/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 false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-crafted/mapsum1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 08:34:20,358 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 08:34:20,434 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 08:34:20,437 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 08:34:20,438 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 08:34:20,458 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 08:34:20,459 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 08:34:20,459 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 08:34:20,459 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 08:34:20,462 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 08:34:20,462 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 08:34:20,462 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 08:34:20,463 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 08:34:20,464 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 08:34:20,464 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 08:34:20,464 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 08:34:20,464 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 08:34:20,464 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 08:34:20,464 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 08:34:20,464 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 08:34:20,465 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 08:34:20,465 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 08:34:20,465 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 08:34:20,465 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 08:34:20,465 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 08:34:20,465 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 08:34:20,466 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 08:34:20,466 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 08:34:20,466 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 08:34:20,466 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 08:34:20,467 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 08:34:20,467 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 08:34:20,467 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 08:34:20,467 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 08:34:20,467 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 08:34:20,468 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 08:34:20,468 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 08:34:20,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 08:34:20,468 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 08:34:20,468 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 08:34:20,468 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 08:34:20,469 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 08:34:20,469 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 08:34:20,469 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 08:34:20,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 08:34:20,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 08:34:20,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 08:34:20,690 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 08:34:20,690 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 08:34:20,691 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapsum1.i [2023-12-20 08:34:21,723 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 08:34:21,878 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 08:34:21,878 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum1.i [2023-12-20 08:34:21,883 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ea6ac6aa/d95986b51373478280a2a0bf64c2de85/FLAG6cec2d14d [2023-12-20 08:34:21,893 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ea6ac6aa/d95986b51373478280a2a0bf64c2de85 [2023-12-20 08:34:21,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 08:34:21,896 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 08:34:21,897 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 08:34:21,897 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 08:34:21,900 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 08:34:21,901 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 08:34:21" (1/1) ... [2023-12-20 08:34:21,902 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46f65b26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:34:21, skipping insertion in model container [2023-12-20 08:34:21,902 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 08:34:21" (1/1) ... [2023-12-20 08:34:21,919 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 08:34:22,041 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/mapsum1.i[1300,1313] [2023-12-20 08:34:22,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 08:34:22,054 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 08:34:22,068 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/mapsum1.i[1300,1313] [2023-12-20 08:34:22,069 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 08:34:22,082 INFO L206 MainTranslator]: Completed translation [2023-12-20 08:34:22,083 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:34:22 WrapperNode [2023-12-20 08:34:22,083 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 08:34:22,084 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 08:34:22,084 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 08:34:22,084 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 08:34:22,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:34:22" (1/1) ... [2023-12-20 08:34:22,097 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:34:22" (1/1) ... [2023-12-20 08:34:22,117 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-12-20 08:34:22,117 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 08:34:22,117 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 08:34:22,118 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 08:34:22,118 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 08:34:22,125 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:34:22" (1/1) ... [2023-12-20 08:34:22,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:34:22" (1/1) ... [2023-12-20 08:34:22,127 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:34:22" (1/1) ... [2023-12-20 08:34:22,140 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2023-12-20 08:34:22,141 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:34:22" (1/1) ... [2023-12-20 08:34:22,141 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:34:22" (1/1) ... [2023-12-20 08:34:22,145 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:34:22" (1/1) ... [2023-12-20 08:34:22,147 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:34:22" (1/1) ... [2023-12-20 08:34:22,148 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:34:22" (1/1) ... [2023-12-20 08:34:22,149 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:34:22" (1/1) ... [2023-12-20 08:34:22,160 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 08:34:22,161 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 08:34:22,161 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 08:34:22,161 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 08:34:22,162 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:34:22" (1/1) ... [2023-12-20 08:34:22,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 08:34:22,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:34:22,186 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) [2023-12-20 08:34:22,200 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 [2023-12-20 08:34:22,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 08:34:22,219 INFO L130 BoogieDeclarations]: Found specification of procedure mapsum [2023-12-20 08:34:22,219 INFO L138 BoogieDeclarations]: Found implementation of procedure mapsum [2023-12-20 08:34:22,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 08:34:22,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 08:34:22,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 08:34:22,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 08:34:22,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 08:34:22,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 08:34:22,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 08:34:22,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 08:34:22,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 08:34:22,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 08:34:22,268 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 08:34:22,269 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 08:34:22,393 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 08:34:22,420 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 08:34:22,420 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-20 08:34:22,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 08:34:22 BoogieIcfgContainer [2023-12-20 08:34:22,420 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 08:34:22,422 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 08:34:22,422 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 08:34:22,424 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 08:34:22,424 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 08:34:21" (1/3) ... [2023-12-20 08:34:22,425 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a49420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 08:34:22, skipping insertion in model container [2023-12-20 08:34:22,425 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:34:22" (2/3) ... [2023-12-20 08:34:22,425 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a49420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 08:34:22, skipping insertion in model container [2023-12-20 08:34:22,425 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 08:34:22" (3/3) ... [2023-12-20 08:34:22,426 INFO L112 eAbstractionObserver]: Analyzing ICFG mapsum1.i [2023-12-20 08:34:22,439 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 08:34:22,440 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 08:34:22,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 08:34:22,475 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;@36c56643, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 08:34:22,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 08:34:22,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 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) [2023-12-20 08:34:22,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-20 08:34:22,484 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:34:22,485 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:34:22,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:34:22,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:34:22,489 INFO L85 PathProgramCache]: Analyzing trace with hash -307325283, now seen corresponding path program 1 times [2023-12-20 08:34:22,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:34:22,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807610118] [2023-12-20 08:34:22,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:22,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:34:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:22,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-20 08:34:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:22,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 08:34:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:22,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-20 08:34:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:34:22,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:34:22,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807610118] [2023-12-20 08:34:22,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807610118] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:34:22,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244752182] [2023-12-20 08:34:22,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:22,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:34:22,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:34:22,772 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) [2023-12-20 08:34:22,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 08:34:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:22,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-20 08:34:22,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:34:22,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 08:34:22,870 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 08:34:22,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244752182] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 08:34:22,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 08:34:22,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2023-12-20 08:34:22,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658116482] [2023-12-20 08:34:22,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 08:34:22,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 08:34:22,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:34:22,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 08:34:22,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 08:34:22,896 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 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) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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) [2023-12-20 08:34:22,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:34:22,922 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2023-12-20 08:34:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 08:34:22,924 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 25 [2023-12-20 08:34:22,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:34:22,929 INFO L225 Difference]: With dead ends: 38 [2023-12-20 08:34:22,929 INFO L226 Difference]: Without dead ends: 18 [2023-12-20 08:34:22,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 08:34:22,933 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:34:22,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:34:22,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-20 08:34:22,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-12-20 08:34:22,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2023-12-20 08:34:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-12-20 08:34:22,956 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 25 [2023-12-20 08:34:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:34:22,957 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-12-20 08:34:22,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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) [2023-12-20 08:34:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-12-20 08:34:22,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-20 08:34:22,958 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:34:22,959 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:34:22,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-20 08:34:23,164 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 [2023-12-20 08:34:23,166 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:34:23,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:34:23,167 INFO L85 PathProgramCache]: Analyzing trace with hash 871755747, now seen corresponding path program 1 times [2023-12-20 08:34:23,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:34:23,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137943871] [2023-12-20 08:34:23,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:23,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:34:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:23,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-20 08:34:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:23,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 08:34:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:23,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-20 08:34:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:34:23,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:34:23,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137943871] [2023-12-20 08:34:23,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137943871] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:34:23,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717950187] [2023-12-20 08:34:23,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:23,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:34:23,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:34:23,294 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) [2023-12-20 08:34:23,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 08:34:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:23,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 08:34:23,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:34:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 08:34:23,356 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 08:34:23,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717950187] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 08:34:23,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 08:34:23,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-12-20 08:34:23,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276618863] [2023-12-20 08:34:23,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 08:34:23,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 08:34:23,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:34:23,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 08:34:23,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 08:34:23,359 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. 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) [2023-12-20 08:34:23,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:34:23,382 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-12-20 08:34:23,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 08:34:23,383 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 [2023-12-20 08:34:23,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:34:23,383 INFO L225 Difference]: With dead ends: 35 [2023-12-20 08:34:23,383 INFO L226 Difference]: Without dead ends: 19 [2023-12-20 08:34:23,384 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 [2023-12-20 08:34:23,387 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:34:23,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:34:23,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-20 08:34:23,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-12-20 08:34:23,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2023-12-20 08:34:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-12-20 08:34:23,399 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 25 [2023-12-20 08:34:23,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:34:23,399 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-12-20 08:34:23,399 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) [2023-12-20 08:34:23,399 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-12-20 08:34:23,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-20 08:34:23,400 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:34:23,400 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] [2023-12-20 08:34:23,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 08:34:23,600 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 [2023-12-20 08:34:23,603 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:34:23,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:34:23,603 INFO L85 PathProgramCache]: Analyzing trace with hash -25583204, now seen corresponding path program 1 times [2023-12-20 08:34:23,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:34:23,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724894072] [2023-12-20 08:34:23,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:23,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:34:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:23,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-20 08:34:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:23,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 08:34:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:23,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 08:34:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:34:23,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:34:23,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724894072] [2023-12-20 08:34:23,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724894072] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:34:23,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586417546] [2023-12-20 08:34:23,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:23,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:34:23,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:34:23,706 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) [2023-12-20 08:34:23,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 08:34:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:23,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 08:34:23,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:34:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-20 08:34:23,806 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 08:34:23,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586417546] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 08:34:23,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 08:34:23,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-12-20 08:34:23,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739250444] [2023-12-20 08:34:23,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 08:34:23,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 08:34:23,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:34:23,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 08:34:23,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 08:34:23,808 INFO L87 Difference]: Start difference. First operand 19 states and 23 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) [2023-12-20 08:34:23,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:34:23,826 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2023-12-20 08:34:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 08:34:23,826 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 [2023-12-20 08:34:23,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:34:23,827 INFO L225 Difference]: With dead ends: 34 [2023-12-20 08:34:23,827 INFO L226 Difference]: Without dead ends: 20 [2023-12-20 08:34:23,828 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 [2023-12-20 08:34:23,830 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:34:23,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:34:23,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-20 08:34:23,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-20 08:34:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2023-12-20 08:34:23,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-12-20 08:34:23,842 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 26 [2023-12-20 08:34:23,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:34:23,843 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-12-20 08:34:23,844 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) [2023-12-20 08:34:23,845 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-12-20 08:34:23,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-20 08:34:23,845 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:34:23,845 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:34:23,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 08:34:24,052 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 [2023-12-20 08:34:24,053 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:34:24,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:34:24,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1557288968, now seen corresponding path program 1 times [2023-12-20 08:34:24,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:34:24,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572985346] [2023-12-20 08:34:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:24,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:34:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:24,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-20 08:34:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:24,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-20 08:34:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:24,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 08:34:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-20 08:34:24,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:34:24,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572985346] [2023-12-20 08:34:24,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572985346] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:34:24,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795206957] [2023-12-20 08:34:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:24,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:34:24,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:34:24,130 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) [2023-12-20 08:34:24,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 08:34:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:24,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 08:34:24,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:34:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-20 08:34:24,210 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 08:34:24,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795206957] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 08:34:24,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 08:34:24,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-12-20 08:34:24,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454732513] [2023-12-20 08:34:24,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 08:34:24,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 08:34:24,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:34:24,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 08:34:24,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 08:34:24,211 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2023-12-20 08:34:24,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:34:24,228 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2023-12-20 08:34:24,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 08:34:24,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 29 [2023-12-20 08:34:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:34:24,229 INFO L225 Difference]: With dead ends: 32 [2023-12-20 08:34:24,229 INFO L226 Difference]: Without dead ends: 21 [2023-12-20 08:34:24,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 08:34:24,233 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 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 [2023-12-20 08:34:24,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:34:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-20 08:34:24,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-20 08:34:24,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2023-12-20 08:34:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-12-20 08:34:24,240 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 29 [2023-12-20 08:34:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:34:24,252 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-12-20 08:34:24,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2023-12-20 08:34:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-12-20 08:34:24,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-20 08:34:24,253 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:34:24,253 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:34:24,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 08:34:24,453 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 [2023-12-20 08:34:24,454 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:34:24,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:34:24,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1460044313, now seen corresponding path program 1 times [2023-12-20 08:34:24,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:34:24,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177704011] [2023-12-20 08:34:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:24,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:34:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:24,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-20 08:34:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:24,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-20 08:34:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:24,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 08:34:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-20 08:34:24,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:34:24,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177704011] [2023-12-20 08:34:24,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177704011] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:34:24,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787300330] [2023-12-20 08:34:24,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:24,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:34:24,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:34:24,539 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) [2023-12-20 08:34:24,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 08:34:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:24,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 08:34:24,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:34:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-20 08:34:24,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:34:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-20 08:34:24,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787300330] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:34:24,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:34:24,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-12-20 08:34:24,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704173499] [2023-12-20 08:34:24,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:34:24,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 08:34:24,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:34:24,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 08:34:24,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-20 08:34:24,659 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2023-12-20 08:34:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:34:24,686 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-12-20 08:34:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 08:34:24,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 30 [2023-12-20 08:34:24,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:34:24,687 INFO L225 Difference]: With dead ends: 42 [2023-12-20 08:34:24,687 INFO L226 Difference]: Without dead ends: 24 [2023-12-20 08:34:24,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-20 08:34:24,688 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:34:24,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:34:24,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-20 08:34:24,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-20 08:34:24,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 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) [2023-12-20 08:34:24,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-12-20 08:34:24,694 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2023-12-20 08:34:24,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:34:24,695 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-12-20 08:34:24,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2023-12-20 08:34:24,695 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-12-20 08:34:24,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-20 08:34:24,697 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:34:24,697 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:34:24,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-20 08:34:24,901 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 [2023-12-20 08:34:24,902 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:34:24,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:34:24,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1621992672, now seen corresponding path program 2 times [2023-12-20 08:34:24,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:34:24,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626171329] [2023-12-20 08:34:24,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:24,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:34:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:24,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 08:34:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:24,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-12-20 08:34:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:24,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-20 08:34:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-20 08:34:25,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:34:25,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626171329] [2023-12-20 08:34:25,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626171329] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:34:25,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619290334] [2023-12-20 08:34:25,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:34:25,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:34:25,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:34:25,001 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) [2023-12-20 08:34:25,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 08:34:25,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:34:25,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:34:25,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 08:34:25,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:34:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-20 08:34:25,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:34:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-20 08:34:25,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619290334] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:34:25,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:34:25,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-12-20 08:34:25,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132881303] [2023-12-20 08:34:25,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:34:25,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 08:34:25,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:34:25,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 08:34:25,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-20 08:34:25,180 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 08:34:25,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:34:25,218 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2023-12-20 08:34:25,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 08:34:25,218 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 33 [2023-12-20 08:34:25,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:34:25,219 INFO L225 Difference]: With dead ends: 49 [2023-12-20 08:34:25,219 INFO L226 Difference]: Without dead ends: 31 [2023-12-20 08:34:25,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-20 08:34:25,220 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:34:25,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:34:25,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-20 08:34:25,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-20 08:34:25,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 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) [2023-12-20 08:34:25,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-12-20 08:34:25,225 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 33 [2023-12-20 08:34:25,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:34:25,225 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-12-20 08:34:25,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 08:34:25,228 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-12-20 08:34:25,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-20 08:34:25,228 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:34:25,229 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:34:25,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 08:34:25,433 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 [2023-12-20 08:34:25,434 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:34:25,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:34:25,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1372615532, now seen corresponding path program 3 times [2023-12-20 08:34:25,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:34:25,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814572341] [2023-12-20 08:34:25,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:25,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:34:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:25,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 08:34:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:25,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 08:34:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:25,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-12-20 08:34:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-12-20 08:34:25,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:34:25,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814572341] [2023-12-20 08:34:25,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814572341] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:34:25,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193238524] [2023-12-20 08:34:25,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:34:25,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:34:25,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:34:25,508 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) [2023-12-20 08:34:25,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 08:34:25,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-20 08:34:25,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:34:25,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 08:34:25,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:34:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-20 08:34:25,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:34:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-20 08:34:25,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193238524] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:34:25,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:34:25,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-12-20 08:34:25,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291946481] [2023-12-20 08:34:25,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:34:25,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-20 08:34:25,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:34:25,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-20 08:34:25,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-12-20 08:34:25,630 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 08:34:25,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:34:25,668 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2023-12-20 08:34:25,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 08:34:25,668 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2023-12-20 08:34:25,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:34:25,669 INFO L225 Difference]: With dead ends: 53 [2023-12-20 08:34:25,669 INFO L226 Difference]: Without dead ends: 36 [2023-12-20 08:34:25,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-12-20 08:34:25,670 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:34:25,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:34:25,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-20 08:34:25,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-20 08:34:25,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 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) [2023-12-20 08:34:25,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-12-20 08:34:25,673 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2023-12-20 08:34:25,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:34:25,673 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-12-20 08:34:25,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 08:34:25,674 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-12-20 08:34:25,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-20 08:34:25,674 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:34:25,674 INFO L195 NwaCegarLoop]: trace histogram [18, 10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:34:25,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 08:34:25,874 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 [2023-12-20 08:34:25,875 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:34:25,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:34:25,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1486823267, now seen corresponding path program 4 times [2023-12-20 08:34:25,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:34:25,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235704278] [2023-12-20 08:34:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:25,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:34:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:26,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 08:34:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:26,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-20 08:34:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:26,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-12-20 08:34:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-12-20 08:34:26,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:34:26,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235704278] [2023-12-20 08:34:26,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235704278] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:34:26,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227810809] [2023-12-20 08:34:26,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:34:26,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:34:26,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:34:26,116 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) [2023-12-20 08:34:26,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 08:34:26,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:34:26,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:34:26,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 08:34:26,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:34:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-12-20 08:34:26,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:34:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-12-20 08:34:26,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227810809] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:34:26,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:34:26,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2023-12-20 08:34:26,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026132659] [2023-12-20 08:34:26,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:34:26,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-20 08:34:26,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:34:26,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-20 08:34:26,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-20 08:34:26,400 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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) [2023-12-20 08:34:26,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:34:26,437 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2023-12-20 08:34:26,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-20 08:34:26,439 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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 55 [2023-12-20 08:34:26,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:34:26,439 INFO L225 Difference]: With dead ends: 72 [2023-12-20 08:34:26,439 INFO L226 Difference]: Without dead ends: 48 [2023-12-20 08:34:26,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-20 08:34:26,440 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:34:26,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:34:26,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-20 08:34:26,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-12-20 08:34:26,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 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) [2023-12-20 08:34:26,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2023-12-20 08:34:26,444 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 55 [2023-12-20 08:34:26,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:34:26,444 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2023-12-20 08:34:26,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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) [2023-12-20 08:34:26,445 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2023-12-20 08:34:26,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-20 08:34:26,445 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:34:26,445 INFO L195 NwaCegarLoop]: trace histogram [22, 18, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:34:26,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 08:34:26,653 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 [2023-12-20 08:34:26,653 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:34:26,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:34:26,654 INFO L85 PathProgramCache]: Analyzing trace with hash -795614685, now seen corresponding path program 5 times [2023-12-20 08:34:26,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:34:26,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222674631] [2023-12-20 08:34:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:26,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:34:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:27,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-20 08:34:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:27,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-20 08:34:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:27,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-12-20 08:34:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-12-20 08:34:27,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:34:27,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222674631] [2023-12-20 08:34:27,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222674631] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:34:27,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108883166] [2023-12-20 08:34:27,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:34:27,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:34:27,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:34:27,139 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) [2023-12-20 08:34:27,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 08:34:28,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-12-20 08:34:28,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:34:28,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 08:34:28,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:34:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 104 proven. 3 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2023-12-20 08:34:28,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:34:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2023-12-20 08:34:28,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108883166] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:34:28,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:34:28,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 5, 5] total 31 [2023-12-20 08:34:28,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467596408] [2023-12-20 08:34:28,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:34:28,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-20 08:34:28,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:34:28,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-20 08:34:28,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2023-12-20 08:34:28,296 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 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) [2023-12-20 08:34:28,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:34:28,333 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2023-12-20 08:34:28,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-20 08:34:28,334 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 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 67 [2023-12-20 08:34:28,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:34:28,335 INFO L225 Difference]: With dead ends: 77 [2023-12-20 08:34:28,335 INFO L226 Difference]: Without dead ends: 53 [2023-12-20 08:34:28,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2023-12-20 08:34:28,336 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:34:28,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:34:28,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-20 08:34:28,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-12-20 08:34:28,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 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) [2023-12-20 08:34:28,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2023-12-20 08:34:28,340 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 67 [2023-12-20 08:34:28,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:34:28,340 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2023-12-20 08:34:28,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 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) [2023-12-20 08:34:28,340 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2023-12-20 08:34:28,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-20 08:34:28,341 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:34:28,341 INFO L195 NwaCegarLoop]: trace histogram [23, 18, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:34:28,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-20 08:34:28,541 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 [2023-12-20 08:34:28,541 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:34:28,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:34:28,542 INFO L85 PathProgramCache]: Analyzing trace with hash -566359460, now seen corresponding path program 6 times [2023-12-20 08:34:28,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:34:28,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758481770] [2023-12-20 08:34:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:28,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:34:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:29,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-20 08:34:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:29,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-20 08:34:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:29,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 08:34:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2023-12-20 08:34:29,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:34:29,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758481770] [2023-12-20 08:34:29,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758481770] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:34:29,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190371634] [2023-12-20 08:34:29,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:34:29,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:34:29,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:34:29,108 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) [2023-12-20 08:34:29,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 08:34:29,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-20 08:34:29,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:34:29,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 08:34:29,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:34:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2023-12-20 08:34:29,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:34:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2023-12-20 08:34:29,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190371634] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:34:29,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:34:29,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 40 [2023-12-20 08:34:29,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554090036] [2023-12-20 08:34:29,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:34:29,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-20 08:34:29,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:34:29,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-20 08:34:29,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2023-12-20 08:34:29,584 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 states have internal predecessors, (64), 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) [2023-12-20 08:34:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:34:29,651 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2023-12-20 08:34:29,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-20 08:34:29,652 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 states have internal predecessors, (64), 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 72 [2023-12-20 08:34:29,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:34:29,652 INFO L225 Difference]: With dead ends: 90 [2023-12-20 08:34:29,652 INFO L226 Difference]: Without dead ends: 62 [2023-12-20 08:34:29,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2023-12-20 08:34:29,653 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:34:29,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:34:29,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-20 08:34:29,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-12-20 08:34:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 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) [2023-12-20 08:34:29,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2023-12-20 08:34:29,658 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 72 [2023-12-20 08:34:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:34:29,658 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2023-12-20 08:34:29,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 states have internal predecessors, (64), 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) [2023-12-20 08:34:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2023-12-20 08:34:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-12-20 08:34:29,659 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:34:29,659 INFO L195 NwaCegarLoop]: trace histogram [42, 24, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:34:29,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-20 08:34:29,868 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 [2023-12-20 08:34:29,868 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:34:29,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:34:29,869 INFO L85 PathProgramCache]: Analyzing trace with hash 206445699, now seen corresponding path program 7 times [2023-12-20 08:34:29,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:34:29,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44148560] [2023-12-20 08:34:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:29,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:34:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:30,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-20 08:34:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:30,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 08:34:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:30,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-12-20 08:34:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2023-12-20 08:34:30,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:34:30,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44148560] [2023-12-20 08:34:30,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44148560] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:34:30,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762884580] [2023-12-20 08:34:30,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:34:30,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:34:30,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:34:30,434 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) [2023-12-20 08:34:30,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 08:34:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:30,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-20 08:34:30,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:34:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2023-12-20 08:34:30,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:34:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2023-12-20 08:34:31,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762884580] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:34:31,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:34:31,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 27] total 53 [2023-12-20 08:34:31,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989731879] [2023-12-20 08:34:31,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:34:31,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-20 08:34:31,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:34:31,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-20 08:34:31,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-12-20 08:34:31,197 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 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) [2023-12-20 08:34:31,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:34:31,245 INFO L93 Difference]: Finished difference Result 124 states and 157 transitions. [2023-12-20 08:34:31,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-12-20 08:34:31,245 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 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 97 [2023-12-20 08:34:31,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:34:31,246 INFO L225 Difference]: With dead ends: 124 [2023-12-20 08:34:31,246 INFO L226 Difference]: Without dead ends: 88 [2023-12-20 08:34:31,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-12-20 08:34:31,247 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:34:31,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:34:31,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-20 08:34:31,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-12-20 08:34:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 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) [2023-12-20 08:34:31,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2023-12-20 08:34:31,252 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 97 [2023-12-20 08:34:31,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:34:31,252 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2023-12-20 08:34:31,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 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) [2023-12-20 08:34:31,252 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2023-12-20 08:34:31,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-20 08:34:31,253 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:34:31,253 INFO L195 NwaCegarLoop]: trace histogram [50, 42, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:34:31,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 08:34:31,459 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 [2023-12-20 08:34:31,459 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:34:31,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:34:31,460 INFO L85 PathProgramCache]: Analyzing trace with hash -694462173, now seen corresponding path program 8 times [2023-12-20 08:34:31,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:34:31,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515353348] [2023-12-20 08:34:31,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:31,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:34:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:33,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-12-20 08:34:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:33,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-12-20 08:34:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:33,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 08:34:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2023-12-20 08:34:33,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:34:33,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515353348] [2023-12-20 08:34:33,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515353348] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:34:33,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855272392] [2023-12-20 08:34:33,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:34:33,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:34:33,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:34:33,072 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) [2023-12-20 08:34:33,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 08:34:33,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:34:33,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:34:33,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-20 08:34:33,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:34:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2023-12-20 08:34:33,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:34:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2023-12-20 08:34:35,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855272392] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:34:35,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:34:35,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 53] total 103 [2023-12-20 08:34:35,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004435427] [2023-12-20 08:34:35,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:34:35,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2023-12-20 08:34:35,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:34:35,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2023-12-20 08:34:35,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2023-12-20 08:34:35,715 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 103 states, 103 states have (on average 1.1844660194174756) internal successors, (122), 103 states have internal predecessors, (122), 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) [2023-12-20 08:34:35,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:34:35,828 INFO L93 Difference]: Finished difference Result 174 states and 231 transitions. [2023-12-20 08:34:35,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-12-20 08:34:35,828 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.1844660194174756) internal successors, (122), 103 states have internal predecessors, (122), 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 123 [2023-12-20 08:34:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:34:35,829 INFO L225 Difference]: With dead ends: 174 [2023-12-20 08:34:35,829 INFO L226 Difference]: Without dead ends: 138 [2023-12-20 08:34:35,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2023-12-20 08:34:35,833 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:34:35,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:34:35,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-12-20 08:34:35,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2023-12-20 08:34:35,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 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) [2023-12-20 08:34:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2023-12-20 08:34:35,849 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 123 [2023-12-20 08:34:35,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:34:35,849 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2023-12-20 08:34:35,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.1844660194174756) internal successors, (122), 103 states have internal predecessors, (122), 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) [2023-12-20 08:34:35,850 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2023-12-20 08:34:35,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-12-20 08:34:35,852 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:34:35,852 INFO L195 NwaCegarLoop]: trace histogram [100, 42, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:34:35,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-20 08:34:36,059 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 [2023-12-20 08:34:36,059 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:34:36,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:34:36,059 INFO L85 PathProgramCache]: Analyzing trace with hash 764728131, now seen corresponding path program 9 times [2023-12-20 08:34:36,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:34:36,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991580676] [2023-12-20 08:34:36,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:36,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:34:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:36,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-12-20 08:34:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:36,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2023-12-20 08:34:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:36,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2023-12-20 08:34:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6070 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6049 trivial. 0 not checked. [2023-12-20 08:34:36,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:34:36,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991580676] [2023-12-20 08:34:36,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991580676] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:34:36,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759527482] [2023-12-20 08:34:36,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:34:36,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:34:36,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:34:36,449 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) [2023-12-20 08:34:36,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-20 08:34:36,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-20 08:34:36,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:34:36,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 08:34:36,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:34:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6070 backedges. 456 proven. 21 refuted. 0 times theorem prover too weak. 5593 trivial. 0 not checked. [2023-12-20 08:34:36,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:34:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6070 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6049 trivial. 0 not checked. [2023-12-20 08:34:36,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759527482] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:34:36,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:34:36,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-12-20 08:34:36,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069739584] [2023-12-20 08:34:36,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:34:36,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 08:34:36,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:34:36,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 08:34:36,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-12-20 08:34:36,777 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 08:34:36,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:34:36,799 INFO L93 Difference]: Finished difference Result 170 states and 182 transitions. [2023-12-20 08:34:36,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-20 08:34:36,799 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 173 [2023-12-20 08:34:36,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:34:36,801 INFO L225 Difference]: With dead ends: 170 [2023-12-20 08:34:36,801 INFO L226 Difference]: Without dead ends: 146 [2023-12-20 08:34:36,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-12-20 08:34:36,802 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:34:36,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:34:36,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-12-20 08:34:36,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2023-12-20 08:34:36,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 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) [2023-12-20 08:34:36,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2023-12-20 08:34:36,809 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 173 [2023-12-20 08:34:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:34:36,810 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2023-12-20 08:34:36,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 08:34:36,810 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2023-12-20 08:34:36,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-12-20 08:34:36,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:34:36,812 INFO L195 NwaCegarLoop]: trace histogram [100, 42, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:34:36,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-20 08:34:37,012 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 [2023-12-20 08:34:37,013 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:34:37,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:34:37,013 INFO L85 PathProgramCache]: Analyzing trace with hash -540002365, now seen corresponding path program 10 times [2023-12-20 08:34:37,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:34:37,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310961527] [2023-12-20 08:34:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:37,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:34:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:37,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-12-20 08:34:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:37,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2023-12-20 08:34:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:37,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2023-12-20 08:34:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6154 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 6049 trivial. 0 not checked. [2023-12-20 08:34:37,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:34:37,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310961527] [2023-12-20 08:34:37,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310961527] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:34:37,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312906814] [2023-12-20 08:34:37,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:34:37,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:34:37,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:34:37,589 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) [2023-12-20 08:34:37,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-20 08:34:37,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:34:37,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:34:37,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 1329 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 08:34:37,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:34:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6154 backedges. 452 proven. 105 refuted. 0 times theorem prover too weak. 5597 trivial. 0 not checked. [2023-12-20 08:34:38,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:34:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6154 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 5595 trivial. 0 not checked. [2023-12-20 08:34:38,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312906814] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:34:38,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:34:38,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2023-12-20 08:34:38,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675405037] [2023-12-20 08:34:38,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:34:38,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-20 08:34:38,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:34:38,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-20 08:34:38,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2023-12-20 08:34:38,378 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 states have internal predecessors, (69), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 08:34:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:34:38,457 INFO L93 Difference]: Finished difference Result 205 states and 231 transitions. [2023-12-20 08:34:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-12-20 08:34:38,458 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 states have internal predecessors, (69), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 181 [2023-12-20 08:34:38,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:34:38,458 INFO L225 Difference]: With dead ends: 205 [2023-12-20 08:34:38,458 INFO L226 Difference]: Without dead ends: 163 [2023-12-20 08:34:38,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2023-12-20 08:34:38,459 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:34:38,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 133 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:34:38,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-12-20 08:34:38,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2023-12-20 08:34:38,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 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) [2023-12-20 08:34:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 167 transitions. [2023-12-20 08:34:38,465 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 167 transitions. Word has length 181 [2023-12-20 08:34:38,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:34:38,465 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 167 transitions. [2023-12-20 08:34:38,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 states have internal predecessors, (69), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 08:34:38,466 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 167 transitions. [2023-12-20 08:34:38,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-12-20 08:34:38,467 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:34:38,467 INFO L195 NwaCegarLoop]: trace histogram [100, 90, 15, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:34:38,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-20 08:34:38,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:34:38,674 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:34:38,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:34:38,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1108328724, now seen corresponding path program 11 times [2023-12-20 08:34:38,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:34:38,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644834666] [2023-12-20 08:34:38,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:34:38,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:34:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:39,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-12-20 08:34:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:39,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-12-20 08:34:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:39,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2023-12-20 08:34:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:34:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9457 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 9337 trivial. 0 not checked. [2023-12-20 08:34:39,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:34:39,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644834666] [2023-12-20 08:34:39,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644834666] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:34:39,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154684987] [2023-12-20 08:34:39,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:34:39,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:34:39,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:34:39,282 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:34:39,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process Received shutdown request... [2023-12-20 08:49:04,560 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 08:49:04,560 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 [2023-12-20 08:49:05,569 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 [2023-12-20 08:49:05,761 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forcibly destroying the process [2023-12-20 08:49:05,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 08:49:05,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 08:49:05,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-20 08:49:05,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199082237] [2023-12-20 08:49:05,786 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 08:49:05,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-20 08:49:05,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:49:05,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-20 08:49:05,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2023-12-20 08:49:05,787 INFO L87 Difference]: Start difference. First operand 163 states and 167 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 08:49:05,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 08:49:05,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2023-12-20 08:49:05,788 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 [2023-12-20 08:49:05,789 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] [2023-12-20 08:49:05,789 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 08:49:05,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-20 08:49:05,790 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (163states) and FLOYD_HOARE automaton (currently 2 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). [2023-12-20 08:49:05,793 INFO L445 BasicCegarLoop]: Path program histogram: [11, 1, 1, 1, 1] [2023-12-20 08:49:05,794 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 08:49:05,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 08:49:05 BoogieIcfgContainer [2023-12-20 08:49:05,796 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 08:49:05,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 137 [2023-12-20 08:49:05,799 INFO L158 Benchmark]: Toolchain (without parser) took 883899.70ms. Allocated memory was 253.8MB in the beginning and 448.8MB in the end (delta: 195.0MB). Free memory was 201.5MB in the beginning and 266.8MB in the end (delta: -65.2MB). Peak memory consumption was 130.3MB. Max. memory is 8.0GB. [2023-12-20 08:49:05,800 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 210.8MB. Free memory is still 158.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 08:49:05,801 INFO L158 Benchmark]: CACSL2BoogieTranslator took 186.27ms. Allocated memory is still 253.8MB. Free memory was 201.5MB in the beginning and 190.0MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-20 08:49:05,801 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.07ms. Allocated memory is still 253.8MB. Free memory was 190.0MB in the beginning and 188.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-20 08:49:05,801 INFO L158 Benchmark]: Boogie Preprocessor took 42.94ms. Allocated memory is still 253.8MB. Free memory was 188.4MB in the beginning and 186.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 08:49:05,801 INFO L158 Benchmark]: RCFGBuilder took 259.38ms. Allocated memory is still 253.8MB. Free memory was 186.3MB in the beginning and 172.2MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-20 08:49:05,802 INFO L158 Benchmark]: TraceAbstraction took 883373.68ms. Allocated memory was 253.8MB in the beginning and 448.8MB in the end (delta: 195.0MB). Free memory was 171.7MB in the beginning and 266.8MB in the end (delta: -95.1MB). Peak memory consumption was 101.0MB. Max. memory is 8.0GB. [2023-12-20 08:49:05,804 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 210.8MB. Free memory is still 158.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 186.27ms. Allocated memory is still 253.8MB. Free memory was 201.5MB in the beginning and 190.0MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 33.07ms. Allocated memory is still 253.8MB. Free memory was 190.0MB in the beginning and 188.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 42.94ms. Allocated memory is still 253.8MB. Free memory was 188.4MB in the beginning and 186.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 259.38ms. Allocated memory is still 253.8MB. Free memory was 186.3MB in the beginning and 172.2MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 883373.68ms. Allocated memory was 253.8MB in the beginning and 448.8MB in the end (delta: 195.0MB). Free memory was 171.7MB in the beginning and 266.8MB in the end (delta: -95.1MB). Peak memory consumption was 101.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 53). Cancelled while NwaCegarLoop was constructing difference of abstraction (163states) and FLOYD_HOARE automaton (currently 2 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 883.3s, OverallIterations: 15, TraceHistogramMax: 100, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 978 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 739 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 658 IncrementalHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 239 mSDtfsCounter, 658 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2126 GetRequests, 1770 SyntacticMatches, 2 SemanticMatches, 354 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=163occurred in iteration=14, InterpolantAutomatonStates: 353, 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, 14 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 9.6s InterpolantComputationTime, 2186 NumberOfCodeBlocks, 2002 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 3020 ConstructedInterpolants, 0 QuantifiedInterpolants, 3920 SizeOfPredicates, 0 NumberOfNonLiveVariables, 4930 ConjunctsInSsa, 146 ConjunctsInUnsatCore, 39 InterpolantComputations, 4 PerfectInterpolantSequences, 54904/61388 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