13,692 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 19:32:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:32:13,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-18 19:32:13,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:32:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-12-18 19:32:14,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:32:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-12-18 19:32:14,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612160998] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:32:14,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:32:14,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-12-18 19:32:14,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655618834] [2023-12-18 19:32:14,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:32:14,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-18 19:32:14,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:32:14,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-18 19:32:14,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1247, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 19:32:14,227 INFO L87 Difference]: Start difference. First operand 139 states and 149 transitions. Second operand has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 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 19:32:14,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:32:14,496 INFO L93 Difference]: Finished difference Result 214 states and 234 transitions. [2023-12-18 19:32:14,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-18 19:32:14,496 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 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 97 [2023-12-18 19:32:14,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:32:14,497 INFO L225 Difference]: With dead ends: 214 [2023-12-18 19:32:14,497 INFO L226 Difference]: Without dead ends: 103 [2023-12-18 19:32:14,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 156 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2023-12-18 19:32:14,497 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:32:14,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 48 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:32:14,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-12-18 19:32:14,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-12-18 19:32:14,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0686274509803921) internal successors, (109), 102 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 19:32:14,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 109 transitions. [2023-12-18 19:32:14,586 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 109 transitions. Word has length 97 [2023-12-18 19:32:14,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:32:14,587 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 109 transitions. [2023-12-18 19:32:14,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 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 19:32:14,587 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 109 transitions. [2023-12-18 19:32:14,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-18 19:32:14,587 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:32:14,587 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:32:14,593 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 19:32:14,793 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 19:32:14,793 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:32:14,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:32:14,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1318196256, now seen corresponding path program 32 times [2023-12-18 19:32:14,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:32:14,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24198590] [2023-12-18 19:32:14,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:32:14,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:32:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:32:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 81 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:32:28,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:32:28,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24198590] [2023-12-18 19:32:28,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24198590] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:32:28,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841166169] [2023-12-18 19:32:28,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:32:28,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:32:28,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:32:28,574 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 19:32:28,575 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 19:32:28,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:32:28,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:32:28,732 WARN L260 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 324 conjunts are in the unsatisfiable core [2023-12-18 19:32:28,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:32:29,319 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 19:32:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 546 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:32:29,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:32:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 468 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-18 19:32:33,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841166169] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:32:33,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:32:33,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 42, 29] total 125 [2023-12-18 19:32:33,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323144680] [2023-12-18 19:32:33,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:32:33,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2023-12-18 19:32:33,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:32:33,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2023-12-18 19:32:33,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=14871, Unknown=0, NotChecked=0, Total=15500 [2023-12-18 19:32:33,325 INFO L87 Difference]: Start difference. First operand 103 states and 109 transitions. Second operand has 125 states, 125 states have (on average 2.032) internal successors, (254), 125 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:32:42,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:32:42,485 INFO L93 Difference]: Finished difference Result 274 states and 293 transitions. [2023-12-18 19:32:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-12-18 19:32:42,485 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.032) internal successors, (254), 125 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2023-12-18 19:32:42,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:32:42,486 INFO L225 Difference]: With dead ends: 274 [2023-12-18 19:32:42,486 INFO L226 Difference]: Without dead ends: 270 [2023-12-18 19:32:42,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8258 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=2118, Invalid=30462, Unknown=0, NotChecked=0, Total=32580 [2023-12-18 19:32:42,488 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 6733 mSolverCounterSat, 880 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 7613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 880 IncrementalHoareTripleChecker+Valid, 6733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-12-18 19:32:42,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 463 Invalid, 7613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [880 Valid, 6733 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-12-18 19:32:42,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2023-12-18 19:32:42,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 148. [2023-12-18 19:32:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0748299319727892) internal successors, (158), 147 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:32:42,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2023-12-18 19:32:42,623 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 102 [2023-12-18 19:32:42,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:32:42,624 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2023-12-18 19:32:42,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.032) internal successors, (254), 125 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:32:42,624 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2023-12-18 19:32:42,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-18 19:32:42,624 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:32:42,624 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:32:42,635 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 19:32:42,831 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 19:32:42,831 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:32:42,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:32:42,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1036013109, now seen corresponding path program 33 times [2023-12-18 19:32:42,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:32:42,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516486593] [2023-12-18 19:32:42,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:32:42,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:32:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:32:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-12-18 19:32:43,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:32:43,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516486593] [2023-12-18 19:32:43,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516486593] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:32:43,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9157707] [2023-12-18 19:32:43,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:32:43,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:32:43,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:32:43,234 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 19:32:43,235 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 19:32:43,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-18 19:32:43,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:32:43,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-18 19:32:43,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:32:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-12-18 19:32:44,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:32:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-12-18 19:32:44,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9157707] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:32:44,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:32:44,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 69 [2023-12-18 19:32:44,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069279687] [2023-12-18 19:32:44,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:32:44,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-12-18 19:32:44,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:32:44,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-12-18 19:32:44,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=619, Invalid=4073, Unknown=0, NotChecked=0, Total=4692 [2023-12-18 19:32:44,587 INFO L87 Difference]: Start difference. First operand 148 states and 158 transitions. Second operand has 69 states, 69 states have (on average 1.4492753623188406) internal successors, (100), 69 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:32:46,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:32:46,236 INFO L93 Difference]: Finished difference Result 399 states and 432 transitions. [2023-12-18 19:32:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-12-18 19:32:46,237 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.4492753623188406) internal successors, (100), 69 states have internal predecessors, (100), 0 states have call successors, (0), 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 103 [2023-12-18 19:32:46,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:32:46,237 INFO L225 Difference]: With dead ends: 399 [2023-12-18 19:32:46,237 INFO L226 Difference]: Without dead ends: 195 [2023-12-18 19:32:46,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 167 SyntacticMatches, 14 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3414 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1280, Invalid=8226, Unknown=0, NotChecked=0, Total=9506 [2023-12-18 19:32:46,239 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 114 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2816 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 3246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 2816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:32:46,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 99 Invalid, 3246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 2816 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-18 19:32:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-12-18 19:32:46,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 153. [2023-12-18 19:32:46,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0723684210526316) internal successors, (163), 152 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:32:46,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 163 transitions. [2023-12-18 19:32:46,385 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 163 transitions. Word has length 103 [2023-12-18 19:32:46,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:32:46,385 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 163 transitions. [2023-12-18 19:32:46,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.4492753623188406) internal successors, (100), 69 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:32:46,385 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 163 transitions. [2023-12-18 19:32:46,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-12-18 19:32:46,385 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:32:46,385 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:32:46,391 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 19:32:46,588 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 19:32:46,588 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:32:46,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:32:46,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1699590396, now seen corresponding path program 34 times [2023-12-18 19:32:46,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:32:46,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379691899] [2023-12-18 19:32:46,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:32:46,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:32:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:32:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 66 proven. 103 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2023-12-18 19:32:47,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:32:47,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379691899] [2023-12-18 19:32:47,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379691899] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:32:47,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252089419] [2023-12-18 19:32:47,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:32:47,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:32:47,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:32:47,004 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 19:32:47,005 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 19:32:47,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:32:47,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:32:47,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-18 19:32:47,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:32:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2023-12-18 19:32:47,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:32:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2023-12-18 19:32:48,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252089419] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:32:48,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:32:48,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 69 [2023-12-18 19:32:48,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604995121] [2023-12-18 19:32:48,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:32:48,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-12-18 19:32:48,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:32:48,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-12-18 19:32:48,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=4061, Unknown=0, NotChecked=0, Total=4692 [2023-12-18 19:32:48,275 INFO L87 Difference]: Start difference. First operand 153 states and 163 transitions. Second operand has 69 states, 69 states have (on average 1.5217391304347827) internal successors, (105), 69 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:32:48,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:32:48,883 INFO L93 Difference]: Finished difference Result 218 states and 232 transitions. [2023-12-18 19:32:48,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-18 19:32:48,883 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.5217391304347827) internal successors, (105), 69 states have internal predecessors, (105), 0 states have call successors, (0), 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 104 [2023-12-18 19:32:48,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:32:48,883 INFO L225 Difference]: With dead ends: 218 [2023-12-18 19:32:48,883 INFO L226 Difference]: Without dead ends: 110 [2023-12-18 19:32:48,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 154 SyntacticMatches, 14 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2554 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=932, Invalid=5874, Unknown=0, NotChecked=0, Total=6806 [2023-12-18 19:32:48,885 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 110 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:32:48,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 61 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 19:32:48,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-12-18 19:32:48,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-12-18 19:32:48,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0642201834862386) internal successors, (116), 109 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:32:49,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2023-12-18 19:32:49,000 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 104 [2023-12-18 19:32:49,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:32:49,000 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2023-12-18 19:32:49,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.5217391304347827) internal successors, (105), 69 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:32:49,000 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2023-12-18 19:32:49,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-18 19:32:49,001 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:32:49,001 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:32:49,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-18 19:32:49,201 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 19:32:49,201 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:32:49,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:32:49,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1020268022, now seen corresponding path program 35 times [2023-12-18 19:32:49,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:32:49,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925153382] [2023-12-18 19:32:49,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:32:49,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:32:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:33:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 65 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:33:05,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:33:05,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925153382] [2023-12-18 19:33:05,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925153382] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:33:05,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541972654] [2023-12-18 19:33:05,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:33:05,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:33:05,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:33:05,729 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 19:33:05,731 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 19:33:06,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-18 19:33:06,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:33:06,283 WARN L260 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 348 conjunts are in the unsatisfiable core [2023-12-18 19:33:06,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:33:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 19:33:07,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:33:14,869 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:33:14,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 26 select indices, 26 select index equivalence classes, 0 disjoint index pairs (out of 325 index pairs), introduced 26 new quantified variables, introduced 325 case distinctions, treesize of input 222 treesize of output 1539 [2023-12-18 19:34:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 546 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-18 19:34:54,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541972654] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:34:54,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:34:54,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 44, 32] total 131 [2023-12-18 19:34:54,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287647090] [2023-12-18 19:34:54,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:34:54,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2023-12-18 19:34:54,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:34:54,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2023-12-18 19:34:54,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=16339, Unknown=0, NotChecked=0, Total=17030 [2023-12-18 19:34:54,673 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 131 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:35:03,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:35:03,909 INFO L93 Difference]: Finished difference Result 280 states and 299 transitions. [2023-12-18 19:35:03,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-12-18 19:35:03,909 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 131 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2023-12-18 19:35:03,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:35:03,910 INFO L225 Difference]: With dead ends: 280 [2023-12-18 19:35:03,910 INFO L226 Difference]: Without dead ends: 276 [2023-12-18 19:35:03,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8455 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=1849, Invalid=30013, Unknown=0, NotChecked=0, Total=31862 [2023-12-18 19:35:03,926 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 76 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 6955 mSolverCounterSat, 581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 7536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 6955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-18 19:35:03,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 445 Invalid, 7536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 6955 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-12-18 19:35:03,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-12-18 19:35:04,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 158. [2023-12-18 19:35:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.070063694267516) internal successors, (168), 157 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:35:04,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 168 transitions. [2023-12-18 19:35:04,108 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 168 transitions. Word has length 109 [2023-12-18 19:35:04,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:35:04,108 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 168 transitions. [2023-12-18 19:35:04,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 131 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:35:04,109 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 168 transitions. [2023-12-18 19:35:04,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-18 19:35:04,109 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:35:04,109 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:35:04,119 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 19:35:04,317 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 19:35:04,317 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:35:04,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:35:04,318 INFO L85 PathProgramCache]: Analyzing trace with hash -367306421, now seen corresponding path program 36 times [2023-12-18 19:35:04,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:35:04,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510983066] [2023-12-18 19:35:04,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:35:04,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:35:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:35:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 92 proven. 104 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-12-18 19:35:04,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:35:04,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510983066] [2023-12-18 19:35:04,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510983066] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:35:04,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335888495] [2023-12-18 19:35:04,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:35:04,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:35:04,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:35:04,776 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 19:35:04,777 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 19:35:05,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-12-18 19:35:05,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:35:05,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-18 19:35:05,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:35:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-12-18 19:35:05,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:35:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-12-18 19:35:06,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335888495] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:35:06,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:35:06,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 74 [2023-12-18 19:35:06,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624542525] [2023-12-18 19:35:06,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:35:06,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-12-18 19:35:06,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:35:06,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-12-18 19:35:06,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=4694, Unknown=0, NotChecked=0, Total=5402 [2023-12-18 19:35:06,454 INFO L87 Difference]: Start difference. First operand 158 states and 168 transitions. Second operand has 74 states, 74 states have (on average 1.5) internal successors, (111), 74 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:35:08,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:35:08,426 INFO L93 Difference]: Finished difference Result 426 states and 459 transitions. [2023-12-18 19:35:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-18 19:35:08,426 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.5) internal successors, (111), 74 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2023-12-18 19:35:08,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:35:08,427 INFO L225 Difference]: With dead ends: 426 [2023-12-18 19:35:08,427 INFO L226 Difference]: Without dead ends: 208 [2023-12-18 19:35:08,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 178 SyntacticMatches, 15 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3957 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1461, Invalid=9459, Unknown=0, NotChecked=0, Total=10920 [2023-12-18 19:35:08,428 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 76 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 3101 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 3624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 3101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:35:08,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 102 Invalid, 3624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 3101 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-18 19:35:08,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-12-18 19:35:08,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 163. [2023-12-18 19:35:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0679012345679013) internal successors, (173), 162 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:35:08,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 173 transitions. [2023-12-18 19:35:08,622 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 173 transitions. Word has length 110 [2023-12-18 19:35:08,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:35:08,622 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 173 transitions. [2023-12-18 19:35:08,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.5) internal successors, (111), 74 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:35:08,622 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 173 transitions. [2023-12-18 19:35:08,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-12-18 19:35:08,623 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:35:08,623 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:35:08,638 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 19:35:08,828 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 19:35:08,829 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:35:08,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:35:08,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1159787658, now seen corresponding path program 37 times [2023-12-18 19:35:08,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:35:08,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280418913] [2023-12-18 19:35:08,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:35:08,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:35:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:35:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 78 proven. 118 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2023-12-18 19:35:09,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:35:09,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280418913] [2023-12-18 19:35:09,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280418913] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:35:09,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020620320] [2023-12-18 19:35:09,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:35:09,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:35:09,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:35:09,298 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 19:35:09,303 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 19:35:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:35:09,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-18 19:35:09,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:35:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2023-12-18 19:35:09,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:35:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2023-12-18 19:35:10,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020620320] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:35:10,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:35:10,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-12-18 19:35:10,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119148510] [2023-12-18 19:35:10,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:35:10,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-18 19:35:10,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:35:10,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-18 19:35:10,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=1649, Unknown=0, NotChecked=0, Total=2162 [2023-12-18 19:35:10,019 INFO L87 Difference]: Start difference. First operand 163 states and 173 transitions. Second operand has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 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 19:35:10,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:35:10,418 INFO L93 Difference]: Finished difference Result 232 states and 246 transitions. [2023-12-18 19:35:10,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-18 19:35:10,418 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2023-12-18 19:35:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:35:10,418 INFO L225 Difference]: With dead ends: 232 [2023-12-18 19:35:10,418 INFO L226 Difference]: Without dead ends: 117 [2023-12-18 19:35:10,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 178 SyntacticMatches, 28 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1726, Unknown=0, NotChecked=0, Total=2256 [2023-12-18 19:35:10,419 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:35:10,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 66 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:35:10,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-12-18 19:35:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-12-18 19:35:10,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0603448275862069) internal successors, (123), 116 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:35:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2023-12-18 19:35:10,584 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 111 [2023-12-18 19:35:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:35:10,584 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2023-12-18 19:35:10,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 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 19:35:10,584 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2023-12-18 19:35:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-18 19:35:10,585 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:35:10,585 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:35:10,590 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 19:35:10,785 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 19:35:10,785 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:35:10,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:35:10,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1638722976, now seen corresponding path program 38 times [2023-12-18 19:35:10,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:35:10,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902185699] [2023-12-18 19:35:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:35:10,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:35:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:35:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 67 proven. 668 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:35:29,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:35:29,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902185699] [2023-12-18 19:35:29,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902185699] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:35:29,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028747150] [2023-12-18 19:35:29,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:35:29,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:35:29,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:35:29,587 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 19:35:29,588 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 19:35:29,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:35:29,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:35:29,795 WARN L260 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 376 conjunts are in the unsatisfiable core [2023-12-18 19:35:29,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:35:29,980 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 19:35:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:35:30,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:35:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-18 19:35:35,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028747150] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:35:35,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:35:35,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 48, 33] total 136 [2023-12-18 19:35:35,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336021897] [2023-12-18 19:35:35,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:35:35,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2023-12-18 19:35:35,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:35:35,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2023-12-18 19:35:35,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=17515, Unknown=0, NotChecked=0, Total=18360 [2023-12-18 19:35:35,367 INFO L87 Difference]: Start difference. First operand 117 states and 123 transitions. Second operand has 136 states, 136 states have (on average 2.073529411764706) internal successors, (282), 136 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:35:45,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:35:45,866 INFO L93 Difference]: Finished difference Result 310 states and 329 transitions. [2023-12-18 19:35:45,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-12-18 19:35:45,866 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.073529411764706) internal successors, (282), 136 states have internal predecessors, (282), 0 states have call successors, (0), 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 116 [2023-12-18 19:35:45,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:35:45,867 INFO L225 Difference]: With dead ends: 310 [2023-12-18 19:35:45,867 INFO L226 Difference]: Without dead ends: 306 [2023-12-18 19:35:45,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 205 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8784 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=2307, Invalid=33225, Unknown=0, NotChecked=0, Total=35532 [2023-12-18 19:35:45,869 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 7457 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 8076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 7457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-12-18 19:35:45,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 442 Invalid, 8076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 7457 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-12-18 19:35:45,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-12-18 19:35:46,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 168. [2023-12-18 19:35:46,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0658682634730539) internal successors, (178), 167 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:35:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 178 transitions. [2023-12-18 19:35:46,098 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 178 transitions. Word has length 116 [2023-12-18 19:35:46,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:35:46,098 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 178 transitions. [2023-12-18 19:35:46,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.073529411764706) internal successors, (282), 136 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:35:46,098 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 178 transitions. [2023-12-18 19:35:46,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-12-18 19:35:46,098 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:35:46,099 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:35:46,105 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 19:35:46,300 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 19:35:46,301 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:35:46,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:35:46,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1129076299, now seen corresponding path program 39 times [2023-12-18 19:35:46,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:35:46,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546257371] [2023-12-18 19:35:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:35:46,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:35:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:35:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 106 proven. 119 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-12-18 19:35:46,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:35:46,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546257371] [2023-12-18 19:35:46,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546257371] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:35:46,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295055120] [2023-12-18 19:35:46,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:35:46,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:35:46,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:35:46,807 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 19:35:46,808 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 19:35:47,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-18 19:35:47,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:35:47,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-18 19:35:47,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:35:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-12-18 19:35:47,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:35:47,975 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-12-18 19:35:47,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295055120] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:35:47,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:35:47,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-12-18 19:35:47,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233803390] [2023-12-18 19:35:47,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:35:47,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-18 19:35:47,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:35:47,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-18 19:35:47,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=1885, Unknown=0, NotChecked=0, Total=2450 [2023-12-18 19:35:47,977 INFO L87 Difference]: Start difference. First operand 168 states and 178 transitions. Second operand has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 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 19:35:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:35:48,732 INFO L93 Difference]: Finished difference Result 401 states and 426 transitions. [2023-12-18 19:35:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-18 19:35:48,732 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 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 117 [2023-12-18 19:35:48,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:35:48,733 INFO L225 Difference]: With dead ends: 401 [2023-12-18 19:35:48,733 INFO L226 Difference]: Without dead ends: 169 [2023-12-18 19:35:48,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 188 SyntacticMatches, 29 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=569, Invalid=1981, Unknown=0, NotChecked=0, Total=2550 [2023-12-18 19:35:48,733 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:35:48,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 47 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 19:35:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-12-18 19:35:48,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-12-18 19:35:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0654761904761905) internal successors, (179), 168 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:35:48,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 179 transitions. [2023-12-18 19:35:48,961 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 179 transitions. Word has length 117 [2023-12-18 19:35:48,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:35:48,961 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 179 transitions. [2023-12-18 19:35:48,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 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 19:35:48,961 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 179 transitions. [2023-12-18 19:35:48,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-12-18 19:35:48,962 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:35:48,962 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:35:48,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-12-18 19:35:49,164 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 19:35:49,164 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:35:49,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:35:49,165 INFO L85 PathProgramCache]: Analyzing trace with hash -776860221, now seen corresponding path program 40 times [2023-12-18 19:35:49,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:35:49,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177197360] [2023-12-18 19:35:49,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:35:49,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:35:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:35:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 91 proven. 134 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-12-18 19:35:49,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:35:49,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177197360] [2023-12-18 19:35:49,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177197360] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:35:49,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266355398] [2023-12-18 19:35:49,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:35:49,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:35:49,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:35:49,686 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 19:35:49,687 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 19:35:49,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:35:49,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:35:49,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-18 19:35:49,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:35:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-12-18 19:35:50,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:35:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-12-18 19:35:51,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266355398] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:35:51,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:35:51,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 79 [2023-12-18 19:35:51,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43518739] [2023-12-18 19:35:51,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:35:51,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-12-18 19:35:51,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:35:51,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-12-18 19:35:51,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=817, Invalid=5345, Unknown=0, NotChecked=0, Total=6162 [2023-12-18 19:35:51,223 INFO L87 Difference]: Start difference. First operand 169 states and 179 transitions. Second operand has 79 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 79 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 19:35:52,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:35:52,062 INFO L93 Difference]: Finished difference Result 259 states and 279 transitions. [2023-12-18 19:35:52,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-18 19:35:52,062 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 79 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 118 [2023-12-18 19:35:52,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:35:52,063 INFO L225 Difference]: With dead ends: 259 [2023-12-18 19:35:52,063 INFO L226 Difference]: Without dead ends: 124 [2023-12-18 19:35:52,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 174 SyntacticMatches, 16 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3413 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1209, Invalid=7721, Unknown=0, NotChecked=0, Total=8930 [2023-12-18 19:35:52,065 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 117 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:35:52,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 87 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 19:35:52,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-18 19:35:52,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-12-18 19:35:52,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.056910569105691) internal successors, (130), 123 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:35:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2023-12-18 19:35:52,260 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 118 [2023-12-18 19:35:52,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:35:52,260 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2023-12-18 19:35:52,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 79 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 19:35:52,261 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2023-12-18 19:35:52,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-18 19:35:52,261 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:35:52,261 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:35:52,278 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 19:35:52,476 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 19:35:52,476 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:35:52,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:35:52,477 INFO L85 PathProgramCache]: Analyzing trace with hash -740834422, now seen corresponding path program 41 times [2023-12-18 19:35:52,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:35:52,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131198535] [2023-12-18 19:35:52,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:35:52,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:35:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:36:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 99 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:36:17,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:36:17,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131198535] [2023-12-18 19:36:17,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131198535] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:36:17,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750233288] [2023-12-18 19:36:17,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:36:17,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:36:17,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:36:17,438 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 19:36:17,439 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 19:36:17,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-12-18 19:36:17,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:36:17,997 WARN L260 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 402 conjunts are in the unsatisfiable core [2023-12-18 19:36:18,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:36:18,599 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 19:36:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:36:19,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:36:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 720 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-12-18 19:36:25,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750233288] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:36:25,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:36:25,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 51, 35] total 153 [2023-12-18 19:36:25,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304706204] [2023-12-18 19:36:25,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:36:25,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2023-12-18 19:36:25,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:36:25,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2023-12-18 19:36:25,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=801, Invalid=22455, Unknown=0, NotChecked=0, Total=23256 [2023-12-18 19:36:25,997 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand has 153 states, 153 states have (on average 2.0) internal successors, (306), 153 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:36:42,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:36:42,545 INFO L93 Difference]: Finished difference Result 328 states and 347 transitions. [2023-12-18 19:36:42,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-12-18 19:36:42,545 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 2.0) internal successors, (306), 153 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2023-12-18 19:36:42,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:36:42,546 INFO L225 Difference]: With dead ends: 328 [2023-12-18 19:36:42,546 INFO L226 Difference]: Without dead ends: 324 [2023-12-18 19:36:42,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13054 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=3794, Invalid=50728, Unknown=0, NotChecked=0, Total=54522 [2023-12-18 19:36:42,548 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 126 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 9299 mSolverCounterSat, 1168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 10467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1168 IncrementalHoareTripleChecker+Valid, 9299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:36:42,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 530 Invalid, 10467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1168 Valid, 9299 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-12-18 19:36:42,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-12-18 19:36:42,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 178. [2023-12-18 19:36:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.0621468926553672) internal successors, (188), 177 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:36:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 188 transitions. [2023-12-18 19:36:42,799 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 188 transitions. Word has length 123 [2023-12-18 19:36:42,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:36:42,799 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 188 transitions. [2023-12-18 19:36:42,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 2.0) internal successors, (306), 153 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:36:42,800 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 188 transitions. [2023-12-18 19:36:42,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-18 19:36:42,800 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:36:42,800 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:36:42,810 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 19:36:43,000 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 19:36:43,001 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:36:43,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:36:43,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1236129845, now seen corresponding path program 42 times [2023-12-18 19:36:43,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:36:43,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508021311] [2023-12-18 19:36:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:36:43,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:36:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:36:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 121 proven. 135 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2023-12-18 19:36:43,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:36:43,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508021311] [2023-12-18 19:36:43,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508021311] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:36:43,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364388422] [2023-12-18 19:36:43,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:36:43,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:36:43,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:36:43,587 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:36:43,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-18 19:36:44,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-12-18 19:36:44,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:36:44,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-18 19:36:44,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:36:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2023-12-18 19:36:44,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:36:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2023-12-18 19:36:44,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364388422] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:36:44,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:36:44,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2023-12-18 19:36:44,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277743575] [2023-12-18 19:36:44,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:36:44,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-18 19:36:44,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:36:44,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-18 19:36:44,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=2122, Unknown=0, NotChecked=0, Total=2756 [2023-12-18 19:36:44,928 INFO L87 Difference]: Start difference. First operand 178 states and 188 transitions. Second operand has 53 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 53 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 19:36:45,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:36:45,813 INFO L93 Difference]: Finished difference Result 425 states and 450 transitions. [2023-12-18 19:36:45,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-18 19:36:45,814 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 53 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 124 [2023-12-18 19:36:45,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:36:45,814 INFO L225 Difference]: With dead ends: 425 [2023-12-18 19:36:45,814 INFO L226 Difference]: Without dead ends: 179 [2023-12-18 19:36:45,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 199 SyntacticMatches, 31 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1755 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=638, Invalid=2224, Unknown=0, NotChecked=0, Total=2862 [2023-12-18 19:36:45,815 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 19:36:45,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 56 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 19:36:45,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-12-18 19:36:46,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2023-12-18 19:36:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0617977528089888) internal successors, (189), 178 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:36:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 189 transitions. [2023-12-18 19:36:46,068 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 189 transitions. Word has length 124 [2023-12-18 19:36:46,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:36:46,069 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 189 transitions. [2023-12-18 19:36:46,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 53 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 19:36:46,069 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 189 transitions. [2023-12-18 19:36:46,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-18 19:36:46,069 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:36:46,069 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:36:46,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-12-18 19:36:46,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:36:46,272 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:36:46,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:36:46,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1265350653, now seen corresponding path program 43 times [2023-12-18 19:36:46,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:36:46,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718594526] [2023-12-18 19:36:46,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:36:46,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:36:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:36:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 105 proven. 151 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2023-12-18 19:36:46,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:36:46,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718594526] [2023-12-18 19:36:46,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718594526] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:36:46,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357073404] [2023-12-18 19:36:46,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:36:46,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:36:46,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:36:46,865 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:36:46,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-18 19:36:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:36:47,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-18 19:36:47,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:36:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2023-12-18 19:36:47,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:36:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2023-12-18 19:36:47,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357073404] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:36:47,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:36:47,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2023-12-18 19:36:47,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950606418] [2023-12-18 19:36:47,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:36:47,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-18 19:36:47,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:36:47,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-18 19:36:47,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=2107, Unknown=0, NotChecked=0, Total=2756 [2023-12-18 19:36:47,714 INFO L87 Difference]: Start difference. First operand 179 states and 189 transitions. Second operand has 53 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 53 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 19:36:48,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:36:48,196 INFO L93 Difference]: Finished difference Result 274 states and 294 transitions. [2023-12-18 19:36:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-18 19:36:48,197 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 53 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 125 [2023-12-18 19:36:48,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:36:48,197 INFO L225 Difference]: With dead ends: 274 [2023-12-18 19:36:48,197 INFO L226 Difference]: Without dead ends: 131 [2023-12-18 19:36:48,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 200 SyntacticMatches, 32 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2023-12-18 19:36:48,198 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:36:48,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 41 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:36:48,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-12-18 19:36:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-12-18 19:36:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0538461538461539) internal successors, (137), 130 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:36:48,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 137 transitions. [2023-12-18 19:36:48,387 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 137 transitions. Word has length 125 [2023-12-18 19:36:48,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:36:48,387 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 137 transitions. [2023-12-18 19:36:48,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 53 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 19:36:48,387 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 137 transitions. [2023-12-18 19:36:48,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-18 19:36:48,387 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:36:48,387 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:36:48,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-12-18 19:36:48,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-12-18 19:36:48,593 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:36:48,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:36:48,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1142278368, now seen corresponding path program 44 times [2023-12-18 19:36:48,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:36:48,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544989974] [2023-12-18 19:36:48,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:36:48,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:36:49,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 97 proven. 855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:37:18,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:18,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544989974] [2023-12-18 19:37:18,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544989974] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:37:18,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426013100] [2023-12-18 19:37:18,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:37:18,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:18,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:37:18,244 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:37:18,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-12-18 19:37:18,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:37:18,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:37:18,488 WARN L260 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 428 conjunts are in the unsatisfiable core [2023-12-18 19:37:18,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:37:18,906 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 19:37:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 952 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:37:19,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:37:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 816 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-12-18 19:37:26,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426013100] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:37:26,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:37:26,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 54, 37] total 156 [2023-12-18 19:37:26,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952894974] [2023-12-18 19:37:26,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:37:26,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2023-12-18 19:37:26,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:26,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2023-12-18 19:37:26,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=23360, Unknown=0, NotChecked=0, Total=24180 [2023-12-18 19:37:26,863 INFO L87 Difference]: Start difference. First operand 131 states and 137 transitions. Second operand has 156 states, 156 states have (on average 2.032051282051282) internal successors, (317), 156 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:47,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:47,445 INFO L93 Difference]: Finished difference Result 346 states and 365 transitions. [2023-12-18 19:37:47,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-12-18 19:37:47,445 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 2.032051282051282) internal successors, (317), 156 states have internal predecessors, (317), 0 states have call successors, (0), 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 130 [2023-12-18 19:37:47,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:47,446 INFO L225 Difference]: With dead ends: 346 [2023-12-18 19:37:47,446 INFO L226 Difference]: Without dead ends: 342 [2023-12-18 19:37:47,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12719 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=4187, Invalid=54135, Unknown=0, NotChecked=0, Total=58322 [2023-12-18 19:37:47,449 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 10293 mSolverCounterSat, 1000 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 11293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1000 IncrementalHoareTripleChecker+Valid, 10293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:47,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 569 Invalid, 11293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1000 Valid, 10293 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2023-12-18 19:37:47,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-12-18 19:37:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 188. [2023-12-18 19:37:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0588235294117647) internal successors, (198), 187 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 198 transitions. [2023-12-18 19:37:47,773 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 198 transitions. Word has length 130 [2023-12-18 19:37:47,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:47,773 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 198 transitions. [2023-12-18 19:37:47,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 2.032051282051282) internal successors, (317), 156 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:47,774 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 198 transitions. [2023-12-18 19:37:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-18 19:37:47,774 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:47,774 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:37:47,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-12-18 19:37:47,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-12-18 19:37:47,975 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:47,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:47,975 INFO L85 PathProgramCache]: Analyzing trace with hash -171780811, now seen corresponding path program 45 times [2023-12-18 19:37:47,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:47,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72252700] [2023-12-18 19:37:47,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:47,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 137 proven. 152 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2023-12-18 19:37:48,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:48,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72252700] [2023-12-18 19:37:48,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72252700] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:37:48,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300528375] [2023-12-18 19:37:48,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:37:48,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:48,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:37:48,636 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:37:48,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-18 19:37:49,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-12-18 19:37:49,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:37:49,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-18 19:37:49,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:37:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2023-12-18 19:37:50,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:37:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2023-12-18 19:37:50,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300528375] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:37:50,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:37:50,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 89 [2023-12-18 19:37:50,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154492862] [2023-12-18 19:37:50,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:37:50,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-12-18 19:37:50,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:50,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-12-18 19:37:50,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=6821, Unknown=0, NotChecked=0, Total=7832 [2023-12-18 19:37:50,975 INFO L87 Difference]: Start difference. First operand 188 states and 198 transitions. Second operand has 89 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 89 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:53,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:53,935 INFO L93 Difference]: Finished difference Result 507 states and 540 transitions. [2023-12-18 19:37:53,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-12-18 19:37:53,935 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 89 states have internal predecessors, (117), 0 states have call successors, (0), 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 131 [2023-12-18 19:37:53,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:53,936 INFO L225 Difference]: With dead ends: 507 [2023-12-18 19:37:53,936 INFO L226 Difference]: Without dead ends: 247 [2023-12-18 19:37:53,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 211 SyntacticMatches, 18 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5826 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2076, Invalid=13674, Unknown=0, NotChecked=0, Total=15750 [2023-12-18 19:37:53,937 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 165 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 3438 mSolverCounterSat, 613 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 4051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 613 IncrementalHoareTripleChecker+Valid, 3438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:53,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 98 Invalid, 4051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [613 Valid, 3438 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-18 19:37:53,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-12-18 19:37:54,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 193. [2023-12-18 19:37:54,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0572916666666667) internal successors, (203), 192 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:54,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 203 transitions. [2023-12-18 19:37:54,236 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 203 transitions. Word has length 131 [2023-12-18 19:37:54,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:54,237 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 203 transitions. [2023-12-18 19:37:54,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 89 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:54,237 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 203 transitions. [2023-12-18 19:37:54,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-12-18 19:37:54,237 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:54,237 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:37:54,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-12-18 19:37:54,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-12-18 19:37:54,438 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:54,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:54,438 INFO L85 PathProgramCache]: Analyzing trace with hash -489378564, now seen corresponding path program 46 times [2023-12-18 19:37:54,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:54,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989131319] [2023-12-18 19:37:54,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:54,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:37:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 120 proven. 169 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2023-12-18 19:37:55,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:37:55,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989131319] [2023-12-18 19:37:55,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989131319] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:37:55,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861502798] [2023-12-18 19:37:55,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:37:55,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:55,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:37:55,105 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:37:55,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-18 19:37:55,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:37:55,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:37:55,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-18 19:37:55,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:37:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2023-12-18 19:37:56,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:37:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2023-12-18 19:37:57,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861502798] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:37:57,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:37:57,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 89 [2023-12-18 19:37:57,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736301975] [2023-12-18 19:37:57,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:37:57,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-12-18 19:37:57,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:37:57,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-12-18 19:37:57,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=6805, Unknown=0, NotChecked=0, Total=7832 [2023-12-18 19:37:57,193 INFO L87 Difference]: Start difference. First operand 193 states and 203 transitions. Second operand has 89 states, 89 states have (on average 1.404494382022472) internal successors, (125), 89 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:58,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:37:58,432 INFO L93 Difference]: Finished difference Result 274 states and 288 transitions. [2023-12-18 19:37:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-18 19:37:58,433 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.404494382022472) internal successors, (125), 89 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-12-18 19:37:58,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:37:58,433 INFO L225 Difference]: With dead ends: 274 [2023-12-18 19:37:58,433 INFO L226 Difference]: Without dead ends: 138 [2023-12-18 19:37:58,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 194 SyntacticMatches, 18 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4396 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1522, Invalid=9820, Unknown=0, NotChecked=0, Total=11342 [2023-12-18 19:37:58,434 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 136 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 19:37:58,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 59 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 19:37:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-12-18 19:37:58,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2023-12-18 19:37:58,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.051094890510949) internal successors, (144), 137 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:58,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 144 transitions. [2023-12-18 19:37:58,671 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 144 transitions. Word has length 132 [2023-12-18 19:37:58,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:37:58,671 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 144 transitions. [2023-12-18 19:37:58,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.404494382022472) internal successors, (125), 89 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:37:58,671 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 144 transitions. [2023-12-18 19:37:58,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-18 19:37:58,671 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:37:58,671 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:37:58,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-12-18 19:37:58,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:37:58,872 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:37:58,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:37:58,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1325212938, now seen corresponding path program 47 times [2023-12-18 19:37:58,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:37:58,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550077164] [2023-12-18 19:37:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:37:58,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:37:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:38:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 91 proven. 980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:38:34,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:38:34,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550077164] [2023-12-18 19:38:34,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550077164] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:38:34,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849819180] [2023-12-18 19:38:34,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:38:34,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:38:34,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:38:34,307 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:38:34,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-18 19:38:34,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-12-18 19:38:34,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:38:34,935 WARN L260 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 456 conjunts are in the unsatisfiable core [2023-12-18 19:38:34,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:38:35,177 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 19:38:35,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:38:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:38:36,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:38:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 918 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-12-18 19:38:43,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849819180] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:38:43,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:38:43,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 57, 39] total 165 [2023-12-18 19:38:43,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556309760] [2023-12-18 19:38:43,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:38:43,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2023-12-18 19:38:43,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:38:43,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2023-12-18 19:38:43,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1192, Invalid=25868, Unknown=0, NotChecked=0, Total=27060 [2023-12-18 19:38:43,910 INFO L87 Difference]: Start difference. First operand 138 states and 144 transitions. Second operand has 165 states, 165 states have (on average 2.018181818181818) internal successors, (333), 165 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:39:02,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:39:02,341 INFO L93 Difference]: Finished difference Result 397 states and 418 transitions. [2023-12-18 19:39:02,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2023-12-18 19:39:02,341 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 2.018181818181818) internal successors, (333), 165 states have internal predecessors, (333), 0 states have call successors, (0), 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 137 [2023-12-18 19:39:02,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:39:02,342 INFO L225 Difference]: With dead ends: 397 [2023-12-18 19:39:02,343 INFO L226 Difference]: Without dead ends: 393 [2023-12-18 19:39:02,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14014 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=3149, Invalid=50907, Unknown=0, NotChecked=0, Total=54056 [2023-12-18 19:39:02,345 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 68 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 11967 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 12552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 11967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-12-18 19:39:02,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 412 Invalid, 12552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 11967 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2023-12-18 19:39:02,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-12-18 19:39:02,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 277. [2023-12-18 19:39:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.065217391304348) internal successors, (294), 276 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:39:02,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 294 transitions. [2023-12-18 19:39:02,817 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 294 transitions. Word has length 137 [2023-12-18 19:39:02,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:39:02,818 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 294 transitions. [2023-12-18 19:39:02,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 2.018181818181818) internal successors, (333), 165 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:39:02,818 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 294 transitions. [2023-12-18 19:39:02,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-18 19:39:02,818 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:39:02,818 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:39:02,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-12-18 19:39:03,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-12-18 19:39:03,020 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:39:03,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:39:03,020 INFO L85 PathProgramCache]: Analyzing trace with hash -595941813, now seen corresponding path program 48 times [2023-12-18 19:39:03,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:39:03,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161970904] [2023-12-18 19:39:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:39:03,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:39:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:39:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 154 proven. 170 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2023-12-18 19:39:03,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:39:03,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161970904] [2023-12-18 19:39:03,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161970904] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:39:03,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29060552] [2023-12-18 19:39:03,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:39:03,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:39:03,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:39:03,713 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:39:03,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-12-18 19:39:04,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-12-18 19:39:04,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:39:04,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-18 19:39:04,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:39:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2023-12-18 19:39:05,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:39:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2023-12-18 19:39:06,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29060552] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:39:06,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:39:06,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 94 [2023-12-18 19:39:06,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103900607] [2023-12-18 19:39:06,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:39:06,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2023-12-18 19:39:06,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:39:06,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2023-12-18 19:39:06,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1124, Invalid=7618, Unknown=0, NotChecked=0, Total=8742 [2023-12-18 19:39:06,117 INFO L87 Difference]: Start difference. First operand 277 states and 294 transitions. Second operand has 94 states, 94 states have (on average 1.297872340425532) internal successors, (122), 94 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:39:08,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:39:08,966 INFO L93 Difference]: Finished difference Result 554 states and 589 transitions. [2023-12-18 19:39:08,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-12-18 19:39:08,966 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.297872340425532) internal successors, (122), 94 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2023-12-18 19:39:08,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:39:08,967 INFO L225 Difference]: With dead ends: 554 [2023-12-18 19:39:08,967 INFO L226 Difference]: Without dead ends: 280 [2023-12-18 19:39:08,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 222 SyntacticMatches, 19 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6529 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2305, Invalid=15251, Unknown=0, NotChecked=0, Total=17556 [2023-12-18 19:39:08,968 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 101 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 3750 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 4357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 3750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:39:08,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 109 Invalid, 4357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 3750 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-18 19:39:08,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-12-18 19:39:09,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 203. [2023-12-18 19:39:09,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.0544554455445545) internal successors, (213), 202 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:39:09,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 213 transitions. [2023-12-18 19:39:09,325 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 213 transitions. Word has length 138 [2023-12-18 19:39:09,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:39:09,325 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 213 transitions. [2023-12-18 19:39:09,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.297872340425532) internal successors, (122), 94 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:39:09,325 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 213 transitions. [2023-12-18 19:39:09,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-12-18 19:39:09,326 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:39:09,326 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:39:09,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-12-18 19:39:09,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:39:09,529 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:39:09,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:39:09,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1072129674, now seen corresponding path program 49 times [2023-12-18 19:39:09,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:39:09,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467609648] [2023-12-18 19:39:09,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:39:09,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:39:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:39:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 136 proven. 188 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2023-12-18 19:39:10,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:39:10,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467609648] [2023-12-18 19:39:10,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467609648] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:39:10,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794321297] [2023-12-18 19:39:10,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:39:10,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:39:10,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:39:10,275 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:39:10,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-12-18 19:39:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:39:10,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-18 19:39:10,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:39:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2023-12-18 19:39:10,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:39:11,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2023-12-18 19:39:11,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794321297] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:39:11,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:39:11,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2023-12-18 19:39:11,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568146747] [2023-12-18 19:39:11,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:39:11,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-12-18 19:39:11,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:39:11,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-12-18 19:39:11,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=801, Invalid=2621, Unknown=0, NotChecked=0, Total=3422 [2023-12-18 19:39:11,321 INFO L87 Difference]: Start difference. First operand 203 states and 213 transitions. Second operand has 59 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 59 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:39:11,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:39:11,873 INFO L93 Difference]: Finished difference Result 288 states and 302 transitions. [2023-12-18 19:39:11,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-18 19:39:11,874 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 59 states have internal predecessors, (81), 0 states have call successors, (0), 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 139 [2023-12-18 19:39:11,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:39:11,874 INFO L225 Difference]: With dead ends: 288 [2023-12-18 19:39:11,874 INFO L226 Difference]: Without dead ends: 145 [2023-12-18 19:39:11,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 222 SyntacticMatches, 36 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=2718, Unknown=0, NotChecked=0, Total=3540 [2023-12-18 19:39:11,875 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 19:39:11,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 40 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 19:39:11,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-12-18 19:39:12,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-12-18 19:39:12,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0486111111111112) internal successors, (151), 144 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:39:12,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 151 transitions. [2023-12-18 19:39:12,163 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 151 transitions. Word has length 139 [2023-12-18 19:39:12,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:39:12,163 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 151 transitions. [2023-12-18 19:39:12,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 59 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:39:12,163 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 151 transitions. [2023-12-18 19:39:12,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-12-18 19:39:12,164 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:39:12,164 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:39:12,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-12-18 19:39:12,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-12-18 19:39:12,367 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:39:12,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:39:12,368 INFO L85 PathProgramCache]: Analyzing trace with hash 2077880480, now seen corresponding path program 50 times [2023-12-18 19:39:12,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:39:12,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79697807] [2023-12-18 19:39:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:39:12,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:39:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:39:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 105 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:39:51,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:39:51,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79697807] [2023-12-18 19:39:51,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79697807] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:39:51,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96546450] [2023-12-18 19:39:51,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:39:51,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:39:51,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:39:51,244 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:39:51,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-12-18 19:39:51,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:39:51,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:39:51,531 WARN L260 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 480 conjunts are in the unsatisfiable core [2023-12-18 19:39:51,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:39:52,961 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 19:39:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 1197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:39:54,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:40:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 1026 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-12-18 19:40:02,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96546450] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:40:02,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:40:02,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 60, 41] total 187 [2023-12-18 19:40:02,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485904773] [2023-12-18 19:40:02,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:40:02,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 187 states [2023-12-18 19:40:02,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:40:02,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 187 interpolants. [2023-12-18 19:40:02,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1503, Invalid=33279, Unknown=0, NotChecked=0, Total=34782 [2023-12-18 19:40:02,846 INFO L87 Difference]: Start difference. First operand 145 states and 151 transitions. Second operand has 187 states, 187 states have (on average 1.9411764705882353) internal successors, (363), 187 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:40:25,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:40:25,832 INFO L93 Difference]: Finished difference Result 400 states and 423 transitions. [2023-12-18 19:40:25,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2023-12-18 19:40:25,832 INFO L78 Accepts]: Start accepts. Automaton has has 187 states, 187 states have (on average 1.9411764705882353) internal successors, (363), 187 states have internal predecessors, (363), 0 states have call successors, (0), 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 144 [2023-12-18 19:40:25,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:40:25,833 INFO L225 Difference]: With dead ends: 400 [2023-12-18 19:40:25,833 INFO L226 Difference]: Without dead ends: 396 [2023-12-18 19:40:25,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21852 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=4314, Invalid=67778, Unknown=0, NotChecked=0, Total=72092 [2023-12-18 19:40:25,836 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 12158 mSolverCounterSat, 637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 12795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 12158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-12-18 19:40:25,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 371 Invalid, 12795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 12158 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2023-12-18 19:40:25,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-12-18 19:40:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 249. [2023-12-18 19:40:26,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0564516129032258) internal successors, (262), 248 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 19:40:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 262 transitions. [2023-12-18 19:40:26,361 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 262 transitions. Word has length 144 [2023-12-18 19:40:26,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:40:26,361 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 262 transitions. [2023-12-18 19:40:26,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 187 states, 187 states have (on average 1.9411764705882353) internal successors, (363), 187 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:40:26,361 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 262 transitions. [2023-12-18 19:40:26,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-12-18 19:40:26,362 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:40:26,362 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:40:26,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-12-18 19:40:26,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-12-18 19:40:26,562 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:40:26,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:40:26,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1552273589, now seen corresponding path program 51 times [2023-12-18 19:40:26,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:40:26,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921849492] [2023-12-18 19:40:26,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:40:26,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:40:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:40:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 172 proven. 189 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2023-12-18 19:40:27,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:40:27,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921849492] [2023-12-18 19:40:27,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921849492] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:40:27,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981181837] [2023-12-18 19:40:27,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:40:27,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:40:27,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:40:27,350 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:40:27,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-12-18 19:40:28,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-18 19:40:28,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:40:28,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-18 19:40:28,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:40:29,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2023-12-18 19:40:29,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:40:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2023-12-18 19:40:30,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981181837] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:40:30,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:40:30,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 99 [2023-12-18 19:40:30,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399648806] [2023-12-18 19:40:30,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:40:30,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2023-12-18 19:40:30,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:40:30,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2023-12-18 19:40:30,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1243, Invalid=8459, Unknown=0, NotChecked=0, Total=9702 [2023-12-18 19:40:30,132 INFO L87 Difference]: Start difference. First operand 249 states and 262 transitions. Second operand has 99 states, 99 states have (on average 1.3737373737373737) internal successors, (136), 99 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:40:33,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:40:33,366 INFO L93 Difference]: Finished difference Result 562 states and 596 transitions. [2023-12-18 19:40:33,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-12-18 19:40:33,371 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.3737373737373737) internal successors, (136), 99 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2023-12-18 19:40:33,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:40:33,371 INFO L225 Difference]: With dead ends: 562 [2023-12-18 19:40:33,372 INFO L226 Difference]: Without dead ends: 273 [2023-12-18 19:40:33,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 233 SyntacticMatches, 20 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7272 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2546, Invalid=16914, Unknown=0, NotChecked=0, Total=19460 [2023-12-18 19:40:33,373 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 87 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 3801 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 4391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 3801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-18 19:40:33,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 57 Invalid, 4391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 3801 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-18 19:40:33,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-12-18 19:40:33,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 213. [2023-12-18 19:40:33,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0518867924528301) internal successors, (223), 212 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:40:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 223 transitions. [2023-12-18 19:40:33,813 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 223 transitions. Word has length 145 [2023-12-18 19:40:33,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:40:33,813 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 223 transitions. [2023-12-18 19:40:33,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.3737373737373737) internal successors, (136), 99 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:40:33,813 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 223 transitions. [2023-12-18 19:40:33,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-12-18 19:40:33,814 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:40:33,814 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:40:33,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-12-18 19:40:34,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:40:34,014 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:40:34,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:40:34,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1148965628, now seen corresponding path program 52 times [2023-12-18 19:40:34,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:40:34,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247699755] [2023-12-18 19:40:34,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:40:34,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:40:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:40:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 153 proven. 208 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2023-12-18 19:40:34,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:40:34,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247699755] [2023-12-18 19:40:34,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247699755] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:40:34,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758339884] [2023-12-18 19:40:34,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:40:34,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:40:34,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:40:34,844 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:40:34,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-12-18 19:40:35,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:40:35,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:40:35,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-18 19:40:35,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:40:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2023-12-18 19:40:36,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:40:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2023-12-18 19:40:37,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758339884] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:40:37,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:40:37,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 99 [2023-12-18 19:40:37,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615489473] [2023-12-18 19:40:37,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:40:37,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2023-12-18 19:40:37,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:40:37,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2023-12-18 19:40:37,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1261, Invalid=8441, Unknown=0, NotChecked=0, Total=9702 [2023-12-18 19:40:37,279 INFO L87 Difference]: Start difference. First operand 213 states and 223 transitions. Second operand has 99 states, 99 states have (on average 1.3636363636363635) internal successors, (135), 99 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:40:38,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:40:38,460 INFO L93 Difference]: Finished difference Result 302 states and 316 transitions. [2023-12-18 19:40:38,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-18 19:40:38,460 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.3636363636363635) internal successors, (135), 99 states have internal predecessors, (135), 0 states have call successors, (0), 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 146 [2023-12-18 19:40:38,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:40:38,460 INFO L225 Difference]: With dead ends: 302 [2023-12-18 19:40:38,461 INFO L226 Difference]: Without dead ends: 152 [2023-12-18 19:40:38,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 214 SyntacticMatches, 20 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5503 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1871, Invalid=12171, Unknown=0, NotChecked=0, Total=14042 [2023-12-18 19:40:38,463 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 152 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 19:40:38,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 67 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 19:40:38,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-12-18 19:40:38,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2023-12-18 19:40:38,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0463576158940397) internal successors, (158), 151 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:40:38,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 158 transitions. [2023-12-18 19:40:38,815 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 158 transitions. Word has length 146 [2023-12-18 19:40:38,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:40:38,815 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 158 transitions. [2023-12-18 19:40:38,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.3636363636363635) internal successors, (135), 99 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:40:38,815 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 158 transitions. [2023-12-18 19:40:38,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-12-18 19:40:38,816 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:40:38,816 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:40:38,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-12-18 19:40:39,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-12-18 19:40:39,016 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:40:39,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:40:39,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2001737354, now seen corresponding path program 53 times [2023-12-18 19:40:39,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:40:39,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841679027] [2023-12-18 19:40:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:40:39,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:40:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:41:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 120 proven. 1210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:41:25,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:41:25,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841679027] [2023-12-18 19:41:25,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841679027] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:41:25,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742513394] [2023-12-18 19:41:25,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:41:25,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:41:25,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:41:25,902 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:41:25,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-12-18 19:41:27,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-12-18 19:41:27,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:41:27,204 WARN L260 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 516 conjunts are in the unsatisfiable core [2023-12-18 19:41:27,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:41:27,360 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 19:41:27,469 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 19:41:27,580 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 19:41:27,692 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 19:41:27,804 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 19:41:27,914 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 19:41:29,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 1330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 19:41:29,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:41:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 1140 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-18 19:41:40,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742513394] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:41:40,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:41:40,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 63, 43] total 188 [2023-12-18 19:41:40,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961595678] [2023-12-18 19:41:40,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:41:40,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2023-12-18 19:41:40,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:41:40,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2023-12-18 19:41:40,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1194, Invalid=33962, Unknown=0, NotChecked=0, Total=35156 [2023-12-18 19:41:40,968 INFO L87 Difference]: Start difference. First operand 152 states and 158 transitions. Second operand has 188 states, 188 states have (on average 1.9787234042553192) internal successors, (372), 188 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:42:17,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:42:17,608 INFO L93 Difference]: Finished difference Result 419 states and 442 transitions. [2023-12-18 19:42:17,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-12-18 19:42:17,608 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 1.9787234042553192) internal successors, (372), 188 states have internal predecessors, (372), 0 states have call successors, (0), 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 151 [2023-12-18 19:42:17,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:42:17,609 INFO L225 Difference]: With dead ends: 419 [2023-12-18 19:42:17,610 INFO L226 Difference]: Without dead ends: 415 [2023-12-18 19:42:17,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19553 ImplicationChecksByTransitivity, 45.9s TimeCoverageRelationStatistics Valid=5495, Invalid=79477, Unknown=0, NotChecked=0, Total=84972 [2023-12-18 19:42:17,612 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 14368 mSolverCounterSat, 1026 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 15394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1026 IncrementalHoareTripleChecker+Valid, 14368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2023-12-18 19:42:17,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 414 Invalid, 15394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1026 Valid, 14368 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2023-12-18 19:42:17,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2023-12-18 19:42:18,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 261. [2023-12-18 19:42:18,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0538461538461539) internal successors, (274), 260 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:42:18,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 274 transitions. [2023-12-18 19:42:18,197 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 274 transitions. Word has length 151 [2023-12-18 19:42:18,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:42:18,197 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 274 transitions. [2023-12-18 19:42:18,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 1.9787234042553192) internal successors, (372), 188 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:42:18,197 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 274 transitions. [2023-12-18 19:42:18,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-12-18 19:42:18,198 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:42:18,198 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:42:18,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-12-18 19:42:18,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-12-18 19:42:18,398 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:42:18,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:42:18,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1896033077, now seen corresponding path program 54 times [2023-12-18 19:42:18,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:42:18,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820941240] [2023-12-18 19:42:18,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:42:18,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:42:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:42:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 191 proven. 209 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-12-18 19:42:19,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:42:19,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820941240] [2023-12-18 19:42:19,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820941240] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:42:19,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820284051] [2023-12-18 19:42:19,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:42:19,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:42:19,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:42:19,306 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:42:19,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-12-18 19:42:20,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-12-18 19:42:20,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:42:20,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-18 19:42:20,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:42:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-12-18 19:42:21,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:42:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-12-18 19:42:22,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820284051] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:42:22,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:42:22,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 104 [2023-12-18 19:42:22,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248687449] [2023-12-18 19:42:22,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:42:22,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2023-12-18 19:42:22,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:42:22,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2023-12-18 19:42:22,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1368, Invalid=9344, Unknown=0, NotChecked=0, Total=10712 [2023-12-18 19:42:22,856 INFO L87 Difference]: Start difference. First operand 261 states and 274 transitions. Second operand has 104 states, 104 states have (on average 1.3557692307692308) internal successors, (141), 104 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 19:42:27,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:42:27,558 INFO L93 Difference]: Finished difference Result 589 states and 623 transitions. [2023-12-18 19:42:27,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-12-18 19:42:27,559 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.3557692307692308) internal successors, (141), 104 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) Word has length 152 [2023-12-18 19:42:27,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:42:27,560 INFO L225 Difference]: With dead ends: 589 [2023-12-18 19:42:27,560 INFO L226 Difference]: Without dead ends: 286 [2023-12-18 19:42:27,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 244 SyntacticMatches, 21 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8055 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2799, Invalid=18663, Unknown=0, NotChecked=0, Total=21462 [2023-12-18 19:42:27,561 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 5485 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 6174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 5485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:42:27,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 137 Invalid, 6174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [689 Valid, 5485 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-18 19:42:27,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-12-18 19:42:28,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 223. [2023-12-18 19:42:28,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.0495495495495495) internal successors, (233), 222 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:42:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 233 transitions. [2023-12-18 19:42:28,102 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 233 transitions. Word has length 152 [2023-12-18 19:42:28,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:42:28,103 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 233 transitions. [2023-12-18 19:42:28,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.3557692307692308) internal successors, (141), 104 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 19:42:28,103 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 233 transitions. [2023-12-18 19:42:28,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-18 19:42:28,103 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:42:28,103 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:42:28,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-12-18 19:42:28,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:42:28,312 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:42:28,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:42:28,312 INFO L85 PathProgramCache]: Analyzing trace with hash -605570954, now seen corresponding path program 55 times [2023-12-18 19:42:28,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:42:28,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878171981] [2023-12-18 19:42:28,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:42:28,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:42:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:42:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 171 proven. 229 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2023-12-18 19:42:29,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:42:29,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878171981] [2023-12-18 19:42:29,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878171981] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:42:29,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054193637] [2023-12-18 19:42:29,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:42:29,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:42:29,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:42:29,306 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:42:29,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-12-18 19:42:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:42:29,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-18 19:42:29,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:42:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2023-12-18 19:42:30,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:42:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2023-12-18 19:42:30,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054193637] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:42:30,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:42:30,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2023-12-18 19:42:30,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010167203] [2023-12-18 19:42:30,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:42:30,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-12-18 19:42:30,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:42:30,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-12-18 19:42:30,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=969, Invalid=3191, Unknown=0, NotChecked=0, Total=4160 [2023-12-18 19:42:30,662 INFO L87 Difference]: Start difference. First operand 223 states and 233 transitions. Second operand has 65 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 65 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:42:31,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:42:31,606 INFO L93 Difference]: Finished difference Result 316 states and 330 transitions. [2023-12-18 19:42:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-18 19:42:31,607 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 65 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2023-12-18 19:42:31,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:42:31,607 INFO L225 Difference]: With dead ends: 316 [2023-12-18 19:42:31,607 INFO L226 Difference]: Without dead ends: 159 [2023-12-18 19:42:31,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 244 SyntacticMatches, 40 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3173 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=992, Invalid=3298, Unknown=0, NotChecked=0, Total=4290 [2023-12-18 19:42:31,608 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 19:42:31,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 78 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 19:42:31,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-12-18 19:42:32,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2023-12-18 19:42:32,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0443037974683544) internal successors, (165), 158 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:42:32,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 165 transitions. [2023-12-18 19:42:32,220 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 165 transitions. Word has length 153 [2023-12-18 19:42:32,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:42:32,220 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 165 transitions. [2023-12-18 19:42:32,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 65 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 19:42:32,221 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 165 transitions. [2023-12-18 19:42:32,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-18 19:42:32,221 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:42:32,221 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:42:32,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-12-18 19:42:32,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:42:32,422 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:42:32,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:42:32,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1124866592, now seen corresponding path program 56 times [2023-12-18 19:42:32,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:42:32,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612054164] [2023-12-18 19:42:32,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:42:32,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:42:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2023-12-18 19:43:06,271 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 19:43:07,471 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-18 19:43:07,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 [2023-12-18 19:43:07,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2023-12-18 19:43:07,832 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Termination requested (timeout or resource limit) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:304) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:154) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:260) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:237) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:869) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:793) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:352) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:283) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:164) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:327) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:210) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-18 19:43:07,835 INFO L158 Benchmark]: Toolchain (without parser) took 830032.78ms. Allocated memory was 253.8MB in the beginning and 2.5GB in the end (delta: 2.2GB). Free memory was 192.0MB in the beginning and 1.7GB in the end (delta: -1.5GB). Peak memory consumption was 1.9GB. Max. memory is 8.0GB. [2023-12-18 19:43:07,835 INFO L158 Benchmark]: CDTParser took 0.53ms. Allocated memory is still 253.8MB. Free memory is still 205.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 19:43:07,835 INFO L158 Benchmark]: CACSL2BoogieTranslator took 158.20ms. Allocated memory is still 253.8MB. Free memory was 191.7MB in the beginning and 180.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 19:43:07,835 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.38ms. Allocated memory is still 253.8MB. Free memory was 180.3MB in the beginning and 178.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 19:43:07,835 INFO L158 Benchmark]: Boogie Preprocessor took 48.90ms. Allocated memory is still 253.8MB. Free memory was 178.4MB in the beginning and 176.6MB in the end (delta: 1.9MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-18 19:43:07,835 INFO L158 Benchmark]: RCFGBuilder took 290.08ms. Allocated memory was 253.8MB in the beginning and 318.8MB in the end (delta: 65.0MB). Free memory was 176.3MB in the beginning and 275.7MB in the end (delta: -99.4MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. [2023-12-18 19:43:07,835 INFO L158 Benchmark]: TraceAbstraction took 829507.13ms. Allocated memory was 318.8MB in the beginning and 2.5GB in the end (delta: 2.1GB). Free memory was 275.2MB in the beginning and 1.7GB in the end (delta: -1.4GB). Peak memory consumption was 2.0GB. Max. memory is 8.0GB. [2023-12-18 19:43:07,838 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53ms. Allocated memory is still 253.8MB. Free memory is still 205.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 158.20ms. Allocated memory is still 253.8MB. Free memory was 191.7MB in the beginning and 180.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 23.38ms. Allocated memory is still 253.8MB. Free memory was 180.3MB in the beginning and 178.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 48.90ms. Allocated memory is still 253.8MB. Free memory was 178.4MB in the beginning and 176.6MB in the end (delta: 1.9MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 290.08ms. Allocated memory was 253.8MB in the beginning and 318.8MB in the end (delta: 65.0MB). Free memory was 176.3MB in the beginning and 275.7MB in the end (delta: -99.4MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. * TraceAbstraction took 829507.13ms. Allocated memory was 318.8MB in the beginning and 2.5GB in the end (delta: 2.1GB). Free memory was 275.2MB in the beginning and 1.7GB in the end (delta: -1.4GB). Peak memory consumption was 2.0GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Termination requested (timeout or resource limit) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Termination requested (timeout or resource limit): de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:304) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown