/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/bor2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 19:11:20,162 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 19:11:20,238 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 19:11:20,243 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 19:11:20,244 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 19:11:20,277 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 19:11:20,277 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 19:11:20,278 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 19:11:20,278 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 19:11:20,286 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 19:11:20,286 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 19:11:20,287 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 19:11:20,288 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 19:11:20,289 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 19:11:20,289 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 19:11:20,290 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 19:11:20,290 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 19:11:20,290 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 19:11:20,290 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 19:11:20,290 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 19:11:20,291 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 19:11:20,291 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 19:11:20,291 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 19:11:20,292 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 19:11:20,292 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 19:11:20,292 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 19:11:20,292 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 19:11:20,292 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 19:11:20,293 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 19:11:20,293 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 19:11:20,294 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 19:11:20,295 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 19:11:20,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 19:11:20,295 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 19:11:20,295 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 19:11:20,295 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 19:11:20,295 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 19:11:20,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 19:11:20,296 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 19:11:20,296 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 19:11:20,296 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 19:11:20,297 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 19:11:20,297 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 19:11:20,297 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 19:11:20,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 19:11:20,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 19:11:20,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 19:11:20,574 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 19:11:20,575 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 19:11:20,576 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bor2.i [2023-12-18 19:11:21,767 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 19:11:21,958 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 19:11:21,958 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bor2.i [2023-12-18 19:11:21,965 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26f21645b/0e7f75d03e1b4a1699506f90fd3811b4/FLAG275da78f9 [2023-12-18 19:11:21,979 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26f21645b/0e7f75d03e1b4a1699506f90fd3811b4 [2023-12-18 19:11:21,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 19:11:21,983 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 19:11:21,986 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 19:11:21,986 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 19:11:21,991 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 19:11:21,991 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:11:21" (1/1) ... [2023-12-18 19:11:21,992 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74fe182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:11:21, skipping insertion in model container [2023-12-18 19:11:21,992 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:11:21" (1/1) ... [2023-12-18 19:11:22,010 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 19:11:22,163 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/bor2.i[1291,1304] [2023-12-18 19:11:22,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 19:11:22,174 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 19:11:22,191 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/bor2.i[1291,1304] [2023-12-18 19:11:22,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 19:11:22,204 INFO L206 MainTranslator]: Completed translation [2023-12-18 19:11:22,205 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:11:22 WrapperNode [2023-12-18 19:11:22,205 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 19:11:22,206 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 19:11:22,206 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 19:11:22,206 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 19:11:22,212 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:11:22" (1/1) ... [2023-12-18 19:11:22,222 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:11:22" (1/1) ... [2023-12-18 19:11:22,238 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 76 [2023-12-18 19:11:22,238 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 19:11:22,239 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 19:11:22,239 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 19:11:22,239 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 19:11:22,246 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:11:22" (1/1) ... [2023-12-18 19:11:22,246 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:11:22" (1/1) ... [2023-12-18 19:11:22,248 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:11:22" (1/1) ... [2023-12-18 19:11:22,261 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 7, 11]. 55 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0]. The 5 writes are split as follows [0, 0, 5]. [2023-12-18 19:11:22,261 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:11:22" (1/1) ... [2023-12-18 19:11:22,262 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:11:22" (1/1) ... [2023-12-18 19:11:22,268 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:11:22" (1/1) ... [2023-12-18 19:11:22,272 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:11:22" (1/1) ... [2023-12-18 19:11:22,273 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:11:22" (1/1) ... [2023-12-18 19:11:22,274 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:11:22" (1/1) ... [2023-12-18 19:11:22,276 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 19:11:22,277 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 19:11:22,277 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 19:11:22,277 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 19:11:22,278 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:11:22" (1/1) ... [2023-12-18 19:11:22,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 19:11:22,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:11:22,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-18 19:11:22,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-18 19:11:22,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 19:11:22,347 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2023-12-18 19:11:22,348 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2023-12-18 19:11:22,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 19:11:22,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 19:11:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 19:11:22,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 19:11:22,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 19:11:22,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 19:11:22,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 19:11:22,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 19:11:22,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 19:11:22,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 19:11:22,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 19:11:22,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 19:11:22,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 19:11:22,450 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 19:11:22,453 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 19:11:22,677 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 19:11:22,724 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 19:11:22,724 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-18 19:11:22,725 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:11:22 BoogieIcfgContainer [2023-12-18 19:11:22,725 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 19:11:22,727 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 19:11:22,727 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 19:11:22,730 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 19:11:22,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:11:21" (1/3) ... [2023-12-18 19:11:22,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d290cfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:11:22, skipping insertion in model container [2023-12-18 19:11:22,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:11:22" (2/3) ... [2023-12-18 19:11:22,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d290cfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:11:22, skipping insertion in model container [2023-12-18 19:11:22,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:11:22" (3/3) ... [2023-12-18 19:11:22,735 INFO L112 eAbstractionObserver]: Analyzing ICFG bor2.i [2023-12-18 19:11:22,751 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 19:11:22,752 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 19:11:22,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 19:11:22,808 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;@6c08796, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 19:11:22,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 19:11:22,811 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:11:22,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-18 19:11:22,821 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:11:22,822 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:11:22,822 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:11:22,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:11:22,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1143770574, now seen corresponding path program 1 times [2023-12-18 19:11:22,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:11:22,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914634486] [2023-12-18 19:11:22,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:11:22,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:11:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:23,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-18 19:11:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:23,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-18 19:11:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:23,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 19:11:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 19:11:23,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:11:23,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914634486] [2023-12-18 19:11:23,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914634486] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:11:23,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356726054] [2023-12-18 19:11:23,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:11:23,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:23,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:11:23,124 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:11:23,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 19:11:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:23,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 19:11:23,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:11:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 19:11:23,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 19:11:23,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356726054] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:11:23,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 19:11:23,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-12-18 19:11:23,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778981606] [2023-12-18 19:11:23,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:11:23,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 19:11:23,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:11:23,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 19:11:23,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 19:11:23,353 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 19:11:23,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:11:23,386 INFO L93 Difference]: Finished difference Result 45 states and 68 transitions. [2023-12-18 19:11:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 19:11:23,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-12-18 19:11:23,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:11:23,397 INFO L225 Difference]: With dead ends: 45 [2023-12-18 19:11:23,397 INFO L226 Difference]: Without dead ends: 22 [2023-12-18 19:11:23,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 19:11:23,407 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:11:23,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:11:23,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-18 19:11:23,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-18 19:11:23,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:11:23,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-12-18 19:11:23,440 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 25 [2023-12-18 19:11:23,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:11:23,441 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-12-18 19:11:23,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 19:11:23,441 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-12-18 19:11:23,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 19:11:23,444 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:11:23,444 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:11:23,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-18 19:11:23,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-18 19:11:23,647 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:11:23,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:11:23,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1668871841, now seen corresponding path program 1 times [2023-12-18 19:11:23,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:11:23,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426578685] [2023-12-18 19:11:23,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:11:23,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:11:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:23,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-18 19:11:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:23,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-18 19:11:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:23,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-18 19:11:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 19:11:23,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:11:23,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426578685] [2023-12-18 19:11:23,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426578685] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:11:23,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704125892] [2023-12-18 19:11:23,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:11:23,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:23,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:11:23,839 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:11:23,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 19:11:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:23,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 19:11:23,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:11:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-18 19:11:23,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 19:11:23,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704125892] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:11:23,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 19:11:23,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-12-18 19:11:23,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468055148] [2023-12-18 19:11:23,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:11:23,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 19:11:23,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:11:23,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 19:11:23,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 19:11:23,929 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 19:11:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:11:23,954 INFO L93 Difference]: Finished difference Result 43 states and 59 transitions. [2023-12-18 19:11:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 19:11:23,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-12-18 19:11:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:11:23,956 INFO L225 Difference]: With dead ends: 43 [2023-12-18 19:11:23,956 INFO L226 Difference]: Without dead ends: 26 [2023-12-18 19:11:23,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 19:11:23,960 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:11:23,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 40 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:11:23,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-18 19:11:23,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-12-18 19:11:23,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:11:23,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-12-18 19:11:23,978 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 26 [2023-12-18 19:11:23,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:11:23,978 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-12-18 19:11:23,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 19:11:23,978 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-12-18 19:11:23,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-18 19:11:23,979 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:11:23,979 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:11:23,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-18 19:11:24,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-18 19:11:24,186 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:11:24,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:11:24,187 INFO L85 PathProgramCache]: Analyzing trace with hash 220189929, now seen corresponding path program 1 times [2023-12-18 19:11:24,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:11:24,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549261843] [2023-12-18 19:11:24,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:11:24,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:11:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:24,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-18 19:11:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:24,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 19:11:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:24,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-18 19:11:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 19:11:24,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:11:24,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549261843] [2023-12-18 19:11:24,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549261843] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:11:24,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641189461] [2023-12-18 19:11:24,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:11:24,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:24,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:11:24,359 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:11:24,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 19:11:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:24,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 19:11:24,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:11:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 19:11:24,469 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 19:11:24,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641189461] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:11:24,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 19:11:24,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-18 19:11:24,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335157858] [2023-12-18 19:11:24,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:11:24,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 19:11:24,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:11:24,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 19:11:24,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-18 19:11:24,472 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 19:11:24,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:11:24,492 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2023-12-18 19:11:24,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 19:11:24,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-12-18 19:11:24,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:11:24,493 INFO L225 Difference]: With dead ends: 38 [2023-12-18 19:11:24,494 INFO L226 Difference]: Without dead ends: 24 [2023-12-18 19:11:24,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-18 19:11:24,497 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 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 [2023-12-18 19:11:24,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:11:24,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-18 19:11:24,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-18 19:11:24,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:11:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-12-18 19:11:24,507 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 35 [2023-12-18 19:11:24,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:11:24,508 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-12-18 19:11:24,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 19:11:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-12-18 19:11:24,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-18 19:11:24,510 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:11:24,510 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:11:24,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 19:11:24,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:24,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:11:24,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:11:24,717 INFO L85 PathProgramCache]: Analyzing trace with hash -727189650, now seen corresponding path program 1 times [2023-12-18 19:11:24,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:11:24,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426856177] [2023-12-18 19:11:24,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:11:24,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:11:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:24,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-18 19:11:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:24,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 19:11:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:24,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-18 19:11:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-18 19:11:24,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:11:24,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426856177] [2023-12-18 19:11:24,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426856177] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:11:24,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400965984] [2023-12-18 19:11:24,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:11:24,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:24,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:11:24,862 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:11:24,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 19:11:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:24,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-18 19:11:24,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:11:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-18 19:11:24,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:11:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-18 19:11:25,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400965984] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:11:25,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:11:25,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-12-18 19:11:25,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182765663] [2023-12-18 19:11:25,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:11:25,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 19:11:25,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:11:25,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 19:11:25,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-18 19:11:25,045 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-18 19:11:25,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:11:25,095 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2023-12-18 19:11:25,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 19:11:25,100 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 36 [2023-12-18 19:11:25,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:11:25,101 INFO L225 Difference]: With dead ends: 55 [2023-12-18 19:11:25,101 INFO L226 Difference]: Without dead ends: 34 [2023-12-18 19:11:25,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-18 19:11:25,102 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:11:25,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 82 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:11:25,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-18 19:11:25,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2023-12-18 19:11:25,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:11:25,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-12-18 19:11:25,113 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 36 [2023-12-18 19:11:25,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:11:25,113 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-12-18 19:11:25,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-18 19:11:25,113 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-12-18 19:11:25,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-18 19:11:25,114 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:11:25,114 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:11:25,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 19:11:25,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:25,315 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:11:25,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:11:25,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1910194571, now seen corresponding path program 2 times [2023-12-18 19:11:25,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:11:25,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803435342] [2023-12-18 19:11:25,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:11:25,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:11:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:25,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 19:11:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:25,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-18 19:11:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:25,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-12-18 19:11:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-12-18 19:11:25,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:11:25,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803435342] [2023-12-18 19:11:25,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803435342] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:11:25,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881475696] [2023-12-18 19:11:25,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:11:25,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:25,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:11:25,420 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:11:25,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 19:11:25,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:11:25,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:11:25,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 19:11:25,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:11:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-18 19:11:25,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:11:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-18 19:11:25,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881475696] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:11:25,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:11:25,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-12-18 19:11:25,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433438796] [2023-12-18 19:11:25,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:11:25,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-18 19:11:25,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:11:25,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-18 19:11:25,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-18 19:11:25,627 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-18 19:11:25,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:11:25,658 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2023-12-18 19:11:25,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 19:11:25,658 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2023-12-18 19:11:25,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:11:25,659 INFO L225 Difference]: With dead ends: 63 [2023-12-18 19:11:25,659 INFO L226 Difference]: Without dead ends: 38 [2023-12-18 19:11:25,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-18 19:11:25,660 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:11:25,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:11:25,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-18 19:11:25,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-12-18 19:11:25,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:11:25,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2023-12-18 19:11:25,666 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 48 [2023-12-18 19:11:25,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:11:25,666 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2023-12-18 19:11:25,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-18 19:11:25,666 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2023-12-18 19:11:25,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-18 19:11:25,667 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:11:25,667 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:11:25,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-18 19:11:25,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:25,877 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:11:25,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:11:25,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1702488334, now seen corresponding path program 3 times [2023-12-18 19:11:25,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:11:25,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121042161] [2023-12-18 19:11:25,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:11:25,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:11:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:25,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 19:11:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:26,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-18 19:11:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:26,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-12-18 19:11:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 19:11:26,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:11:26,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121042161] [2023-12-18 19:11:26,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121042161] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:11:26,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185653689] [2023-12-18 19:11:26,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:11:26,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:26,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:11:26,034 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:11:26,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 19:11:26,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 19:11:26,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:11:26,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 19:11:26,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:11:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 19:11:26,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:11:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-12-18 19:11:26,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185653689] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:11:26,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:11:26,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-12-18 19:11:26,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253261913] [2023-12-18 19:11:26,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:11:26,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 19:11:26,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:11:26,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 19:11:26,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-12-18 19:11:26,210 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:11:26,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:11:26,258 INFO L93 Difference]: Finished difference Result 73 states and 99 transitions. [2023-12-18 19:11:26,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-18 19:11:26,263 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2023-12-18 19:11:26,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:11:26,265 INFO L225 Difference]: With dead ends: 73 [2023-12-18 19:11:26,265 INFO L226 Difference]: Without dead ends: 49 [2023-12-18 19:11:26,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-12-18 19:11:26,268 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:11:26,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 117 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:11:26,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-18 19:11:26,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2023-12-18 19:11:26,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:11:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-12-18 19:11:26,284 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 55 [2023-12-18 19:11:26,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:11:26,285 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-12-18 19:11:26,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:11:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-12-18 19:11:26,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-18 19:11:26,287 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:11:26,287 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:11:26,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-18 19:11:26,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:26,503 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:11:26,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:11:26,504 INFO L85 PathProgramCache]: Analyzing trace with hash 247386870, now seen corresponding path program 4 times [2023-12-18 19:11:26,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:11:26,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284139876] [2023-12-18 19:11:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:11:26,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:11:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:26,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 19:11:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:26,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-18 19:11:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:26,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-12-18 19:11:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-12-18 19:11:26,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:11:26,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284139876] [2023-12-18 19:11:26,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284139876] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:11:26,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503315770] [2023-12-18 19:11:26,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:11:26,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:26,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:11:26,753 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:11:26,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-18 19:11:26,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:11:26,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:11:26,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-18 19:11:26,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:11:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-12-18 19:11:26,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:11:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-12-18 19:11:26,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503315770] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:11:26,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:11:26,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2023-12-18 19:11:26,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241223719] [2023-12-18 19:11:26,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:11:26,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-18 19:11:26,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:11:26,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-18 19:11:26,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2023-12-18 19:11:26,990 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:11:27,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:11:27,053 INFO L93 Difference]: Finished difference Result 101 states and 139 transitions. [2023-12-18 19:11:27,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-18 19:11:27,053 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 68 [2023-12-18 19:11:27,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:11:27,054 INFO L225 Difference]: With dead ends: 101 [2023-12-18 19:11:27,054 INFO L226 Difference]: Without dead ends: 67 [2023-12-18 19:11:27,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2023-12-18 19:11:27,058 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:11:27,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 151 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:11:27,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-18 19:11:27,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-12-18 19:11:27,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 62 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:11:27,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2023-12-18 19:11:27,067 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 68 [2023-12-18 19:11:27,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:11:27,067 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2023-12-18 19:11:27,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:11:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2023-12-18 19:11:27,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-18 19:11:27,068 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:11:27,068 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 11, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:11:27,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-18 19:11:27,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:27,276 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:11:27,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:11:27,276 INFO L85 PathProgramCache]: Analyzing trace with hash 782687711, now seen corresponding path program 5 times [2023-12-18 19:11:27,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:11:27,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041822272] [2023-12-18 19:11:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:11:27,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:11:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:27,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-12-18 19:11:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:27,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-12-18 19:11:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:27,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-12-18 19:11:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 933 trivial. 0 not checked. [2023-12-18 19:11:27,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:11:27,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041822272] [2023-12-18 19:11:27,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041822272] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:11:27,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013926514] [2023-12-18 19:11:27,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:11:27,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:27,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:11:27,624 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:11:27,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 19:11:28,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-12-18 19:11:28,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:11:28,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 19:11:28,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:11:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 420 proven. 92 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2023-12-18 19:11:28,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:11:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 514 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2023-12-18 19:11:28,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013926514] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:11:28,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:11:28,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2023-12-18 19:11:28,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486402191] [2023-12-18 19:11:28,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:11:28,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-18 19:11:28,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:11:28,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-18 19:11:28,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2023-12-18 19:11:28,629 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:11:28,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:11:28,726 INFO L93 Difference]: Finished difference Result 162 states and 235 transitions. [2023-12-18 19:11:28,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-18 19:11:28,727 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 114 [2023-12-18 19:11:28,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:11:28,728 INFO L225 Difference]: With dead ends: 162 [2023-12-18 19:11:28,728 INFO L226 Difference]: Without dead ends: 108 [2023-12-18 19:11:28,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2023-12-18 19:11:28,730 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 109 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:11:28,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 251 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:11:28,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-12-18 19:11:28,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-12-18 19:11:28,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.3786407766990292) internal successors, (142), 103 states have internal predecessors, (142), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:11:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 148 transitions. [2023-12-18 19:11:28,738 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 148 transitions. Word has length 114 [2023-12-18 19:11:28,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:11:28,738 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 148 transitions. [2023-12-18 19:11:28,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:11:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 148 transitions. [2023-12-18 19:11:28,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-12-18 19:11:28,741 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:11:28,741 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 12, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:11:28,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-18 19:11:28,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-18 19:11:28,950 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:11:28,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:11:28,950 INFO L85 PathProgramCache]: Analyzing trace with hash 2082430674, now seen corresponding path program 6 times [2023-12-18 19:11:28,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:11:28,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509176049] [2023-12-18 19:11:28,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:11:28,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:11:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:29,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-18 19:11:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:29,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-12-18 19:11:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:29,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2023-12-18 19:11:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4488 trivial. 0 not checked. [2023-12-18 19:11:29,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:11:29,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509176049] [2023-12-18 19:11:29,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509176049] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:11:29,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160240493] [2023-12-18 19:11:29,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 19:11:29,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:29,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:11:29,465 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:11:29,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-18 19:11:29,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-12-18 19:11:29,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:11:29,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 19:11:29,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:11:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 2024 proven. 21 refuted. 0 times theorem prover too weak. 2521 trivial. 0 not checked. [2023-12-18 19:11:29,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:11:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4545 trivial. 0 not checked. [2023-12-18 19:11:30,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160240493] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:11:30,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:11:30,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2023-12-18 19:11:30,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490849036] [2023-12-18 19:11:30,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:11:30,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-18 19:11:30,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:11:30,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-18 19:11:30,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-12-18 19:11:30,009 INFO L87 Difference]: Start difference. First operand 108 states and 148 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:11:30,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:11:30,055 INFO L93 Difference]: Finished difference Result 211 states and 299 transitions. [2023-12-18 19:11:30,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-18 19:11:30,060 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 205 [2023-12-18 19:11:30,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:11:30,063 INFO L225 Difference]: With dead ends: 211 [2023-12-18 19:11:30,063 INFO L226 Difference]: Without dead ends: 117 [2023-12-18 19:11:30,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-12-18 19:11:30,066 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:11:30,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 139 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:11:30,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-12-18 19:11:30,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-12-18 19:11:30,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.3482142857142858) internal successors, (151), 112 states have internal predecessors, (151), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:11:30,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 157 transitions. [2023-12-18 19:11:30,084 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 157 transitions. Word has length 205 [2023-12-18 19:11:30,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:11:30,086 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 157 transitions. [2023-12-18 19:11:30,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:11:30,086 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 157 transitions. [2023-12-18 19:11:30,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-12-18 19:11:30,090 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:11:30,090 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 14, 13, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:11:30,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-18 19:11:30,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:30,298 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:11:30,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:11:30,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1810196225, now seen corresponding path program 7 times [2023-12-18 19:11:30,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:11:30,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542249244] [2023-12-18 19:11:30,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:11:30,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:11:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:30,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 19:11:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:30,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-12-18 19:11:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:30,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2023-12-18 19:11:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-18 19:11:30,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:11:30,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542249244] [2023-12-18 19:11:30,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542249244] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:11:30,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494292481] [2023-12-18 19:11:30,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 19:11:30,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:30,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:11:30,807 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:11:30,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-18 19:11:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:31,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-18 19:11:31,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:11:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-18 19:11:31,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:11:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-18 19:11:31,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494292481] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:11:31,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:11:31,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 31 [2023-12-18 19:11:31,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164732835] [2023-12-18 19:11:31,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:11:31,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-18 19:11:31,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:11:31,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-18 19:11:31,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-12-18 19:11:31,409 INFO L87 Difference]: Start difference. First operand 117 states and 157 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-18 19:11:31,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:11:31,456 INFO L93 Difference]: Finished difference Result 234 states and 328 transitions. [2023-12-18 19:11:31,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-18 19:11:31,457 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 214 [2023-12-18 19:11:31,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:11:31,458 INFO L225 Difference]: With dead ends: 234 [2023-12-18 19:11:31,458 INFO L226 Difference]: Without dead ends: 132 [2023-12-18 19:11:31,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-12-18 19:11:31,459 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:11:31,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:11:31,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-18 19:11:31,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-12-18 19:11:31,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.3070866141732282) internal successors, (166), 127 states have internal predecessors, (166), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:11:31,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 172 transitions. [2023-12-18 19:11:31,466 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 172 transitions. Word has length 214 [2023-12-18 19:11:31,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:11:31,466 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 172 transitions. [2023-12-18 19:11:31,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-18 19:11:31,466 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 172 transitions. [2023-12-18 19:11:31,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-12-18 19:11:31,468 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:11:31,468 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 28, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:11:31,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-18 19:11:31,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-18 19:11:31,677 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:11:31,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:11:31,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1342335058, now seen corresponding path program 8 times [2023-12-18 19:11:31,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:11:31,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840135808] [2023-12-18 19:11:31,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:11:31,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:11:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:32,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-18 19:11:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:32,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-12-18 19:11:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:32,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2023-12-18 19:11:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-18 19:11:32,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:11:32,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840135808] [2023-12-18 19:11:32,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840135808] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:11:32,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191520042] [2023-12-18 19:11:32,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:11:32,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:32,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:11:32,841 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:11:32,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-18 19:11:33,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:11:33,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:11:33,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-18 19:11:33,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:11:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-18 19:11:33,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:11:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-18 19:11:34,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191520042] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:11:34,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:11:34,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 61 [2023-12-18 19:11:34,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903233642] [2023-12-18 19:11:34,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:11:34,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-18 19:11:34,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:11:34,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-18 19:11:34,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-12-18 19:11:34,331 INFO L87 Difference]: Start difference. First operand 132 states and 172 transitions. Second operand has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-18 19:11:34,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:11:34,404 INFO L93 Difference]: Finished difference Result 264 states and 373 transitions. [2023-12-18 19:11:34,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-12-18 19:11:34,405 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 229 [2023-12-18 19:11:34,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:11:34,407 INFO L225 Difference]: With dead ends: 264 [2023-12-18 19:11:34,407 INFO L226 Difference]: Without dead ends: 162 [2023-12-18 19:11:34,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-12-18 19:11:34,410 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:11:34,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:11:34,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-12-18 19:11:34,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2023-12-18 19:11:34,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2484076433121019) internal successors, (196), 157 states have internal predecessors, (196), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:11:34,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2023-12-18 19:11:34,417 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 229 [2023-12-18 19:11:34,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:11:34,417 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2023-12-18 19:11:34,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-18 19:11:34,417 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2023-12-18 19:11:34,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-12-18 19:11:34,419 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:11:34,420 INFO L195 NwaCegarLoop]: trace histogram [58, 54, 54, 54, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:11:34,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-18 19:11:34,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-18 19:11:34,628 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:11:34,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:11:34,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1392892750, now seen corresponding path program 9 times [2023-12-18 19:11:34,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:11:34,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636159963] [2023-12-18 19:11:34,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:11:34,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:11:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:37,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-18 19:11:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:37,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2023-12-18 19:11:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:37,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2023-12-18 19:11:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:37,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-12-18 19:11:37,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:11:37,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636159963] [2023-12-18 19:11:37,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636159963] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:11:37,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911259357] [2023-12-18 19:11:37,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:11:37,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:37,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:11:37,617 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:11:37,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-18 19:11:39,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-18 19:11:39,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:11:39,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 19:11:39,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:11:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 2024 proven. 105 refuted. 0 times theorem prover too weak. 4154 trivial. 0 not checked. [2023-12-18 19:11:40,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:11:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 6178 trivial. 0 not checked. [2023-12-18 19:11:41,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911259357] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:11:41,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:11:41,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 17, 17] total 91 [2023-12-18 19:11:41,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759527482] [2023-12-18 19:11:41,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:11:41,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-12-18 19:11:41,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:11:41,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-12-18 19:11:41,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2325, Invalid=5865, Unknown=0, NotChecked=0, Total=8190 [2023-12-18 19:11:41,168 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:11:41,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:11:41,276 INFO L93 Difference]: Finished difference Result 281 states and 377 transitions. [2023-12-18 19:11:41,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-12-18 19:11:41,277 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 259 [2023-12-18 19:11:41,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:11:41,278 INFO L225 Difference]: With dead ends: 281 [2023-12-18 19:11:41,278 INFO L226 Difference]: Without dead ends: 179 [2023-12-18 19:11:41,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2325, Invalid=5865, Unknown=0, NotChecked=0, Total=8190 [2023-12-18 19:11:41,281 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:11:41,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 218 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:11:41,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-12-18 19:11:41,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2023-12-18 19:11:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.2241379310344827) internal successors, (213), 174 states have internal predecessors, (213), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:11:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 219 transitions. [2023-12-18 19:11:41,289 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 219 transitions. Word has length 259 [2023-12-18 19:11:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:11:41,290 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 219 transitions. [2023-12-18 19:11:41,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:11:41,291 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 219 transitions. [2023-12-18 19:11:41,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-12-18 19:11:41,293 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:11:41,293 INFO L195 NwaCegarLoop]: trace histogram [59, 54, 54, 54, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:11:41,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-18 19:11:41,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-18 19:11:41,506 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:11:41,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:11:41,507 INFO L85 PathProgramCache]: Analyzing trace with hash 384793247, now seen corresponding path program 10 times [2023-12-18 19:11:41,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:11:41,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676580839] [2023-12-18 19:11:41,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:11:41,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:11:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:44,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-12-18 19:11:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:44,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2023-12-18 19:11:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:44,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2023-12-18 19:11:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 4932 trivial. 0 not checked. [2023-12-18 19:11:44,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:11:44,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676580839] [2023-12-18 19:11:44,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676580839] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:11:44,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585781181] [2023-12-18 19:11:44,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:11:44,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:44,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:11:44,397 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:11:44,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-18 19:11:44,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:11:44,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:11:44,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-18 19:11:44,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:11:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2023-12-18 19:11:45,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:11:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2023-12-18 19:11:46,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585781181] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:11:46,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:11:46,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 21, 21] total 100 [2023-12-18 19:11:46,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592088458] [2023-12-18 19:11:46,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:11:46,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-12-18 19:11:46,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:11:46,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-12-18 19:11:46,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2023-12-18 19:11:46,350 INFO L87 Difference]: Start difference. First operand 179 states and 219 transitions. Second operand has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:11:46,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:11:46,590 INFO L93 Difference]: Finished difference Result 378 states and 521 transitions. [2023-12-18 19:11:46,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-12-18 19:11:46,590 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 276 [2023-12-18 19:11:46,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:11:46,593 INFO L225 Difference]: With dead ends: 378 [2023-12-18 19:11:46,593 INFO L226 Difference]: Without dead ends: 260 [2023-12-18 19:11:46,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2023-12-18 19:11:46,596 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 442 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:11:46,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 256 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:11:46,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-12-18 19:11:46,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2023-12-18 19:11:46,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.3098039215686275) internal successors, (334), 255 states have internal predecessors, (334), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:11:46,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 340 transitions. [2023-12-18 19:11:46,605 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 340 transitions. Word has length 276 [2023-12-18 19:11:46,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:11:46,606 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 340 transitions. [2023-12-18 19:11:46,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:11:46,606 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 340 transitions. [2023-12-18 19:11:46,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-12-18 19:11:46,612 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:11:46,612 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 60, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:11:46,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-18 19:11:46,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-18 19:11:46,821 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:11:46,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:11:46,822 INFO L85 PathProgramCache]: Analyzing trace with hash 43549266, now seen corresponding path program 11 times [2023-12-18 19:11:46,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:11:46,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671404091] [2023-12-18 19:11:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:11:46,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:11:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:49,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-12-18 19:11:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:49,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2023-12-18 19:11:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:49,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2023-12-18 19:11:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:11:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 20142 trivial. 0 not checked. [2023-12-18 19:11:50,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:11:50,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671404091] [2023-12-18 19:11:50,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671404091] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:11:50,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619465134] [2023-12-18 19:11:50,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:11:50,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:11:50,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:11:50,009 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:11:50,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process Received shutdown request... [2023-12-18 19:25:52,885 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 19:25:52,885 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 19:25:53,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 [2023-12-18 19:25:54,085 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forcibly destroying the process [2023-12-18 19:25:54,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 137 [2023-12-18 19:25:54,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 19:25:54,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-18 19:25:54,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2023-12-18 19:25:54,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590434920] [2023-12-18 19:25:54,124 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-18 19:25:54,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-18 19:25:54,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:25:54,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-18 19:25:54,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-12-18 19:25:54,127 INFO L87 Difference]: Start difference. First operand 260 states and 340 transitions. Second operand has 63 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 63 states have internal predecessors, (77), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 19:25:54,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 19:25:54,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-12-18 19:25:54,130 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:25:54,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:25:54,131 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 19:25:54,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-18 19:25:54,132 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (260states) and FLOYD_HOARE automaton (currently 2 states, 63 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). [2023-12-18 19:25:54,136 INFO L445 BasicCegarLoop]: Path program histogram: [11, 1, 1, 1] [2023-12-18 19:25:54,138 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 19:25:54,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 07:25:54 BoogieIcfgContainer [2023-12-18 19:25:54,141 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 19:25:54,141 INFO L158 Benchmark]: Toolchain (without parser) took 872157.78ms. Allocated memory was 295.7MB in the beginning and 615.5MB in the end (delta: 319.8MB). Free memory was 243.6MB in the beginning and 393.1MB in the end (delta: -149.5MB). Peak memory consumption was 171.8MB. Max. memory is 8.0GB. [2023-12-18 19:25:54,141 INFO L158 Benchmark]: CDTParser took 0.57ms. Allocated memory is still 200.3MB. Free memory is still 145.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 19:25:54,142 INFO L158 Benchmark]: CACSL2BoogieTranslator took 219.27ms. Allocated memory is still 295.7MB. Free memory was 243.0MB in the beginning and 232.1MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-18 19:25:54,142 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.15ms. Allocated memory is still 295.7MB. Free memory was 232.1MB in the beginning and 230.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 19:25:54,142 INFO L158 Benchmark]: Boogie Preprocessor took 37.57ms. Allocated memory is still 295.7MB. Free memory was 230.4MB in the beginning and 228.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 19:25:54,142 INFO L158 Benchmark]: RCFGBuilder took 448.01ms. Allocated memory is still 295.7MB. Free memory was 227.9MB in the beginning and 213.7MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-18 19:25:54,143 INFO L158 Benchmark]: TraceAbstraction took 871414.08ms. Allocated memory was 295.7MB in the beginning and 615.5MB in the end (delta: 319.8MB). Free memory was 213.2MB in the beginning and 393.1MB in the end (delta: -179.9MB). Peak memory consumption was 141.4MB. Max. memory is 8.0GB. [2023-12-18 19:25:54,144 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57ms. Allocated memory is still 200.3MB. Free memory is still 145.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 219.27ms. Allocated memory is still 295.7MB. Free memory was 243.0MB in the beginning and 232.1MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 32.15ms. Allocated memory is still 295.7MB. Free memory was 232.1MB in the beginning and 230.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.57ms. Allocated memory is still 295.7MB. Free memory was 230.4MB in the beginning and 228.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 448.01ms. Allocated memory is still 295.7MB. Free memory was 227.9MB in the beginning and 213.7MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 871414.08ms. Allocated memory was 295.7MB in the beginning and 615.5MB in the end (delta: 319.8MB). Free memory was 213.2MB in the beginning and 393.1MB in the end (delta: -179.9MB). Peak memory consumption was 141.4MB. 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: 53]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 53). Cancelled while NwaCegarLoop was constructing difference of abstraction (260states) and FLOYD_HOARE automaton (currently 2 states, 63 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 871.3s, OverallIterations: 14, TraceHistogramMax: 114, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 627 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 627 mSDsluCounter, 1604 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1323 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 838 IncrementalHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 281 mSDtfsCounter, 838 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3448 GetRequests, 2997 SyntacticMatches, 0 SemanticMatches, 451 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4628 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=260occurred in iteration=13, InterpolantAutomatonStates: 405, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 4.1s SatisfiabilityAnalysisTime, 17.3s InterpolantComputationTime, 3637 NumberOfCodeBlocks, 3301 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 5104 ConstructedInterpolants, 0 QuantifiedInterpolants, 6340 SizeOfPredicates, 0 NumberOfNonLiveVariables, 6014 ConjunctsInSsa, 123 ConjunctsInUnsatCore, 37 InterpolantComputations, 3 PerfectInterpolantSequences, 99081/108079 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