/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 17:32:09,397 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 17:32:09,492 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 17:32:09,497 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 17:32:09,497 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 17:32:09,526 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 17:32:09,527 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 17:32:09,527 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 17:32:09,528 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 17:32:09,531 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 17:32:09,532 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 17:32:09,532 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 17:32:09,533 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 17:32:09,534 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 17:32:09,534 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 17:32:09,534 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 17:32:09,535 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 17:32:09,535 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 17:32:09,535 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 17:32:09,536 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 17:32:09,537 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 17:32:09,537 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 17:32:09,537 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 17:32:09,537 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 17:32:09,537 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 17:32:09,538 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 17:32:09,538 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 17:32:09,538 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 17:32:09,539 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 17:32:09,539 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 17:32:09,540 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 17:32:09,540 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 17:32:09,540 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 17:32:09,540 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 17:32:09,540 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 17:32:09,540 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 17:32:09,541 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 17:32:09,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 17:32:09,541 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 17:32:09,541 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 17:32:09,541 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 17:32:09,541 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 17:32:09,542 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 17:32:09,542 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 17:32:09,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 17:32:09,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 17:32:09,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 17:32:09,782 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 17:32:09,783 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 17:32:09,783 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2023-12-19 17:32:10,939 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 17:32:11,116 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 17:32:11,117 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2023-12-19 17:32:11,124 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a9182ff0/25b704aa9b7c4fa69681a9e2560cb69a/FLAG246db9091 [2023-12-19 17:32:11,136 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a9182ff0/25b704aa9b7c4fa69681a9e2560cb69a [2023-12-19 17:32:11,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 17:32:11,143 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 17:32:11,146 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 17:32:11,146 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 17:32:11,151 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 17:32:11,151 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 05:32:11" (1/1) ... [2023-12-19 17:32:11,152 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64fd4d66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:32:11, skipping insertion in model container [2023-12-19 17:32:11,152 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 05:32:11" (1/1) ... [2023-12-19 17:32:11,178 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 17:32:11,308 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i[882,895] [2023-12-19 17:32:11,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 17:32:11,357 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 17:32:11,368 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i[882,895] [2023-12-19 17:32:11,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 17:32:11,397 INFO L206 MainTranslator]: Completed translation [2023-12-19 17:32:11,398 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:32:11 WrapperNode [2023-12-19 17:32:11,398 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 17:32:11,399 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 17:32:11,399 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 17:32:11,399 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 17:32:11,403 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:32:11" (1/1) ... [2023-12-19 17:32:11,411 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:32:11" (1/1) ... [2023-12-19 17:32:11,431 INFO L138 Inliner]: procedures = 42, calls = 28, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 146 [2023-12-19 17:32:11,431 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 17:32:11,432 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 17:32:11,432 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 17:32:11,432 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 17:32:11,440 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:32:11" (1/1) ... [2023-12-19 17:32:11,441 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:32:11" (1/1) ... [2023-12-19 17:32:11,443 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:32:11" (1/1) ... [2023-12-19 17:32:11,453 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 10, 1]. 77 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 3 writes are split as follows [0, 2, 1]. [2023-12-19 17:32:11,454 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:32:11" (1/1) ... [2023-12-19 17:32:11,454 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:32:11" (1/1) ... [2023-12-19 17:32:11,460 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:32:11" (1/1) ... [2023-12-19 17:32:11,463 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:32:11" (1/1) ... [2023-12-19 17:32:11,465 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:32:11" (1/1) ... [2023-12-19 17:32:11,466 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:32:11" (1/1) ... [2023-12-19 17:32:11,468 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 17:32:11,469 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 17:32:11,469 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 17:32:11,469 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 17:32:11,470 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:32:11" (1/1) ... [2023-12-19 17:32:11,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 17:32:11,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:32:11,517 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) [2023-12-19 17:32:11,535 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 [2023-12-19 17:32:11,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 17:32:11,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-19 17:32:11,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-19 17:32:11,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-19 17:32:11,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-19 17:32:11,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-19 17:32:11,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-19 17:32:11,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-19 17:32:11,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 17:32:11,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-19 17:32:11,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-19 17:32:11,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 17:32:11,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 17:32:11,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-19 17:32:11,614 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 17:32:11,616 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 17:32:11,786 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 17:32:11,834 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 17:32:11,834 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-19 17:32:11,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:32:11 BoogieIcfgContainer [2023-12-19 17:32:11,835 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 17:32:11,836 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 17:32:11,837 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 17:32:11,839 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 17:32:11,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 05:32:11" (1/3) ... [2023-12-19 17:32:11,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45efb287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 05:32:11, skipping insertion in model container [2023-12-19 17:32:11,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:32:11" (2/3) ... [2023-12-19 17:32:11,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45efb287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 05:32:11, skipping insertion in model container [2023-12-19 17:32:11,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:32:11" (3/3) ... [2023-12-19 17:32:11,842 INFO L112 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2023-12-19 17:32:11,855 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 17:32:11,856 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 17:32:11,891 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 17:32:11,896 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;@5ed7d415, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 17:32:11,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 17:32:11,902 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:11,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-19 17:32:11,907 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:32:11,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:32:11,908 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:32:11,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:32:11,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1212065736, now seen corresponding path program 1 times [2023-12-19 17:32:11,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:32:11,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094688264] [2023-12-19 17:32:11,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:11,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:32:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:32:12,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:32:12,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094688264] [2023-12-19 17:32:12,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094688264] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:32:12,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 17:32:12,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 17:32:12,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201264788] [2023-12-19 17:32:12,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:32:12,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 17:32:12,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:32:12,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 17:32:12,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 17:32:12,186 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:12,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:32:12,256 INFO L93 Difference]: Finished difference Result 59 states and 93 transitions. [2023-12-19 17:32:12,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 17:32:12,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-19 17:32:12,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:32:12,264 INFO L225 Difference]: With dead ends: 59 [2023-12-19 17:32:12,265 INFO L226 Difference]: Without dead ends: 28 [2023-12-19 17:32:12,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 17:32:12,270 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:32:12,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 17:32:12,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-19 17:32:12,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-12-19 17:32:12,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:12,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2023-12-19 17:32:12,296 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 17 [2023-12-19 17:32:12,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:32:12,296 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2023-12-19 17:32:12,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:12,297 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2023-12-19 17:32:12,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-19 17:32:12,297 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:32:12,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:32:12,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-19 17:32:12,298 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:32:12,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:32:12,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1222889611, now seen corresponding path program 1 times [2023-12-19 17:32:12,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:32:12,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269156738] [2023-12-19 17:32:12,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:12,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:32:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:32:12,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:32:12,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269156738] [2023-12-19 17:32:12,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269156738] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:32:12,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57851346] [2023-12-19 17:32:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:12,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:32:12,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:32:12,408 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) [2023-12-19 17:32:12,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 17:32:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:12,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 17:32:12,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:32:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 17:32:12,544 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 17:32:12,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57851346] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:32:12,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 17:32:12,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-19 17:32:12,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394536087] [2023-12-19 17:32:12,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:32:12,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 17:32:12,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:32:12,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 17:32:12,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-19 17:32:12,551 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:12,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:32:12,583 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2023-12-19 17:32:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 17:32:12,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-19 17:32:12,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:32:12,586 INFO L225 Difference]: With dead ends: 52 [2023-12-19 17:32:12,586 INFO L226 Difference]: Without dead ends: 29 [2023-12-19 17:32:12,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-19 17:32:12,588 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:32:12,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 17:32:12,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-19 17:32:12,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-12-19 17:32:12,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:12,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2023-12-19 17:32:12,592 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 22 [2023-12-19 17:32:12,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:32:12,593 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2023-12-19 17:32:12,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:12,593 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2023-12-19 17:32:12,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-19 17:32:12,593 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:32:12,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:32:12,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-19 17:32:12,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:32:12,798 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:32:12,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:32:12,799 INFO L85 PathProgramCache]: Analyzing trace with hash 2060960435, now seen corresponding path program 1 times [2023-12-19 17:32:12,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:32:12,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945708424] [2023-12-19 17:32:12,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:12,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:32:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:32:12,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:32:12,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945708424] [2023-12-19 17:32:12,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945708424] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:32:12,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133734982] [2023-12-19 17:32:12,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:12,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:32:12,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:32:12,890 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) [2023-12-19 17:32:12,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 17:32:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:12,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-19 17:32:12,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:32:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 17:32:13,048 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 17:32:13,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133734982] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:32:13,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 17:32:13,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2023-12-19 17:32:13,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324647731] [2023-12-19 17:32:13,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:32:13,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 17:32:13,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:32:13,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 17:32:13,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-19 17:32:13,051 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:13,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:32:13,150 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2023-12-19 17:32:13,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 17:32:13,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-19 17:32:13,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:32:13,152 INFO L225 Difference]: With dead ends: 74 [2023-12-19 17:32:13,153 INFO L226 Difference]: Without dead ends: 50 [2023-12-19 17:32:13,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-12-19 17:32:13,158 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:32:13,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 85 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 17:32:13,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-19 17:32:13,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 33. [2023-12-19 17:32:13,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:13,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-12-19 17:32:13,165 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 22 [2023-12-19 17:32:13,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:32:13,165 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-12-19 17:32:13,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:13,166 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-12-19 17:32:13,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-19 17:32:13,166 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:32:13,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:32:13,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-19 17:32:13,367 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,SelfDestructingSolverStorable2 [2023-12-19 17:32:13,367 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:32:13,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:32:13,368 INFO L85 PathProgramCache]: Analyzing trace with hash 2062867059, now seen corresponding path program 1 times [2023-12-19 17:32:13,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:32:13,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355923381] [2023-12-19 17:32:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:13,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:32:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:32:13,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:32:13,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355923381] [2023-12-19 17:32:13,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355923381] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:32:13,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264257196] [2023-12-19 17:32:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:13,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:32:13,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:32:13,458 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) [2023-12-19 17:32:13,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 17:32:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:13,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-19 17:32:13,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:32:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:32:13,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:32:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:32:13,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264257196] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:32:13,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:32:13,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-19 17:32:13,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758252243] [2023-12-19 17:32:13,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:32:13,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 17:32:13,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:32:13,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 17:32:13,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-19 17:32:13,578 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:13,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:32:13,606 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2023-12-19 17:32:13,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 17:32:13,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-19 17:32:13,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:32:13,607 INFO L225 Difference]: With dead ends: 66 [2023-12-19 17:32:13,608 INFO L226 Difference]: Without dead ends: 36 [2023-12-19 17:32:13,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-19 17:32:13,611 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 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 [2023-12-19 17:32:13,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 17:32:13,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-19 17:32:13,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-19 17:32:13,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-12-19 17:32:13,623 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 22 [2023-12-19 17:32:13,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:32:13,623 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-12-19 17:32:13,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:13,623 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-12-19 17:32:13,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-19 17:32:13,624 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:32:13,624 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:32:13,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 17:32:13,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:32:13,831 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:32:13,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:32:13,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1200544991, now seen corresponding path program 2 times [2023-12-19 17:32:13,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:32:13,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133168162] [2023-12-19 17:32:13,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:13,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:32:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:32:13,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:32:13,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133168162] [2023-12-19 17:32:13,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133168162] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:32:13,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228830412] [2023-12-19 17:32:13,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 17:32:13,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:32:13,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:32:13,957 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) [2023-12-19 17:32:13,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 17:32:14,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-19 17:32:14,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:32:14,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 17:32:14,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:32:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 17:32:14,160 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 17:32:14,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228830412] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:32:14,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 17:32:14,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2023-12-19 17:32:14,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422508969] [2023-12-19 17:32:14,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:32:14,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 17:32:14,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:32:14,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 17:32:14,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-12-19 17:32:14,170 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:14,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:32:14,268 INFO L93 Difference]: Finished difference Result 113 states and 149 transitions. [2023-12-19 17:32:14,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 17:32:14,268 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-19 17:32:14,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:32:14,270 INFO L225 Difference]: With dead ends: 113 [2023-12-19 17:32:14,271 INFO L226 Difference]: Without dead ends: 64 [2023-12-19 17:32:14,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-12-19 17:32:14,272 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:32:14,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 106 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 17:32:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-19 17:32:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 43. [2023-12-19 17:32:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2023-12-19 17:32:14,279 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 25 [2023-12-19 17:32:14,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:32:14,279 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2023-12-19 17:32:14,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:14,279 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2023-12-19 17:32:14,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-19 17:32:14,280 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:32:14,280 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:32:14,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 17:32:14,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:32:14,486 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:32:14,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:32:14,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1901609569, now seen corresponding path program 1 times [2023-12-19 17:32:14,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:32:14,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123127544] [2023-12-19 17:32:14,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:14,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:32:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 17:32:14,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:32:14,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123127544] [2023-12-19 17:32:14,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123127544] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:32:14,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 17:32:14,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-19 17:32:14,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986113508] [2023-12-19 17:32:14,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:32:14,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 17:32:14,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:32:14,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 17:32:14,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-19 17:32:14,684 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:14,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:32:14,778 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2023-12-19 17:32:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 17:32:14,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-19 17:32:14,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:32:14,783 INFO L225 Difference]: With dead ends: 77 [2023-12-19 17:32:14,783 INFO L226 Difference]: Without dead ends: 75 [2023-12-19 17:32:14,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-12-19 17:32:14,784 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:32:14,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 88 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 17:32:14,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-19 17:32:14,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2023-12-19 17:32:14,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2023-12-19 17:32:14,798 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 25 [2023-12-19 17:32:14,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:32:14,798 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2023-12-19 17:32:14,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:14,798 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2023-12-19 17:32:14,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-19 17:32:14,800 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:32:14,800 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:32:14,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-19 17:32:14,801 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:32:14,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:32:14,801 INFO L85 PathProgramCache]: Analyzing trace with hash -520705210, now seen corresponding path program 1 times [2023-12-19 17:32:14,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:32:14,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961358752] [2023-12-19 17:32:14,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:14,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:32:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 17:32:14,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:32:14,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961358752] [2023-12-19 17:32:14,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961358752] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:32:14,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 17:32:14,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 17:32:14,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84632162] [2023-12-19 17:32:14,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:32:14,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 17:32:14,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:32:14,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 17:32:14,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 17:32:14,872 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:14,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:32:14,900 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2023-12-19 17:32:14,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 17:32:14,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-19 17:32:14,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:32:14,902 INFO L225 Difference]: With dead ends: 96 [2023-12-19 17:32:14,902 INFO L226 Difference]: Without dead ends: 68 [2023-12-19 17:32:14,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 17:32:14,904 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:32:14,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 78 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 17:32:14,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-19 17:32:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-12-19 17:32:14,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 67 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:14,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2023-12-19 17:32:14,919 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 27 [2023-12-19 17:32:14,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:32:14,920 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2023-12-19 17:32:14,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:14,920 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2023-12-19 17:32:14,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-19 17:32:14,924 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:32:14,924 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:32:14,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-19 17:32:14,925 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:32:14,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:32:14,925 INFO L85 PathProgramCache]: Analyzing trace with hash 159353160, now seen corresponding path program 1 times [2023-12-19 17:32:14,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:32:14,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896795895] [2023-12-19 17:32:14,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:14,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:32:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:32:15,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:32:15,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896795895] [2023-12-19 17:32:15,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896795895] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:32:15,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506848806] [2023-12-19 17:32:15,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:15,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:32:15,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:32:15,024 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) [2023-12-19 17:32:15,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 17:32:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:15,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 17:32:15,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:32:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:32:15,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:32:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:32:15,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506848806] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:32:15,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:32:15,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2023-12-19 17:32:15,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069825637] [2023-12-19 17:32:15,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:32:15,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 17:32:15,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:32:15,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 17:32:15,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2023-12-19 17:32:15,175 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:15,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:32:15,195 INFO L93 Difference]: Finished difference Result 133 states and 171 transitions. [2023-12-19 17:32:15,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 17:32:15,195 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-19 17:32:15,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:32:15,196 INFO L225 Difference]: With dead ends: 133 [2023-12-19 17:32:15,196 INFO L226 Difference]: Without dead ends: 71 [2023-12-19 17:32:15,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2023-12-19 17:32:15,198 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:32:15,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 17:32:15,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-19 17:32:15,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-12-19 17:32:15,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 70 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2023-12-19 17:32:15,209 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 27 [2023-12-19 17:32:15,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:32:15,210 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2023-12-19 17:32:15,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:15,210 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2023-12-19 17:32:15,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-19 17:32:15,211 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:32:15,211 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:32:15,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 17:32:15,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:32:15,417 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:32:15,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:32:15,417 INFO L85 PathProgramCache]: Analyzing trace with hash 790768220, now seen corresponding path program 2 times [2023-12-19 17:32:15,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:32:15,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686484203] [2023-12-19 17:32:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:15,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:32:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-19 17:32:15,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:32:15,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686484203] [2023-12-19 17:32:15,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686484203] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:32:15,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 17:32:15,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-19 17:32:15,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296242130] [2023-12-19 17:32:15,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:32:15,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 17:32:15,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:32:15,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 17:32:15,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-19 17:32:15,503 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:15,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:32:15,560 INFO L93 Difference]: Finished difference Result 141 states and 176 transitions. [2023-12-19 17:32:15,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 17:32:15,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-19 17:32:15,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:32:15,561 INFO L225 Difference]: With dead ends: 141 [2023-12-19 17:32:15,561 INFO L226 Difference]: Without dead ends: 98 [2023-12-19 17:32:15,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-19 17:32:15,564 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:32:15,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 107 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 17:32:15,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-12-19 17:32:15,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 74. [2023-12-19 17:32:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2602739726027397) internal successors, (92), 73 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:15,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2023-12-19 17:32:15,574 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 30 [2023-12-19 17:32:15,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:32:15,574 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2023-12-19 17:32:15,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:15,575 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2023-12-19 17:32:15,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-19 17:32:15,575 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:32:15,575 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:32:15,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-19 17:32:15,575 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:32:15,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:32:15,576 INFO L85 PathProgramCache]: Analyzing trace with hash -670035066, now seen corresponding path program 1 times [2023-12-19 17:32:15,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:32:15,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996270881] [2023-12-19 17:32:15,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:15,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:32:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-19 17:32:15,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:32:15,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996270881] [2023-12-19 17:32:15,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996270881] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:32:15,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 17:32:15,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 17:32:15,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836787283] [2023-12-19 17:32:15,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:32:15,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 17:32:15,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:32:15,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 17:32:15,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-19 17:32:15,744 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:15,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:32:15,868 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2023-12-19 17:32:15,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-19 17:32:15,868 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-12-19 17:32:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:32:15,869 INFO L225 Difference]: With dead ends: 142 [2023-12-19 17:32:15,869 INFO L226 Difference]: Without dead ends: 107 [2023-12-19 17:32:15,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-12-19 17:32:15,870 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 72 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:32:15,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 169 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 17:32:15,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-12-19 17:32:15,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 88. [2023-12-19 17:32:15,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 87 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:15,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 111 transitions. [2023-12-19 17:32:15,876 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 111 transitions. Word has length 32 [2023-12-19 17:32:15,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:32:15,876 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 111 transitions. [2023-12-19 17:32:15,877 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 111 transitions. [2023-12-19 17:32:15,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-19 17:32:15,878 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:32:15,878 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:32:15,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-19 17:32:15,878 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:32:15,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:32:15,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1584945875, now seen corresponding path program 1 times [2023-12-19 17:32:15,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:32:15,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559212421] [2023-12-19 17:32:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:15,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:32:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-19 17:32:15,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:32:15,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559212421] [2023-12-19 17:32:15,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559212421] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:32:15,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620988329] [2023-12-19 17:32:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:15,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:32:15,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:32:15,983 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) [2023-12-19 17:32:15,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 17:32:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:16,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 17:32:16,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:32:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-19 17:32:16,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:32:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-19 17:32:16,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620988329] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:32:16,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:32:16,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2023-12-19 17:32:16,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839637290] [2023-12-19 17:32:16,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:32:16,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 17:32:16,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:32:16,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 17:32:16,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-19 17:32:16,137 INFO L87 Difference]: Start difference. First operand 88 states and 111 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:16,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:32:16,217 INFO L93 Difference]: Finished difference Result 211 states and 265 transitions. [2023-12-19 17:32:16,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 17:32:16,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-19 17:32:16,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:32:16,220 INFO L225 Difference]: With dead ends: 211 [2023-12-19 17:32:16,220 INFO L226 Difference]: Without dead ends: 152 [2023-12-19 17:32:16,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-19 17:32:16,222 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 94 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:32:16,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 137 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 17:32:16,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-12-19 17:32:16,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 120. [2023-12-19 17:32:16,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.2436974789915967) internal successors, (148), 119 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 148 transitions. [2023-12-19 17:32:16,229 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 148 transitions. Word has length 34 [2023-12-19 17:32:16,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:32:16,230 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 148 transitions. [2023-12-19 17:32:16,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 148 transitions. [2023-12-19 17:32:16,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-19 17:32:16,231 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:32:16,231 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:32:16,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 17:32:16,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:32:16,437 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:32:16,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:32:16,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1116402816, now seen corresponding path program 2 times [2023-12-19 17:32:16,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:32:16,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314057052] [2023-12-19 17:32:16,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:16,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:32:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-19 17:32:16,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:32:16,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314057052] [2023-12-19 17:32:16,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314057052] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:32:16,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763892539] [2023-12-19 17:32:16,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 17:32:16,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:32:16,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:32:16,621 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) [2023-12-19 17:32:16,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 17:32:16,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 17:32:16,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:32:16,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-19 17:32:16,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:32:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-19 17:32:16,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:32:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-19 17:32:16,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763892539] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:32:16,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:32:16,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 20 [2023-12-19 17:32:16,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531098729] [2023-12-19 17:32:16,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:32:16,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-19 17:32:16,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:32:16,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-19 17:32:16,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-12-19 17:32:16,996 INFO L87 Difference]: Start difference. First operand 120 states and 148 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:17,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:32:17,588 INFO L93 Difference]: Finished difference Result 412 states and 533 transitions. [2023-12-19 17:32:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-19 17:32:17,588 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-19 17:32:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:32:17,589 INFO L225 Difference]: With dead ends: 412 [2023-12-19 17:32:17,589 INFO L226 Difference]: Without dead ends: 215 [2023-12-19 17:32:17,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=1223, Unknown=0, NotChecked=0, Total=1560 [2023-12-19 17:32:17,591 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 473 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 17:32:17,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 475 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 17:32:17,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-12-19 17:32:17,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 141. [2023-12-19 17:32:17,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.25) internal successors, (175), 140 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:17,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 175 transitions. [2023-12-19 17:32:17,596 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 175 transitions. Word has length 38 [2023-12-19 17:32:17,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:32:17,597 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 175 transitions. [2023-12-19 17:32:17,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:17,597 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 175 transitions. [2023-12-19 17:32:17,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-19 17:32:17,597 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:32:17,597 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:32:17,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-19 17:32:17,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:32:17,803 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:32:17,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:32:17,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1703208830, now seen corresponding path program 1 times [2023-12-19 17:32:17,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:32:17,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965542540] [2023-12-19 17:32:17,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:17,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:32:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-19 17:32:17,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:32:17,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965542540] [2023-12-19 17:32:17,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965542540] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:32:17,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164856520] [2023-12-19 17:32:17,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:17,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:32:17,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:32:17,940 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) [2023-12-19 17:32:17,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 17:32:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:18,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-19 17:32:18,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:32:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-19 17:32:18,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:32:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-19 17:32:18,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164856520] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:32:18,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:32:18,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-12-19 17:32:18,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204270557] [2023-12-19 17:32:18,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:32:18,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-19 17:32:18,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:32:18,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-19 17:32:18,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2023-12-19 17:32:18,290 INFO L87 Difference]: Start difference. First operand 141 states and 175 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:18,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:32:18,710 INFO L93 Difference]: Finished difference Result 253 states and 309 transitions. [2023-12-19 17:32:18,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-19 17:32:18,711 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-19 17:32:18,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:32:18,712 INFO L225 Difference]: With dead ends: 253 [2023-12-19 17:32:18,712 INFO L226 Difference]: Without dead ends: 251 [2023-12-19 17:32:18,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2023-12-19 17:32:18,713 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 401 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 17:32:18,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 312 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 17:32:18,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-12-19 17:32:18,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 163. [2023-12-19 17:32:18,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.2839506172839505) internal successors, (208), 162 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:18,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 208 transitions. [2023-12-19 17:32:18,719 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 208 transitions. Word has length 38 [2023-12-19 17:32:18,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:32:18,719 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 208 transitions. [2023-12-19 17:32:18,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:18,720 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 208 transitions. [2023-12-19 17:32:18,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-19 17:32:18,720 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:32:18,720 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:32:18,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-19 17:32:18,926 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,SelfDestructingSolverStorable12 [2023-12-19 17:32:18,926 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:32:18,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:32:18,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1703149248, now seen corresponding path program 1 times [2023-12-19 17:32:18,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:32:18,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084524368] [2023-12-19 17:32:18,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:18,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:32:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-19 17:32:18,959 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-19 17:32:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-19 17:32:18,995 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-19 17:32:18,995 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-19 17:32:18,996 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 17:32:18,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-19 17:32:19,000 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:32:19,003 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 17:32:19,032 WARN L1574 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-12-19 17:32:19,036 WARN L1574 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated [2023-12-19 17:32:19,036 WARN L1574 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated [2023-12-19 17:32:19,037 WARN L1574 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated [2023-12-19 17:32:19,038 WARN L1574 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated [2023-12-19 17:32:19,038 WARN L1574 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated [2023-12-19 17:32:19,039 WARN L1574 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated [2023-12-19 17:32:19,039 WARN L1574 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated [2023-12-19 17:32:19,044 WARN L1574 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated [2023-12-19 17:32:19,045 WARN L1574 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated [2023-12-19 17:32:19,045 WARN L1574 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated [2023-12-19 17:32:19,046 WARN L1574 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated [2023-12-19 17:32:19,047 WARN L1574 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated [2023-12-19 17:32:19,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 05:32:19 BoogieIcfgContainer [2023-12-19 17:32:19,059 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 17:32:19,059 INFO L158 Benchmark]: Toolchain (without parser) took 7916.12ms. Allocated memory is still 320.9MB. Free memory was 269.4MB in the beginning and 260.9MB in the end (delta: 8.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-12-19 17:32:19,059 INFO L158 Benchmark]: CDTParser took 0.67ms. Allocated memory is still 202.4MB. Free memory is still 150.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 17:32:19,060 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.96ms. Allocated memory is still 320.9MB. Free memory was 269.0MB in the beginning and 256.8MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-19 17:32:19,060 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.72ms. Allocated memory is still 320.9MB. Free memory was 256.8MB in the beginning and 254.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 17:32:19,060 INFO L158 Benchmark]: Boogie Preprocessor took 36.57ms. Allocated memory is still 320.9MB. Free memory was 254.7MB in the beginning and 252.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 17:32:19,061 INFO L158 Benchmark]: RCFGBuilder took 365.62ms. Allocated memory is still 320.9MB. Free memory was 252.2MB in the beginning and 235.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2023-12-19 17:32:19,061 INFO L158 Benchmark]: TraceAbstraction took 7222.43ms. Allocated memory is still 320.9MB. Free memory was 234.8MB in the beginning and 260.9MB in the end (delta: -26.1MB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 17:32:19,062 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.67ms. Allocated memory is still 202.4MB. Free memory is still 150.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 251.96ms. Allocated memory is still 320.9MB. Free memory was 269.0MB in the beginning and 256.8MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 32.72ms. Allocated memory is still 320.9MB. Free memory was 256.8MB in the beginning and 254.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.57ms. Allocated memory is still 320.9MB. Free memory was 254.7MB in the beginning and 252.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 365.62ms. Allocated memory is still 320.9MB. Free memory was 252.2MB in the beginning and 235.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 7222.43ms. Allocated memory is still 320.9MB. Free memory was 234.8MB in the beginning and 260.9MB in the end (delta: -26.1MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch5 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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 - UnprovableResult [Line: 16]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of strncpy at line 42. Possible FailurePath: [L86] char A [2 + 2 + 4 +1]; [L87] int i = 0; VAL [A={10:0}, i=0] [L87] COND TRUE i<2 + 2 + 4 -1 [L88] A[i] = __VERIFIER_nondet_char() [L87] i++ VAL [A={10:0}, i=1] [L87] COND TRUE i<2 + 2 + 4 -1 [L88] A[i] = __VERIFIER_nondet_char() [L87] i++ VAL [A={10:0}, i=2] [L87] COND TRUE i<2 + 2 + 4 -1 [L88] A[i] = __VERIFIER_nondet_char() [L87] i++ VAL [A={10:0}, i=3] [L87] COND TRUE i<2 + 2 + 4 -1 [L88] A[i] = __VERIFIER_nondet_char() [L87] i++ VAL [A={10:0}, i=4] [L87] COND TRUE i<2 + 2 + 4 -1 [L88] A[i] = __VERIFIER_nondet_char() [L87] i++ VAL [A={10:0}, i=5] [L87] COND TRUE i<2 + 2 + 4 -1 [L88] A[i] = __VERIFIER_nondet_char() [L87] i++ VAL [A={10:0}, i=6] [L87] COND TRUE i<2 + 2 + 4 -1 [L88] A[i] = __VERIFIER_nondet_char() [L87] i++ VAL [A={10:0}, i=7] [L87] COND FALSE !(i<2 + 2 + 4 -1) VAL [A={10:0}, i=7] [L90] A[2 + 2 + 4] = 0 [L91] CALL parse_expression_list (A) [L60] int start=0, i=-1, j=-1; [L61] char str2[2]; VAL [i=-1, j=-1, start=0, str2={7:0}, str={10:0}, str={10:0}] [L62] COND FALSE !(!str) VAL [i=-1, j=-1, start=0, str2={7:0}, str={10:0}, str={10:0}] [L64] i++ [L65] str[i] [L66] case 0: VAL [i=0, j=-1, start=0, str2={7:0}, str={10:0}, str={10:0}] [L66] case 0: [L81] EXPR str[i] [L81] COND TRUE str[i] != 0 [L64] i++ [L65] str[i] [L66] case 0: VAL [i=1, j=-1, start=0, str2={7:0}, str={10:0}, str={10:0}] [L66] case 0: [L81] EXPR str[i] [L81] COND TRUE str[i] != 0 [L64] i++ [L65] str[i] [L66] case 0: VAL [i=2, j=-1, start=0, str2={7:0}, str={10:0}, str={10:0}] [L66] case 0: [L67] EXPR str[start] [L67] (str[start] == ' ') || (str[start] == '\t') VAL [i=2, j=-1, start=0, str2={7:0}, str={10:0}, str={10:0}] [L67] (str[start] == ' ') || (str[start] == '\t') [L67] EXPR str[start] [L67] (str[start] == ' ') || (str[start] == '\t') VAL [i=2, j=-1, start=0, str2={7:0}, str={10:0}, str={10:0}] [L67] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L68] str[start] [L66] case 0: [L69] j = i-1 VAL [i=2, j=1, start=0, str2={7:0}, str={10:0}, str={10:0}] [L70] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) VAL [i=2, j=1, start=0, str2={7:0}, str={10:0}, str={10:0}] [L70] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L70] EXPR str[j] [L70] EXPR (str[j] == ' ') || (str[j] == '\t') VAL [i=2, j=1, start=0, str2={7:0}, str={10:0}, str={10:0}] [L70] EXPR (str[j] == ' ') || (str[j] == '\t') [L70] EXPR str[j] [L70] EXPR (str[j] == ' ') || (str[j] == '\t') VAL [i=2, j=1, start=0, str2={7:0}, str={10:0}, str={10:0}] [L70] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) VAL [i=2, j=1, start=0, str2={7:0}, str={10:0}, str={10:0}] [L70] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L71] (0 < j) && (str[j] == '"') VAL [i=2, j=1, start=0, str2={7:0}, str={10:0}, str={10:0}] [L66] case 0: [L71] EXPR str[j] [L71] (0 < j) && (str[j] == '"') VAL [i=2, j=1, start=0, str2={7:0}, str={10:0}, str={10:0}] [L66] case 0: [L66] case 0: [L73] CALL r_strncpy(str2, str+start, j-start+1) [L42] return strncpy(dest,src,n); [L73] RET r_strncpy(str2, str+start, j-start+1) [L74] CALL __VERIFIER_assert(j - start + 1 < 2) [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.1s, OverallIterations: 14, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1222 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1222 mSDsluCounter, 1898 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1489 mSDsCounter, 132 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1534 IncrementalHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 132 mSolverCounterUnsat, 409 mSDtfsCounter, 1534 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 506 GetRequests, 348 SyntacticMatches, 11 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=163occurred in iteration=13, InterpolantAutomatonStates: 130, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 286 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 625 NumberOfCodeBlocks, 621 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 720 ConstructedInterpolants, 0 QuantifiedInterpolants, 1953 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1166 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 26 InterpolantComputations, 8 PerfectInterpolantSequences, 342/441 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: unable to determine feasibility of some traces [2023-12-19 17:32:19,081 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 Received shutdown request...