/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_sum1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 17:12:36,297 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 17:12:36,371 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 17:12:36,374 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 17:12:36,375 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 17:12:36,396 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 17:12:36,396 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 17:12:36,397 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 17:12:36,397 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 17:12:36,400 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 17:12:36,400 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 17:12:36,401 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 17:12:36,401 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 17:12:36,402 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 17:12:36,403 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 17:12:36,403 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 17:12:36,403 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 17:12:36,403 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 17:12:36,403 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 17:12:36,403 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 17:12:36,404 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 17:12:36,404 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 17:12:36,404 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 17:12:36,404 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 17:12:36,404 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 17:12:36,404 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 17:12:36,405 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 17:12:36,405 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 17:12:36,405 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 17:12:36,405 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 17:12:36,406 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 17:12:36,406 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 17:12:36,406 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 17:12:36,406 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 17:12:36,406 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 17:12:36,407 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 17:12:36,407 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 17:12:36,407 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 17:12:36,407 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 17:12:36,407 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 17:12:36,407 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 17:12:36,407 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 17:12:36,407 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 17:12:36,407 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 17:12:36,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 17:12:36,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 17:12:36,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 17:12:36,628 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 17:12:36,629 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 17:12:36,630 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum1.c [2023-12-15 17:12:37,717 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 17:12:37,851 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 17:12:37,852 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum1.c [2023-12-15 17:12:37,856 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3455860f9/eacd7b0b0f7643c8b52590bc97155ac6/FLAG10ab32a74 [2023-12-15 17:12:37,865 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3455860f9/eacd7b0b0f7643c8b52590bc97155ac6 [2023-12-15 17:12:37,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 17:12:37,868 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 17:12:37,869 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 17:12:37,869 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 17:12:37,872 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 17:12:37,873 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 05:12:37" (1/1) ... [2023-12-15 17:12:37,873 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46b736d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:12:37, skipping insertion in model container [2023-12-15 17:12:37,873 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 05:12:37" (1/1) ... [2023-12-15 17:12:37,887 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 17:12:37,972 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_sum1.c[400,413] [2023-12-15 17:12:37,980 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 17:12:37,986 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 17:12:37,993 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum1.c[400,413] [2023-12-15 17:12:37,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 17:12:38,005 INFO L206 MainTranslator]: Completed translation [2023-12-15 17:12:38,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:12:38 WrapperNode [2023-12-15 17:12:38,006 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 17:12:38,007 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 17:12:38,007 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 17:12:38,007 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 17:12:38,012 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:12:38" (1/1) ... [2023-12-15 17:12:38,017 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:12:38" (1/1) ... [2023-12-15 17:12:38,031 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-12-15 17:12:38,032 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 17:12:38,032 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 17:12:38,032 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 17:12:38,032 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 17:12:38,038 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:12:38" (1/1) ... [2023-12-15 17:12:38,039 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:12:38" (1/1) ... [2023-12-15 17:12:38,040 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:12:38" (1/1) ... [2023-12-15 17:12:38,048 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-12-15 17:12:38,048 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:12:38" (1/1) ... [2023-12-15 17:12:38,048 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:12:38" (1/1) ... [2023-12-15 17:12:38,057 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:12:38" (1/1) ... [2023-12-15 17:12:38,059 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:12:38" (1/1) ... [2023-12-15 17:12:38,060 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:12:38" (1/1) ... [2023-12-15 17:12:38,061 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:12:38" (1/1) ... [2023-12-15 17:12:38,062 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 17:12:38,062 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 17:12:38,062 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 17:12:38,063 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 17:12:38,063 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:12:38" (1/1) ... [2023-12-15 17:12:38,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 17:12:38,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:12:38,095 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) [2023-12-15 17:12:38,116 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 [2023-12-15 17:12:38,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 17:12:38,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 17:12:38,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-15 17:12:38,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-15 17:12:38,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-15 17:12:38,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-15 17:12:38,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 17:12:38,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 17:12:38,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-15 17:12:38,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-15 17:12:38,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-15 17:12:38,171 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 17:12:38,173 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 17:12:38,262 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 17:12:38,284 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 17:12:38,284 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-15 17:12:38,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 05:12:38 BoogieIcfgContainer [2023-12-15 17:12:38,284 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 17:12:38,286 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 17:12:38,286 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 17:12:38,288 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 17:12:38,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 05:12:37" (1/3) ... [2023-12-15 17:12:38,288 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b06883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 05:12:38, skipping insertion in model container [2023-12-15 17:12:38,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:12:38" (2/3) ... [2023-12-15 17:12:38,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b06883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 05:12:38, skipping insertion in model container [2023-12-15 17:12:38,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 05:12:38" (3/3) ... [2023-12-15 17:12:38,289 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum1.c [2023-12-15 17:12:38,301 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 17:12:38,301 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 17:12:38,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 17:12:38,334 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;@61396e71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 17:12:38,335 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 17:12:38,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:38,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-15 17:12:38,341 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:38,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:38,341 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:38,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:38,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1762294231, now seen corresponding path program 1 times [2023-12-15 17:12:38,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:38,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264955857] [2023-12-15 17:12:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:38,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:12:38,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:38,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264955857] [2023-12-15 17:12:38,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264955857] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 17:12:38,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 17:12:38,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 17:12:38,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893956066] [2023-12-15 17:12:38,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 17:12:38,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 17:12:38,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:38,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 17:12:38,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 17:12:38,495 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:38,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:12:38,532 INFO L93 Difference]: Finished difference Result 25 states and 36 transitions. [2023-12-15 17:12:38,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 17:12:38,533 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-12-15 17:12:38,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:12:38,538 INFO L225 Difference]: With dead ends: 25 [2023-12-15 17:12:38,538 INFO L226 Difference]: Without dead ends: 11 [2023-12-15 17:12:38,540 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 [2023-12-15 17:12:38,544 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:12:38,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:12:38,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-12-15 17:12:38,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-12-15 17:12:38,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-12-15 17:12:38,565 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 10 [2023-12-15 17:12:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:12:38,565 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-12-15 17:12:38,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-12-15 17:12:38,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-15 17:12:38,566 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:38,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:38,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 17:12:38,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:38,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:38,567 INFO L85 PathProgramCache]: Analyzing trace with hash -104633187, now seen corresponding path program 1 times [2023-12-15 17:12:38,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:38,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497698399] [2023-12-15 17:12:38,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:38,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:12:38,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:38,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497698399] [2023-12-15 17:12:38,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497698399] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 17:12:38,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 17:12:38,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 17:12:38,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230356943] [2023-12-15 17:12:38,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 17:12:38,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 17:12:38,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:38,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 17:12:38,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 17:12:38,699 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:12:38,722 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-12-15 17:12:38,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 17:12:38,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-12-15 17:12:38,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:12:38,723 INFO L225 Difference]: With dead ends: 20 [2023-12-15 17:12:38,723 INFO L226 Difference]: Without dead ends: 12 [2023-12-15 17:12:38,723 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 [2023-12-15 17:12:38,724 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:12:38,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:12:38,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-12-15 17:12:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-12-15 17:12:38,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-12-15 17:12:38,727 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2023-12-15 17:12:38,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:12:38,727 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-12-15 17:12:38,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:38,727 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-12-15 17:12:38,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-15 17:12:38,727 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:38,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:38,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-15 17:12:38,728 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:38,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:38,728 INFO L85 PathProgramCache]: Analyzing trace with hash -536743555, now seen corresponding path program 1 times [2023-12-15 17:12:38,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:38,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439906591] [2023-12-15 17:12:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:38,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 17:12:38,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:38,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439906591] [2023-12-15 17:12:38,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439906591] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 17:12:38,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 17:12:38,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 17:12:38,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714624569] [2023-12-15 17:12:38,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 17:12:38,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 17:12:38,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 17:12:38,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 17:12:38,796 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:38,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:12:38,814 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-12-15 17:12:38,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 17:12:38,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-12-15 17:12:38,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:12:38,815 INFO L225 Difference]: With dead ends: 20 [2023-12-15 17:12:38,815 INFO L226 Difference]: Without dead ends: 14 [2023-12-15 17:12:38,816 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 [2023-12-15 17:12:38,816 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:12:38,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 9 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:12:38,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-12-15 17:12:38,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-12-15 17:12:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:38,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-12-15 17:12:38,820 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2023-12-15 17:12:38,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:12:38,820 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-12-15 17:12:38,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-12-15 17:12:38,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-15 17:12:38,820 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:38,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:38,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-15 17:12:38,821 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:38,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:38,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1915649104, now seen corresponding path program 1 times [2023-12-15 17:12:38,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:38,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450213628] [2023-12-15 17:12:38,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:38,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 17:12:38,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:38,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450213628] [2023-12-15 17:12:38,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450213628] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:12:38,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383749069] [2023-12-15 17:12:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:38,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:12:38,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:12:38,946 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) [2023-12-15 17:12:38,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 17:12:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:39,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 17:12:39,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:12:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 17:12:39,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:12:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 17:12:39,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383749069] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:12:39,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:12:39,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-15 17:12:39,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8013452] [2023-12-15 17:12:39,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:12:39,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 17:12:39,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:39,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 17:12:39,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-15 17:12:39,105 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2023-12-15 17:12:39,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:12:39,132 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-12-15 17:12:39,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 17:12:39,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 13 [2023-12-15 17:12:39,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:12:39,134 INFO L225 Difference]: With dead ends: 25 [2023-12-15 17:12:39,134 INFO L226 Difference]: Without dead ends: 15 [2023-12-15 17:12:39,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-15 17:12:39,138 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:12:39,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:12:39,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-15 17:12:39,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-12-15 17:12:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:39,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-12-15 17:12:39,141 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 13 [2023-12-15 17:12:39,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:12:39,141 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-12-15 17:12:39,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2023-12-15 17:12:39,142 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-12-15 17:12:39,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-15 17:12:39,142 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:39,142 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:39,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 17:12:39,346 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 [2023-12-15 17:12:39,348 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:39,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:39,348 INFO L85 PathProgramCache]: Analyzing trace with hash 932662128, now seen corresponding path program 2 times [2023-12-15 17:12:39,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:39,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460005570] [2023-12-15 17:12:39,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:39,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 17:12:39,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:39,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460005570] [2023-12-15 17:12:39,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460005570] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:12:39,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196776348] [2023-12-15 17:12:39,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 17:12:39,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:12:39,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:12:39,461 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) [2023-12-15 17:12:39,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 17:12:39,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 17:12:39,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:12:39,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 17:12:39,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:12:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 17:12:39,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:12:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 17:12:39,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196776348] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:12:39,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:12:39,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-12-15 17:12:39,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206135914] [2023-12-15 17:12:39,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:12:39,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 17:12:39,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:39,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 17:12:39,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-15 17:12:39,589 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2023-12-15 17:12:39,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:12:39,622 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2023-12-15 17:12:39,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 17:12:39,622 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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 14 [2023-12-15 17:12:39,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:12:39,624 INFO L225 Difference]: With dead ends: 24 [2023-12-15 17:12:39,624 INFO L226 Difference]: Without dead ends: 17 [2023-12-15 17:12:39,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-15 17:12:39,625 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:12:39,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:12:39,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-15 17:12:39,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-15 17:12:39,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 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) [2023-12-15 17:12:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-12-15 17:12:39,633 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2023-12-15 17:12:39,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:12:39,633 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-12-15 17:12:39,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2023-12-15 17:12:39,634 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-12-15 17:12:39,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-15 17:12:39,635 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:39,637 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:39,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 17:12:39,842 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 [2023-12-15 17:12:39,847 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:39,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:39,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1849724483, now seen corresponding path program 3 times [2023-12-15 17:12:39,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:39,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166336895] [2023-12-15 17:12:39,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:39,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:12:40,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:40,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166336895] [2023-12-15 17:12:40,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166336895] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:12:40,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290313684] [2023-12-15 17:12:40,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 17:12:40,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:12:40,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:12:40,389 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) [2023-12-15 17:12:40,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 17:12:40,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-15 17:12:40,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:12:40,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-15 17:12:40,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:12:40,477 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 [2023-12-15 17:12:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:12:40,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:12:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 17:12:40,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290313684] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:12:40,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:12:40,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 18 [2023-12-15 17:12:40,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669877222] [2023-12-15 17:12:40,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:12:40,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-15 17:12:40,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:40,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-15 17:12:40,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-12-15 17:12:40,612 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:40,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:12:40,709 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-12-15 17:12:40,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-15 17:12:40,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-15 17:12:40,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:12:40,710 INFO L225 Difference]: With dead ends: 26 [2023-12-15 17:12:40,710 INFO L226 Difference]: Without dead ends: 22 [2023-12-15 17:12:40,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-12-15 17:12:40,711 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:12:40,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 62 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:12:40,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-15 17:12:40,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-12-15 17:12:40,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:40,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-12-15 17:12:40,714 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 16 [2023-12-15 17:12:40,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:12:40,714 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-12-15 17:12:40,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:40,715 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-12-15 17:12:40,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-15 17:12:40,715 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:40,715 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:40,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-15 17:12:40,919 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 [2023-12-15 17:12:40,919 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:40,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:40,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1475451016, now seen corresponding path program 4 times [2023-12-15 17:12:40,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:40,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352276951] [2023-12-15 17:12:40,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:40,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 17:12:40,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:40,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352276951] [2023-12-15 17:12:40,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352276951] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:12:40,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611454056] [2023-12-15 17:12:40,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 17:12:40,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:12:40,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:12:40,977 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) [2023-12-15 17:12:41,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 17:12:41,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 17:12:41,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:12:41,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 17:12:41,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:12:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 17:12:41,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:12:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 17:12:41,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611454056] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:12:41,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:12:41,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-12-15 17:12:41,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869210769] [2023-12-15 17:12:41,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:12:41,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-15 17:12:41,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:41,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-15 17:12:41,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-12-15 17:12:41,145 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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) [2023-12-15 17:12:41,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:12:41,268 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-12-15 17:12:41,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-15 17:12:41,268 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-15 17:12:41,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:12:41,268 INFO L225 Difference]: With dead ends: 41 [2023-12-15 17:12:41,268 INFO L226 Difference]: Without dead ends: 24 [2023-12-15 17:12:41,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2023-12-15 17:12:41,269 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:12:41,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 31 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:12:41,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-15 17:12:41,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2023-12-15 17:12:41,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-12-15 17:12:41,273 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 17 [2023-12-15 17:12:41,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:12:41,273 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-12-15 17:12:41,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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) [2023-12-15 17:12:41,273 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-12-15 17:12:41,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-15 17:12:41,273 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:41,273 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:41,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 17:12:41,477 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 [2023-12-15 17:12:41,478 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:41,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:41,478 INFO L85 PathProgramCache]: Analyzing trace with hash -537919397, now seen corresponding path program 5 times [2023-12-15 17:12:41,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:41,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324964283] [2023-12-15 17:12:41,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:41,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:41,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:12:41,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:41,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324964283] [2023-12-15 17:12:41,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324964283] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:12:41,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618992486] [2023-12-15 17:12:41,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 17:12:41,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:12:41,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:12:41,536 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) [2023-12-15 17:12:41,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 17:12:41,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-15 17:12:41,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:12:41,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 17:12:41,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:12:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:12:41,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:12:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:12:41,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618992486] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:12:41,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:12:41,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-15 17:12:41,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155446956] [2023-12-15 17:12:41,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:12:41,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-15 17:12:41,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:41,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-15 17:12:41,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-12-15 17:12:41,659 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:41,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:12:41,692 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-12-15 17:12:41,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-15 17:12:41,693 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-15 17:12:41,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:12:41,693 INFO L225 Difference]: With dead ends: 29 [2023-12-15 17:12:41,693 INFO L226 Difference]: Without dead ends: 20 [2023-12-15 17:12:41,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-12-15 17:12:41,694 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:12:41,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:12:41,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-15 17:12:41,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-15 17:12:41,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:41,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-12-15 17:12:41,697 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 18 [2023-12-15 17:12:41,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:12:41,697 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-12-15 17:12:41,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:41,697 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-12-15 17:12:41,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-15 17:12:41,698 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:41,698 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:41,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-15 17:12:41,902 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 [2023-12-15 17:12:41,902 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:41,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:41,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1966217392, now seen corresponding path program 6 times [2023-12-15 17:12:41,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:41,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246657108] [2023-12-15 17:12:41,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:41,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:12:42,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:42,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246657108] [2023-12-15 17:12:42,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246657108] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:12:42,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867055442] [2023-12-15 17:12:42,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 17:12:42,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:12:42,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:12:42,443 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) [2023-12-15 17:12:42,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 17:12:42,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-12-15 17:12:42,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:12:42,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-15 17:12:42,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:12:42,512 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 [2023-12-15 17:12:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:12:42,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:12:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:12:42,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867055442] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:12:42,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:12:42,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 11] total 30 [2023-12-15 17:12:42,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501030643] [2023-12-15 17:12:42,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:12:42,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-15 17:12:42,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:42,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-15 17:12:42,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2023-12-15 17:12:42,846 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2023-12-15 17:12:43,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:12:43,074 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2023-12-15 17:12:43,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 17:12:43,075 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 19 [2023-12-15 17:12:43,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:12:43,075 INFO L225 Difference]: With dead ends: 30 [2023-12-15 17:12:43,075 INFO L226 Difference]: Without dead ends: 26 [2023-12-15 17:12:43,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2023-12-15 17:12:43,076 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:12:43,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:12:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-15 17:12:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-12-15 17:12:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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) [2023-12-15 17:12:43,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-12-15 17:12:43,081 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2023-12-15 17:12:43,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:12:43,081 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-12-15 17:12:43,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2023-12-15 17:12:43,082 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-12-15 17:12:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-15 17:12:43,082 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:43,082 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:43,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 17:12:43,286 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 [2023-12-15 17:12:43,286 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:43,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:43,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2009920773, now seen corresponding path program 7 times [2023-12-15 17:12:43,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:43,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654308121] [2023-12-15 17:12:43,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:43,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:12:43,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:43,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654308121] [2023-12-15 17:12:43,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654308121] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:12:43,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928890376] [2023-12-15 17:12:43,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-15 17:12:43,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:12:43,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:12:43,363 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) [2023-12-15 17:12:43,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 17:12:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:43,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 17:12:43,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:12:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:12:43,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:12:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:12:43,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928890376] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:12:43,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:12:43,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-15 17:12:43,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928827672] [2023-12-15 17:12:43,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:12:43,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-15 17:12:43,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:43,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-15 17:12:43,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-12-15 17:12:43,512 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:43,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:12:43,568 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2023-12-15 17:12:43,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-15 17:12:43,568 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-15 17:12:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:12:43,569 INFO L225 Difference]: With dead ends: 44 [2023-12-15 17:12:43,569 INFO L226 Difference]: Without dead ends: 24 [2023-12-15 17:12:43,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-12-15 17:12:43,569 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:12:43,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:12:43,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-15 17:12:43,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-15 17:12:43,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-12-15 17:12:43,573 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 20 [2023-12-15 17:12:43,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:12:43,573 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-12-15 17:12:43,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:43,573 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-12-15 17:12:43,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-15 17:12:43,574 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:43,574 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:43,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 17:12:43,778 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 [2023-12-15 17:12:43,778 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:43,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:43,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1832450011, now seen corresponding path program 8 times [2023-12-15 17:12:43,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:43,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259147936] [2023-12-15 17:12:43,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:43,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 17:12:43,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:43,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259147936] [2023-12-15 17:12:43,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259147936] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:12:43,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933110828] [2023-12-15 17:12:43,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 17:12:43,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:12:43,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:12:43,858 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) [2023-12-15 17:12:43,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 17:12:43,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 17:12:43,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:12:43,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 17:12:43,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:12:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 17:12:43,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:12:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 17:12:44,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933110828] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:12:44,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:12:44,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-15 17:12:44,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552617680] [2023-12-15 17:12:44,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:12:44,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-15 17:12:44,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:44,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-15 17:12:44,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-15 17:12:44,026 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:44,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:12:44,086 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-12-15 17:12:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-15 17:12:44,086 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-15 17:12:44,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:12:44,086 INFO L225 Difference]: With dead ends: 33 [2023-12-15 17:12:44,086 INFO L226 Difference]: Without dead ends: 23 [2023-12-15 17:12:44,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-12-15 17:12:44,087 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:12:44,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 37 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:12:44,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-15 17:12:44,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-15 17:12:44,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 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) [2023-12-15 17:12:44,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-12-15 17:12:44,090 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 21 [2023-12-15 17:12:44,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:12:44,090 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-12-15 17:12:44,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:44,090 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-12-15 17:12:44,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-15 17:12:44,091 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:44,091 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:44,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-15 17:12:44,295 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 [2023-12-15 17:12:44,295 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:44,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:44,295 INFO L85 PathProgramCache]: Analyzing trace with hash 997916381, now seen corresponding path program 9 times [2023-12-15 17:12:44,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:44,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000792282] [2023-12-15 17:12:44,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:44,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:12:44,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:44,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000792282] [2023-12-15 17:12:44,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000792282] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:12:44,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292672528] [2023-12-15 17:12:44,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 17:12:44,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:12:44,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:12:44,866 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) [2023-12-15 17:12:44,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 17:12:44,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-15 17:12:44,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:12:44,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2023-12-15 17:12:44,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:12:44,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-15 17:12:45,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 17:12:45,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 17:12:45,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-12-15 17:12:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:12:45,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:12:45,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2023-12-15 17:12:45,860 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 17:12:45,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2023-12-15 17:12:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:12:45,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292672528] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:12:45,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:12:45,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 50 [2023-12-15 17:12:45,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049308660] [2023-12-15 17:12:45,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:12:45,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-15 17:12:45,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:45,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-15 17:12:45,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2232, Unknown=0, NotChecked=0, Total=2450 [2023-12-15 17:12:45,985 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 50 states, 50 states have (on average 1.12) internal successors, (56), 50 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:46,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:12:46,818 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-12-15 17:12:46,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-15 17:12:46,827 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 50 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-15 17:12:46,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:12:46,828 INFO L225 Difference]: With dead ends: 49 [2023-12-15 17:12:46,828 INFO L226 Difference]: Without dead ends: 43 [2023-12-15 17:12:46,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=375, Invalid=3785, Unknown=0, NotChecked=0, Total=4160 [2023-12-15 17:12:46,829 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 17:12:46,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 81 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 17:12:46,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-15 17:12:46,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2023-12-15 17:12:46,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:46,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-12-15 17:12:46,834 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 22 [2023-12-15 17:12:46,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:12:46,834 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-12-15 17:12:46,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 50 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:46,835 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-12-15 17:12:46,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-15 17:12:46,835 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:46,835 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:46,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-15 17:12:47,039 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 [2023-12-15 17:12:47,039 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:47,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:47,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1852895192, now seen corresponding path program 10 times [2023-12-15 17:12:47,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:47,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458665448] [2023-12-15 17:12:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:47,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 17:12:47,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:47,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458665448] [2023-12-15 17:12:47,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458665448] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:12:47,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777337965] [2023-12-15 17:12:47,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 17:12:47,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:12:47,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:12:47,125 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) [2023-12-15 17:12:47,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-15 17:12:47,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 17:12:47,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:12:47,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 17:12:47,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:12:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 17:12:47,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:12:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 17:12:47,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777337965] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:12:47,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:12:47,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2023-12-15 17:12:47,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920276912] [2023-12-15 17:12:47,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:12:47,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-15 17:12:47,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:47,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-15 17:12:47,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-12-15 17:12:47,394 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:12:47,600 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2023-12-15 17:12:47,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-15 17:12:47,600 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-15 17:12:47,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:12:47,602 INFO L225 Difference]: With dead ends: 55 [2023-12-15 17:12:47,602 INFO L226 Difference]: Without dead ends: 32 [2023-12-15 17:12:47,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=1458, Unknown=0, NotChecked=0, Total=1722 [2023-12-15 17:12:47,604 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:12:47,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 31 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:12:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-15 17:12:47,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2023-12-15 17:12:47,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:47,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-12-15 17:12:47,612 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 23 [2023-12-15 17:12:47,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:12:47,612 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-12-15 17:12:47,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:47,612 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-12-15 17:12:47,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-15 17:12:47,612 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:47,613 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:47,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-15 17:12:47,816 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 [2023-12-15 17:12:47,817 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:47,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:47,817 INFO L85 PathProgramCache]: Analyzing trace with hash -503169221, now seen corresponding path program 11 times [2023-12-15 17:12:47,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:47,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702707499] [2023-12-15 17:12:47,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:47,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-15 17:12:47,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:47,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702707499] [2023-12-15 17:12:47,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702707499] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:12:47,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958516674] [2023-12-15 17:12:47,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 17:12:47,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:12:47,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:12:47,917 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) [2023-12-15 17:12:47,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-15 17:12:47,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-15 17:12:47,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:12:47,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 17:12:47,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:12:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-15 17:12:48,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:12:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-15 17:12:48,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958516674] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:12:48,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:12:48,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2023-12-15 17:12:48,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776455905] [2023-12-15 17:12:48,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:12:48,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-15 17:12:48,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:48,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-15 17:12:48,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2023-12-15 17:12:48,233 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 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) [2023-12-15 17:12:48,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:12:48,367 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2023-12-15 17:12:48,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-15 17:12:48,368 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 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 24 [2023-12-15 17:12:48,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:12:48,368 INFO L225 Difference]: With dead ends: 37 [2023-12-15 17:12:48,368 INFO L226 Difference]: Without dead ends: 26 [2023-12-15 17:12:48,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2023-12-15 17:12:48,369 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:12:48,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 50 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:12:48,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-15 17:12:48,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-15 17:12:48,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-12-15 17:12:48,389 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 24 [2023-12-15 17:12:48,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:12:48,389 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-12-15 17:12:48,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 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) [2023-12-15 17:12:48,390 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-12-15 17:12:48,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-15 17:12:48,390 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:48,390 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:48,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-15 17:12:48,594 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 [2023-12-15 17:12:48,594 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:48,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:48,595 INFO L85 PathProgramCache]: Analyzing trace with hash -2039714544, now seen corresponding path program 12 times [2023-12-15 17:12:48,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:48,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887826940] [2023-12-15 17:12:48,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:48,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:12:49,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:49,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887826940] [2023-12-15 17:12:49,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887826940] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:12:49,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987097270] [2023-12-15 17:12:49,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 17:12:49,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:12:49,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:12:49,347 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) [2023-12-15 17:12:49,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-15 17:12:49,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-15 17:12:49,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:12:49,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-15 17:12:49,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:12:49,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 17:12:49,838 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 [2023-12-15 17:12:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 17:12:49,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:12:50,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 17:12:50,466 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 69 treesize of output 153 [2023-12-15 17:12:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 17:12:50,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987097270] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:12:50,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:12:50,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 18] total 52 [2023-12-15 17:12:50,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091425849] [2023-12-15 17:12:50,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:12:50,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-15 17:12:50,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:50,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-15 17:12:50,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2466, Unknown=0, NotChecked=0, Total=2652 [2023-12-15 17:12:50,969 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 52 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 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) [2023-12-15 17:12:51,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:12:51,811 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2023-12-15 17:12:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-15 17:12:51,812 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 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 25 [2023-12-15 17:12:51,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:12:51,812 INFO L225 Difference]: With dead ends: 38 [2023-12-15 17:12:51,813 INFO L226 Difference]: Without dead ends: 34 [2023-12-15 17:12:51,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=355, Invalid=4757, Unknown=0, NotChecked=0, Total=5112 [2023-12-15 17:12:51,815 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 17:12:51,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 85 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 17:12:51,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-15 17:12:51,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2023-12-15 17:12:51,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 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) [2023-12-15 17:12:51,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-12-15 17:12:51,829 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2023-12-15 17:12:51,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:12:51,830 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-12-15 17:12:51,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 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) [2023-12-15 17:12:51,830 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-12-15 17:12:51,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-15 17:12:51,830 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:51,830 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:51,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-15 17:12:52,034 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 [2023-12-15 17:12:52,035 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:52,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:52,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1866987995, now seen corresponding path program 13 times [2023-12-15 17:12:52,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:52,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11997623] [2023-12-15 17:12:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:52,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-15 17:12:52,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:52,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11997623] [2023-12-15 17:12:52,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11997623] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:12:52,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318847692] [2023-12-15 17:12:52,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-15 17:12:52,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:12:52,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:12:52,146 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) [2023-12-15 17:12:52,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-15 17:12:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:52,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-15 17:12:52,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:12:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-15 17:12:52,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:12:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-15 17:12:52,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318847692] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:12:52,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:12:52,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-15 17:12:52,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927066318] [2023-12-15 17:12:52,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:12:52,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-15 17:12:52,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:52,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-15 17:12:52,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2023-12-15 17:12:52,390 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2023-12-15 17:12:52,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:12:52,480 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2023-12-15 17:12:52,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-15 17:12:52,481 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-15 17:12:52,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:12:52,481 INFO L225 Difference]: With dead ends: 56 [2023-12-15 17:12:52,481 INFO L226 Difference]: Without dead ends: 30 [2023-12-15 17:12:52,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2023-12-15 17:12:52,482 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:12:52,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:12:52,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-15 17:12:52,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-12-15 17:12:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 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) [2023-12-15 17:12:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-12-15 17:12:52,508 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 26 [2023-12-15 17:12:52,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:12:52,508 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-12-15 17:12:52,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2023-12-15 17:12:52,508 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-12-15 17:12:52,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-15 17:12:52,509 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:52,509 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:52,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-15 17:12:52,710 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 [2023-12-15 17:12:52,710 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:52,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:52,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1151385275, now seen corresponding path program 14 times [2023-12-15 17:12:52,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:52,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129102796] [2023-12-15 17:12:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:52,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-15 17:12:52,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:52,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129102796] [2023-12-15 17:12:52,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129102796] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:12:52,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397118446] [2023-12-15 17:12:52,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 17:12:52,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:12:52,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:12:52,865 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) [2023-12-15 17:12:52,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-15 17:12:52,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 17:12:52,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:12:52,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-15 17:12:52,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:12:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-15 17:12:53,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:12:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-15 17:12:53,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397118446] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:12:53,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:12:53,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-15 17:12:53,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13285377] [2023-12-15 17:12:53,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:12:53,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-15 17:12:53,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:53,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-15 17:12:53,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2023-12-15 17:12:53,102 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2023-12-15 17:12:53,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:12:53,178 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2023-12-15 17:12:53,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-15 17:12:53,178 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-15 17:12:53,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:12:53,178 INFO L225 Difference]: With dead ends: 41 [2023-12-15 17:12:53,178 INFO L226 Difference]: Without dead ends: 29 [2023-12-15 17:12:53,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2023-12-15 17:12:53,179 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:12:53,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 42 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:12:53,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-15 17:12:53,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-12-15 17:12:53,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-12-15 17:12:53,189 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2023-12-15 17:12:53,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:12:53,189 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-12-15 17:12:53,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2023-12-15 17:12:53,189 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-12-15 17:12:53,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-15 17:12:53,190 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:53,190 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:53,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-15 17:12:53,395 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 [2023-12-15 17:12:53,395 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:53,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:53,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1359746045, now seen corresponding path program 15 times [2023-12-15 17:12:53,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:53,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38070320] [2023-12-15 17:12:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:53,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:12:54,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:54,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38070320] [2023-12-15 17:12:54,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38070320] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:12:54,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806610644] [2023-12-15 17:12:54,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 17:12:54,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:12:54,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:12:54,382 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) [2023-12-15 17:12:54,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-15 17:12:54,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-15 17:12:54,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:12:54,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 76 conjunts are in the unsatisfiable core [2023-12-15 17:12:54,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:12:55,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 17:12:55,833 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 17:12:55,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-12-15 17:12:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:12:55,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:12:56,603 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 17:12:56,603 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 69 treesize of output 153 [2023-12-15 17:12:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-15 17:12:57,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806610644] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:12:57,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:12:57,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27, 20] total 59 [2023-12-15 17:12:57,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65522221] [2023-12-15 17:12:57,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:12:57,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-12-15 17:12:57,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:57,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-12-15 17:12:57,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=3111, Unknown=1, NotChecked=0, Total=3422 [2023-12-15 17:12:57,025 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 59 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:58,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:12:58,585 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2023-12-15 17:12:58,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-15 17:12:58,585 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-15 17:12:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:12:58,586 INFO L225 Difference]: With dead ends: 61 [2023-12-15 17:12:58,586 INFO L226 Difference]: Without dead ends: 55 [2023-12-15 17:12:58,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=601, Invalid=6204, Unknown=1, NotChecked=0, Total=6806 [2023-12-15 17:12:58,587 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 17:12:58,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 106 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 17:12:58,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-15 17:12:58,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2023-12-15 17:12:58,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-12-15 17:12:58,597 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 28 [2023-12-15 17:12:58,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:12:58,598 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-12-15 17:12:58,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:58,598 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-12-15 17:12:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-15 17:12:58,601 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:58,601 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:58,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-15 17:12:58,805 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 [2023-12-15 17:12:58,806 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:58,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:58,806 INFO L85 PathProgramCache]: Analyzing trace with hash 2108870600, now seen corresponding path program 16 times [2023-12-15 17:12:58,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:58,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600460026] [2023-12-15 17:12:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:58,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-15 17:12:58,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:58,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600460026] [2023-12-15 17:12:58,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600460026] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:12:58,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231093319] [2023-12-15 17:12:58,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 17:12:58,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:12:58,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:12:58,951 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) [2023-12-15 17:12:58,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-15 17:12:59,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 17:12:59,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:12:59,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-15 17:12:59,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:12:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-15 17:12:59,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:12:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-15 17:12:59,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231093319] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:12:59,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:12:59,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2023-12-15 17:12:59,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660112816] [2023-12-15 17:12:59,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:12:59,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-15 17:12:59,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:12:59,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-15 17:12:59,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2023-12-15 17:12:59,353 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:59,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:12:59,647 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2023-12-15 17:12:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-15 17:12:59,647 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-15 17:12:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:12:59,648 INFO L225 Difference]: With dead ends: 69 [2023-12-15 17:12:59,648 INFO L226 Difference]: Without dead ends: 40 [2023-12-15 17:12:59,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=446, Invalid=2634, Unknown=0, NotChecked=0, Total=3080 [2023-12-15 17:12:59,649 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:12:59,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 48 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:12:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-15 17:12:59,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2023-12-15 17:12:59,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 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) [2023-12-15 17:12:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2023-12-15 17:12:59,662 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 29 [2023-12-15 17:12:59,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:12:59,662 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2023-12-15 17:12:59,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:12:59,662 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2023-12-15 17:12:59,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-15 17:12:59,663 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:12:59,663 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:12:59,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-15 17:12:59,868 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 [2023-12-15 17:12:59,868 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:12:59,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:12:59,869 INFO L85 PathProgramCache]: Analyzing trace with hash 926021147, now seen corresponding path program 17 times [2023-12-15 17:12:59,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:12:59,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274309415] [2023-12-15 17:12:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:12:59,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:12:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:12:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-15 17:12:59,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:12:59,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274309415] [2023-12-15 17:12:59,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274309415] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:12:59,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586901706] [2023-12-15 17:12:59,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 17:12:59,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:12:59,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:12:59,999 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) [2023-12-15 17:13:00,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-15 17:13:00,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-15 17:13:00,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:00,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-15 17:13:00,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-15 17:13:00,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-15 17:13:00,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586901706] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:00,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:00,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-12-15 17:13:00,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638853946] [2023-12-15 17:13:00,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:00,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-15 17:13:00,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:00,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-15 17:13:00,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2023-12-15 17:13:00,280 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2023-12-15 17:13:00,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:00,344 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2023-12-15 17:13:00,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-15 17:13:00,344 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 30 [2023-12-15 17:13:00,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:00,345 INFO L225 Difference]: With dead ends: 45 [2023-12-15 17:13:00,345 INFO L226 Difference]: Without dead ends: 32 [2023-12-15 17:13:00,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2023-12-15 17:13:00,346 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:00,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 30 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:13:00,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-15 17:13:00,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-12-15 17:13:00,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:00,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-12-15 17:13:00,360 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 30 [2023-12-15 17:13:00,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:00,361 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-12-15 17:13:00,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2023-12-15 17:13:00,361 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-12-15 17:13:00,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-15 17:13:00,361 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:00,361 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:00,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:00,565 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 [2023-12-15 17:13:00,566 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:00,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:00,566 INFO L85 PathProgramCache]: Analyzing trace with hash 2045213040, now seen corresponding path program 18 times [2023-12-15 17:13:00,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:00,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195887318] [2023-12-15 17:13:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:00,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:01,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:01,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195887318] [2023-12-15 17:13:01,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195887318] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:01,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671341909] [2023-12-15 17:13:01,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 17:13:01,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:01,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:01,624 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) [2023-12-15 17:13:01,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-15 17:13:01,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-15 17:13:01,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:01,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 87 conjunts are in the unsatisfiable core [2023-12-15 17:13:01,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:01,757 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 [2023-12-15 17:13:02,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 17:13:02,520 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 [2023-12-15 17:13:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:02,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:03,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 84 [2023-12-15 17:13:03,775 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 17:13:03,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 922 treesize of output 474 [2023-12-15 17:13:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:04,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671341909] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:04,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:04,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30, 30] total 75 [2023-12-15 17:13:04,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486685154] [2023-12-15 17:13:04,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:04,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-12-15 17:13:04,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:04,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-12-15 17:13:04,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=5156, Unknown=0, NotChecked=0, Total=5550 [2023-12-15 17:13:04,443 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 75 states, 75 states have (on average 1.08) internal successors, (81), 75 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) [2023-12-15 17:13:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:06,664 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2023-12-15 17:13:06,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-12-15 17:13:06,665 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 75 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 31 [2023-12-15 17:13:06,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:06,665 INFO L225 Difference]: With dead ends: 67 [2023-12-15 17:13:06,665 INFO L226 Difference]: Without dead ends: 61 [2023-12-15 17:13:06,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=714, Invalid=9588, Unknown=0, NotChecked=0, Total=10302 [2023-12-15 17:13:06,667 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:06,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 93 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-15 17:13:06,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-15 17:13:06,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2023-12-15 17:13:06,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:06,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2023-12-15 17:13:06,682 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 31 [2023-12-15 17:13:06,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:06,682 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2023-12-15 17:13:06,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 75 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) [2023-12-15 17:13:06,683 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2023-12-15 17:13:06,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-15 17:13:06,683 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:06,683 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:06,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:06,884 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 [2023-12-15 17:13:06,885 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:06,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:06,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1914543941, now seen corresponding path program 19 times [2023-12-15 17:13:06,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:06,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213570317] [2023-12-15 17:13:06,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:06,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-15 17:13:07,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:07,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213570317] [2023-12-15 17:13:07,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213570317] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:07,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037620828] [2023-12-15 17:13:07,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-15 17:13:07,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:07,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:07,068 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) [2023-12-15 17:13:07,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-15 17:13:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:07,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-15 17:13:07,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-15 17:13:07,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-15 17:13:07,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037620828] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:07,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:07,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-12-15 17:13:07,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096419278] [2023-12-15 17:13:07,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:07,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-15 17:13:07,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:07,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-15 17:13:07,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2023-12-15 17:13:07,387 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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) [2023-12-15 17:13:07,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:07,483 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2023-12-15 17:13:07,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-15 17:13:07,485 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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 32 [2023-12-15 17:13:07,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:07,485 INFO L225 Difference]: With dead ends: 68 [2023-12-15 17:13:07,485 INFO L226 Difference]: Without dead ends: 36 [2023-12-15 17:13:07,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 15 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2023-12-15 17:13:07,486 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:07,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 33 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:13:07,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-15 17:13:07,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-15 17:13:07,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 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) [2023-12-15 17:13:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2023-12-15 17:13:07,500 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 32 [2023-12-15 17:13:07,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:07,500 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2023-12-15 17:13:07,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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) [2023-12-15 17:13:07,501 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2023-12-15 17:13:07,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-15 17:13:07,501 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:07,501 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:07,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-15 17:13:07,704 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 [2023-12-15 17:13:07,705 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:07,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:07,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1878262373, now seen corresponding path program 20 times [2023-12-15 17:13:07,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:07,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976687224] [2023-12-15 17:13:07,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:07,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-15 17:13:07,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:07,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976687224] [2023-12-15 17:13:07,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976687224] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:07,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735905493] [2023-12-15 17:13:07,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 17:13:07,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:07,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:07,880 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) [2023-12-15 17:13:07,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-15 17:13:07,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 17:13:07,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:07,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-15 17:13:07,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-15 17:13:08,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-15 17:13:08,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735905493] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:08,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:08,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-12-15 17:13:08,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439387816] [2023-12-15 17:13:08,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:08,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-15 17:13:08,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:08,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-15 17:13:08,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2023-12-15 17:13:08,177 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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) [2023-12-15 17:13:08,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:08,259 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2023-12-15 17:13:08,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-15 17:13:08,260 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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 33 [2023-12-15 17:13:08,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:08,260 INFO L225 Difference]: With dead ends: 49 [2023-12-15 17:13:08,260 INFO L226 Difference]: Without dead ends: 35 [2023-12-15 17:13:08,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2023-12-15 17:13:08,261 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:08,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 27 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:13:08,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-15 17:13:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-12-15 17:13:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 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) [2023-12-15 17:13:08,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-12-15 17:13:08,281 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 33 [2023-12-15 17:13:08,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:08,282 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-12-15 17:13:08,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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) [2023-12-15 17:13:08,282 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-12-15 17:13:08,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-15 17:13:08,282 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:08,282 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:08,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:08,486 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 [2023-12-15 17:13:08,486 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:08,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:08,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1929949469, now seen corresponding path program 21 times [2023-12-15 17:13:08,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:08,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144166481] [2023-12-15 17:13:08,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:08,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:09,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:09,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144166481] [2023-12-15 17:13:09,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144166481] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:09,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111897165] [2023-12-15 17:13:09,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 17:13:09,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:09,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:09,645 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) [2023-12-15 17:13:09,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-15 17:13:09,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-15 17:13:09,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:09,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 101 conjunts are in the unsatisfiable core [2023-12-15 17:13:09,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:09,858 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 [2023-12-15 17:13:09,882 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 [2023-12-15 17:13:10,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 17:13:10,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 17:13:10,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 17:13:10,848 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 17:13:10,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 44 treesize of output 59 [2023-12-15 17:13:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:10,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:12,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-12-15 17:13:12,400 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 17:13:12,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 160 treesize of output 132 [2023-12-15 17:13:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:12,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111897165] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:12,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:12,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33, 33] total 87 [2023-12-15 17:13:12,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378007947] [2023-12-15 17:13:12,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:12,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2023-12-15 17:13:12,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:12,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2023-12-15 17:13:12,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=6981, Unknown=0, NotChecked=0, Total=7482 [2023-12-15 17:13:12,827 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 87 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) [2023-12-15 17:13:15,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:15,749 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2023-12-15 17:13:15,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-12-15 17:13:15,749 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 87 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 34 [2023-12-15 17:13:15,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:15,750 INFO L225 Difference]: With dead ends: 73 [2023-12-15 17:13:15,750 INFO L226 Difference]: Without dead ends: 67 [2023-12-15 17:13:15,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3147 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=909, Invalid=12431, Unknown=0, NotChecked=0, Total=13340 [2023-12-15 17:13:15,751 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:15,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 120 Invalid, 1854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-15 17:13:15,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-15 17:13:15,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 38. [2023-12-15 17:13:15,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 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) [2023-12-15 17:13:15,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2023-12-15 17:13:15,769 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 34 [2023-12-15 17:13:15,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:15,770 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2023-12-15 17:13:15,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 87 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) [2023-12-15 17:13:15,770 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2023-12-15 17:13:15,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-15 17:13:15,770 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:15,770 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:15,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:15,974 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 [2023-12-15 17:13:15,975 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:15,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:15,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1326634856, now seen corresponding path program 22 times [2023-12-15 17:13:15,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:15,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611906227] [2023-12-15 17:13:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:15,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-15 17:13:16,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:16,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611906227] [2023-12-15 17:13:16,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611906227] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:16,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486972912] [2023-12-15 17:13:16,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 17:13:16,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:16,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:16,172 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) [2023-12-15 17:13:16,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-15 17:13:16,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 17:13:16,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:16,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-15 17:13:16,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-15 17:13:16,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-15 17:13:16,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486972912] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:16,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:16,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2023-12-15 17:13:16,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795260595] [2023-12-15 17:13:16,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:16,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-15 17:13:16,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:16,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-15 17:13:16,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=2029, Unknown=0, NotChecked=0, Total=2352 [2023-12-15 17:13:16,826 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 49 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:17,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:17,292 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2023-12-15 17:13:17,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-15 17:13:17,293 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-15 17:13:17,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:17,293 INFO L225 Difference]: With dead ends: 83 [2023-12-15 17:13:17,293 INFO L226 Difference]: Without dead ends: 48 [2023-12-15 17:13:17,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 32 SyntacticMatches, 10 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=676, Invalid=4154, Unknown=0, NotChecked=0, Total=4830 [2023-12-15 17:13:17,294 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:17,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 40 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 17:13:17,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-15 17:13:17,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2023-12-15 17:13:17,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 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) [2023-12-15 17:13:17,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2023-12-15 17:13:17,315 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 35 [2023-12-15 17:13:17,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:17,315 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2023-12-15 17:13:17,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:17,315 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2023-12-15 17:13:17,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-15 17:13:17,315 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:17,315 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:17,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-15 17:13:17,519 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 [2023-12-15 17:13:17,520 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:17,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:17,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1742134021, now seen corresponding path program 23 times [2023-12-15 17:13:17,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:17,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648387169] [2023-12-15 17:13:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:17,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-15 17:13:17,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:17,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648387169] [2023-12-15 17:13:17,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648387169] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:17,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52938658] [2023-12-15 17:13:17,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 17:13:17,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:17,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:17,760 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) [2023-12-15 17:13:17,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-15 17:13:17,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-15 17:13:17,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:17,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-15 17:13:17,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-15 17:13:18,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-15 17:13:18,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52938658] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:18,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:18,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-12-15 17:13:18,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426927446] [2023-12-15 17:13:18,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:18,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-15 17:13:18,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:18,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-15 17:13:18,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2023-12-15 17:13:18,196 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 32 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:18,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:18,288 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2023-12-15 17:13:18,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-15 17:13:18,288 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-15 17:13:18,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:18,288 INFO L225 Difference]: With dead ends: 53 [2023-12-15 17:13:18,288 INFO L226 Difference]: Without dead ends: 38 [2023-12-15 17:13:18,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 43 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2023-12-15 17:13:18,289 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:18,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:13:18,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-15 17:13:18,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-12-15 17:13:18,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-12-15 17:13:18,312 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 36 [2023-12-15 17:13:18,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:18,312 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-12-15 17:13:18,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-12-15 17:13:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-15 17:13:18,313 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:18,313 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:18,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:18,517 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 [2023-12-15 17:13:18,518 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:18,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:18,518 INFO L85 PathProgramCache]: Analyzing trace with hash -47366704, now seen corresponding path program 24 times [2023-12-15 17:13:18,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:18,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521341814] [2023-12-15 17:13:18,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:18,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:19,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:19,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521341814] [2023-12-15 17:13:19,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521341814] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:19,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518607483] [2023-12-15 17:13:19,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 17:13:19,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:19,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:19,907 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) [2023-12-15 17:13:19,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-15 17:13:20,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-15 17:13:20,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:20,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 107 conjunts are in the unsatisfiable core [2023-12-15 17:13:20,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:20,141 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 [2023-12-15 17:13:21,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 17:13:21,335 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 17:13:21,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-12-15 17:13:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:21,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:23,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 84 [2023-12-15 17:13:23,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 17:13:23,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 922 treesize of output 474 [2023-12-15 17:13:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:24,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518607483] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:24,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:24,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 36, 36] total 90 [2023-12-15 17:13:24,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014766430] [2023-12-15 17:13:24,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:24,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-12-15 17:13:24,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:24,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-12-15 17:13:24,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=7471, Unknown=0, NotChecked=0, Total=8010 [2023-12-15 17:13:24,193 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 90 states, 90 states have (on average 1.0666666666666667) internal successors, (96), 90 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:27,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:27,411 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2023-12-15 17:13:27,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-12-15 17:13:27,412 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0666666666666667) internal successors, (96), 90 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-15 17:13:27,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:27,412 INFO L225 Difference]: With dead ends: 79 [2023-12-15 17:13:27,412 INFO L226 Difference]: Without dead ends: 73 [2023-12-15 17:13:27,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3202 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=947, Invalid=13333, Unknown=0, NotChecked=0, Total=14280 [2023-12-15 17:13:27,413 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 49 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:27,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 124 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1967 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-15 17:13:27,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-15 17:13:27,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 41. [2023-12-15 17:13:27,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:27,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2023-12-15 17:13:27,441 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 37 [2023-12-15 17:13:27,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:27,441 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2023-12-15 17:13:27,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.0666666666666667) internal successors, (96), 90 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:27,441 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2023-12-15 17:13:27,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-15 17:13:27,442 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:27,442 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:27,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:27,646 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 [2023-12-15 17:13:27,647 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:27,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:27,647 INFO L85 PathProgramCache]: Analyzing trace with hash 950812571, now seen corresponding path program 25 times [2023-12-15 17:13:27,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:27,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580336192] [2023-12-15 17:13:27,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:27,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-15 17:13:27,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:27,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580336192] [2023-12-15 17:13:27,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580336192] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:27,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702035437] [2023-12-15 17:13:27,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-15 17:13:27,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:27,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:27,929 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) [2023-12-15 17:13:27,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-15 17:13:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:28,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-15 17:13:28,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-15 17:13:28,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-15 17:13:28,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702035437] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:28,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:28,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-12-15 17:13:28,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558042332] [2023-12-15 17:13:28,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:28,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-15 17:13:28,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:28,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-15 17:13:28,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2023-12-15 17:13:28,365 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 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) [2023-12-15 17:13:28,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:28,496 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2023-12-15 17:13:28,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-15 17:13:28,496 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 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 38 [2023-12-15 17:13:28,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:28,496 INFO L225 Difference]: With dead ends: 80 [2023-12-15 17:13:28,496 INFO L226 Difference]: Without dead ends: 42 [2023-12-15 17:13:28,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 19 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2023-12-15 17:13:28,497 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:28,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 30 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:13:28,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-15 17:13:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-12-15 17:13:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 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) [2023-12-15 17:13:28,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2023-12-15 17:13:28,523 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 38 [2023-12-15 17:13:28,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:28,523 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2023-12-15 17:13:28,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 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) [2023-12-15 17:13:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2023-12-15 17:13:28,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-15 17:13:28,524 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:28,524 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:28,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:28,728 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 [2023-12-15 17:13:28,729 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:28,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:28,729 INFO L85 PathProgramCache]: Analyzing trace with hash -844843909, now seen corresponding path program 26 times [2023-12-15 17:13:28,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:28,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097564604] [2023-12-15 17:13:28,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:28,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-15 17:13:28,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:28,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097564604] [2023-12-15 17:13:28,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097564604] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:28,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070574882] [2023-12-15 17:13:28,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 17:13:28,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:28,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:28,904 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) [2023-12-15 17:13:28,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-15 17:13:28,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 17:13:28,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:28,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-15 17:13:28,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-15 17:13:29,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-15 17:13:29,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070574882] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:29,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:29,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-12-15 17:13:29,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309758655] [2023-12-15 17:13:29,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:29,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-15 17:13:29,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:29,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-15 17:13:29,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2023-12-15 17:13:29,252 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 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) [2023-12-15 17:13:29,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:29,363 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2023-12-15 17:13:29,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-15 17:13:29,364 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 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 39 [2023-12-15 17:13:29,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:29,364 INFO L225 Difference]: With dead ends: 57 [2023-12-15 17:13:29,364 INFO L226 Difference]: Without dead ends: 41 [2023-12-15 17:13:29,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2023-12-15 17:13:29,365 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:29,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 21 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:13:29,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-12-15 17:13:29,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-12-15 17:13:29,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 40 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) [2023-12-15 17:13:29,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2023-12-15 17:13:29,390 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 39 [2023-12-15 17:13:29,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:29,390 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2023-12-15 17:13:29,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 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) [2023-12-15 17:13:29,390 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2023-12-15 17:13:29,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-15 17:13:29,390 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:29,391 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:29,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:29,595 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 [2023-12-15 17:13:29,595 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:29,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:29,595 INFO L85 PathProgramCache]: Analyzing trace with hash -393816515, now seen corresponding path program 27 times [2023-12-15 17:13:29,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:29,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130863087] [2023-12-15 17:13:29,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:29,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:31,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:31,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130863087] [2023-12-15 17:13:31,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130863087] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:31,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135890869] [2023-12-15 17:13:31,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 17:13:31,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:31,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:31,686 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) [2023-12-15 17:13:31,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-15 17:13:31,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-15 17:13:31,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:31,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 106 conjunts are in the unsatisfiable core [2023-12-15 17:13:31,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:31,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-15 17:13:33,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 17:13:33,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 17:13:33,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 17:13:33,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 17:13:33,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 17:13:33,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 17:13:33,131 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 17:13:33,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 58 treesize of output 93 [2023-12-15 17:13:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 10 proven. 110 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-15 17:13:33,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-15 17:13:35,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135890869] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:35,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:35,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 29, 32] total 91 [2023-12-15 17:13:35,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331922088] [2023-12-15 17:13:35,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:35,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-12-15 17:13:35,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:35,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-12-15 17:13:35,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=7553, Unknown=0, NotChecked=0, Total=8190 [2023-12-15 17:13:35,118 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 91 states, 91 states have (on average 1.10989010989011) internal successors, (101), 91 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) [2023-12-15 17:13:38,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:38,290 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2023-12-15 17:13:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-15 17:13:38,291 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.10989010989011) internal successors, (101), 91 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-15 17:13:38,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:38,291 INFO L225 Difference]: With dead ends: 61 [2023-12-15 17:13:38,291 INFO L226 Difference]: Without dead ends: 57 [2023-12-15 17:13:38,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2743 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1126, Invalid=13636, Unknown=0, NotChecked=0, Total=14762 [2023-12-15 17:13:38,293 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 65 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:38,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 141 Invalid, 2401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2311 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-15 17:13:38,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-15 17:13:38,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2023-12-15 17:13:38,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2023-12-15 17:13:38,335 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 40 [2023-12-15 17:13:38,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:38,335 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2023-12-15 17:13:38,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.10989010989011) internal successors, (101), 91 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) [2023-12-15 17:13:38,335 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2023-12-15 17:13:38,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-15 17:13:38,336 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:38,337 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:38,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:38,542 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 [2023-12-15 17:13:38,543 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:38,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:38,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1860511496, now seen corresponding path program 28 times [2023-12-15 17:13:38,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:38,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100673254] [2023-12-15 17:13:38,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:38,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-15 17:13:38,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:38,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100673254] [2023-12-15 17:13:38,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100673254] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:38,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030525287] [2023-12-15 17:13:38,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 17:13:38,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:38,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:38,781 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) [2023-12-15 17:13:38,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-15 17:13:38,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 17:13:38,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:38,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-15 17:13:38,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-15 17:13:39,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-15 17:13:39,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030525287] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:39,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:39,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 59 [2023-12-15 17:13:39,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16241137] [2023-12-15 17:13:39,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:39,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-12-15 17:13:39,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:39,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-12-15 17:13:39,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=2963, Unknown=0, NotChecked=0, Total=3422 [2023-12-15 17:13:39,715 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 59 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 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) [2023-12-15 17:13:40,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:40,213 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2023-12-15 17:13:40,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-15 17:13:40,213 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 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 41 [2023-12-15 17:13:40,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:40,213 INFO L225 Difference]: With dead ends: 97 [2023-12-15 17:13:40,213 INFO L226 Difference]: Without dead ends: 56 [2023-12-15 17:13:40,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 36 SyntacticMatches, 12 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=954, Invalid=6018, Unknown=0, NotChecked=0, Total=6972 [2023-12-15 17:13:40,214 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:40,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 45 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 17:13:40,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-15 17:13:40,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2023-12-15 17:13:40,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 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) [2023-12-15 17:13:40,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2023-12-15 17:13:40,250 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 41 [2023-12-15 17:13:40,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:40,250 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2023-12-15 17:13:40,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 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) [2023-12-15 17:13:40,250 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2023-12-15 17:13:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-15 17:13:40,250 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:40,250 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:40,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:40,455 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 [2023-12-15 17:13:40,455 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:40,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:40,456 INFO L85 PathProgramCache]: Analyzing trace with hash 118606811, now seen corresponding path program 29 times [2023-12-15 17:13:40,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:40,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563065960] [2023-12-15 17:13:40,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:40,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-15 17:13:40,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:40,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563065960] [2023-12-15 17:13:40,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563065960] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:40,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418089387] [2023-12-15 17:13:40,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 17:13:40,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:40,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:40,716 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) [2023-12-15 17:13:40,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-15 17:13:40,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-15 17:13:40,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:40,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-15 17:13:40,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-15 17:13:41,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-15 17:13:41,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418089387] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:41,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:41,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 59 [2023-12-15 17:13:41,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176118427] [2023-12-15 17:13:41,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:41,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-12-15 17:13:41,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:41,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-12-15 17:13:41,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=2953, Unknown=0, NotChecked=0, Total=3422 [2023-12-15 17:13:41,686 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 59 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:41,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:41,972 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2023-12-15 17:13:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-15 17:13:41,972 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-15 17:13:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:41,973 INFO L225 Difference]: With dead ends: 61 [2023-12-15 17:13:41,973 INFO L226 Difference]: Without dead ends: 44 [2023-12-15 17:13:41,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=691, Invalid=4279, Unknown=0, NotChecked=0, Total=4970 [2023-12-15 17:13:41,974 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 41 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:41,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 55 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:13:41,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-15 17:13:42,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-12-15 17:13:42,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 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) [2023-12-15 17:13:42,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-12-15 17:13:42,011 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 42 [2023-12-15 17:13:42,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:42,015 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-12-15 17:13:42,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:42,015 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-12-15 17:13:42,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-15 17:13:42,015 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:42,015 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:42,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:42,220 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 [2023-12-15 17:13:42,221 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:42,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:42,221 INFO L85 PathProgramCache]: Analyzing trace with hash 927447600, now seen corresponding path program 30 times [2023-12-15 17:13:42,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:42,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929736569] [2023-12-15 17:13:42,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:42,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 21 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:45,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:45,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929736569] [2023-12-15 17:13:45,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929736569] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:45,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863057993] [2023-12-15 17:13:45,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 17:13:45,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:45,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:45,045 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) [2023-12-15 17:13:45,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-15 17:13:45,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-15 17:13:45,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:45,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 127 conjunts are in the unsatisfiable core [2023-12-15 17:13:45,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:45,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 Received shutdown request... [2023-12-15 17:13:46,443 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 17:13:46,451 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 17:13:46,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:46,476 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 [2023-12-15 17:13:46,644 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 [2023-12-15 17:13:46,644 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 44 with TraceHistMax 11,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-3-1 term,while SimplifyDDA2 was simplifying 3 xjuncts wrt. a ATOM-1 context. [2023-12-15 17:13:46,648 INFO L445 BasicCegarLoop]: Path program histogram: [30, 1, 1, 1] [2023-12-15 17:13:46,650 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 17:13:46,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 05:13:46 BoogieIcfgContainer [2023-12-15 17:13:46,652 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 17:13:46,653 INFO L158 Benchmark]: Toolchain (without parser) took 68784.91ms. Allocated memory was 208.7MB in the beginning and 515.9MB in the end (delta: 307.2MB). Free memory was 146.2MB in the beginning and 381.7MB in the end (delta: -235.5MB). Peak memory consumption was 72.7MB. Max. memory is 8.0GB. [2023-12-15 17:13:46,653 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 208.7MB. Free memory is still 158.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 17:13:46,653 INFO L158 Benchmark]: CACSL2BoogieTranslator took 137.57ms. Allocated memory is still 208.7MB. Free memory was 146.2MB in the beginning and 135.2MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-15 17:13:46,653 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.91ms. Allocated memory is still 208.7MB. Free memory was 135.2MB in the beginning and 133.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 17:13:46,653 INFO L158 Benchmark]: Boogie Preprocessor took 29.77ms. Allocated memory is still 208.7MB. Free memory was 133.6MB in the beginning and 131.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 17:13:46,654 INFO L158 Benchmark]: RCFGBuilder took 221.92ms. Allocated memory is still 208.7MB. Free memory was 131.5MB in the beginning and 118.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-15 17:13:46,654 INFO L158 Benchmark]: TraceAbstraction took 68366.84ms. Allocated memory was 208.7MB in the beginning and 515.9MB in the end (delta: 307.2MB). Free memory was 118.4MB in the beginning and 381.7MB in the end (delta: -263.2MB). Peak memory consumption was 45.4MB. Max. memory is 8.0GB. [2023-12-15 17:13:46,654 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 208.7MB. Free memory is still 158.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 137.57ms. Allocated memory is still 208.7MB. Free memory was 146.2MB in the beginning and 135.2MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.91ms. Allocated memory is still 208.7MB. Free memory was 135.2MB in the beginning and 133.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.77ms. Allocated memory is still 208.7MB. Free memory was 133.6MB in the beginning and 131.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 221.92ms. Allocated memory is still 208.7MB. Free memory was 131.5MB in the beginning and 118.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 68366.84ms. Allocated memory was 208.7MB in the beginning and 515.9MB in the end (delta: 307.2MB). Free memory was 118.4MB in the beginning and 381.7MB in the end (delta: -263.2MB). Peak memory consumption was 45.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 8]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 8). Cancelled while NwaCegarLoop was analyzing trace of length 44 with TraceHistMax 11,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-3-1 term,while SimplifyDDA2 was simplifying 3 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 68.3s, OverallIterations: 33, TraceHistogramMax: 11, PathProgramHistogramMax: 30, EmptinessCheckTime: 0.0s, AutomataDifference: 18.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 632 SdHoareTripleChecker+Valid, 6.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 632 mSDsluCounter, 1550 SdHoareTripleChecker+Invalid, 5.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1341 mSDsCounter, 770 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14771 IncrementalHoareTripleChecker+Invalid, 15541 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 770 mSolverCounterUnsat, 209 mSDtfsCounter, 14771 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2406 GetRequests, 827 SyntacticMatches, 208 SemanticMatches, 1371 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27747 ImplicationChecksByTransitivity, 34.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=30, InterpolantAutomatonStates: 764, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 32 MinimizatonAttempts, 195 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 36.0s InterpolantComputationTime, 1651 NumberOfCodeBlocks, 1611 NumberOfCodeBlocksAsserted, 115 NumberOfCheckSat, 2371 ConstructedInterpolants, 7 QuantifiedInterpolants, 23004 SizeOfPredicates, 156 NumberOfNonLiveVariables, 4402 ConjunctsInSsa, 966 ConjunctsInUnsatCore, 90 InterpolantComputations, 3 PerfectInterpolantSequences, 2995/6505 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown