/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'z3 -smt2 -in SMTLIB2_COMPLIANT=true' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/floats-nonlinear/color-magicseries2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-03 00:28:05,811 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-03 00:28:05,884 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-03 00:28:05,891 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-03 00:28:05,894 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-03 00:28:05,925 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-03 00:28:05,926 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-03 00:28:05,926 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-03 00:28:05,927 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-03 00:28:05,927 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-03 00:28:05,928 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-03 00:28:05,929 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-03 00:28:05,930 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-03 00:28:05,930 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-03 00:28:05,930 INFO L153 SettingsManager]: * Use SBE=true [2024-11-03 00:28:05,931 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-03 00:28:05,931 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-03 00:28:05,931 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-03 00:28:05,932 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-03 00:28:05,932 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-03 00:28:05,932 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-03 00:28:05,934 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-03 00:28:05,935 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-03 00:28:05,935 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-03 00:28:05,938 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-03 00:28:05,938 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-03 00:28:05,938 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-03 00:28:05,938 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-03 00:28:05,939 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-03 00:28:05,939 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-03 00:28:05,940 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-03 00:28:05,940 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-03 00:28:05,940 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-03 00:28:05,940 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-03 00:28:05,941 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 00:28:05,941 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-03 00:28:05,941 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-03 00:28:05,941 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-03 00:28:05,942 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-03 00:28:05,942 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-03 00:28:05,942 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-03 00:28:05,944 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-03 00:28:05,944 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-03 00:28:05,944 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-03 00:28:05,945 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:06,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-03 00:28:06,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-03 00:28:06,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-03 00:28:06,232 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-03 00:28:06,233 INFO L274 PluginConnector]: CDTParser initialized [2024-11-03 00:28:06,235 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/floats-nonlinear/color-magicseries2.c [2024-11-03 00:28:07,713 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-03 00:28:07,906 INFO L384 CDTParser]: Found 1 translation units. [2024-11-03 00:28:07,907 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/floats-nonlinear/color-magicseries2.c [2024-11-03 00:28:07,914 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fefe1b82e/6e7d81e2274d42c58b806e5df26607e4/FLAG4177ac504 [2024-11-03 00:28:08,299 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fefe1b82e/6e7d81e2274d42c58b806e5df26607e4 [2024-11-03 00:28:08,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-03 00:28:08,303 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-03 00:28:08,306 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-03 00:28:08,306 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-03 00:28:08,311 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-03 00:28:08,312 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 12:28:08" (1/1) ... [2024-11-03 00:28:08,313 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c6c0a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:28:08, skipping insertion in model container [2024-11-03 00:28:08,313 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 12:28:08" (1/1) ... [2024-11-03 00:28:08,337 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-03 00:28:08,490 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-nonlinear/color-magicseries2.c[613,626] [2024-11-03 00:28:08,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 00:28:08,524 INFO L200 MainTranslator]: Completed pre-run [2024-11-03 00:28:08,533 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-nonlinear/color-magicseries2.c[613,626] [2024-11-03 00:28:08,545 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 00:28:08,563 INFO L204 MainTranslator]: Completed translation [2024-11-03 00:28:08,563 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:28:08 WrapperNode [2024-11-03 00:28:08,564 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-03 00:28:08,565 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-03 00:28:08,565 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-03 00:28:08,565 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-03 00:28:08,572 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:28:08" (1/1) ... [2024-11-03 00:28:08,583 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:28:08" (1/1) ... [2024-11-03 00:28:08,615 INFO L138 Inliner]: procedures = 20, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 132 [2024-11-03 00:28:08,615 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-03 00:28:08,617 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-03 00:28:08,617 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-03 00:28:08,617 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-03 00:28:08,625 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:28:08" (1/1) ... [2024-11-03 00:28:08,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:28:08" (1/1) ... [2024-11-03 00:28:08,629 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:28:08" (1/1) ... [2024-11-03 00:28:08,641 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 4]. The 0 writes are split as follows [0, 0]. [2024-11-03 00:28:08,641 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:28:08" (1/1) ... [2024-11-03 00:28:08,641 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:28:08" (1/1) ... [2024-11-03 00:28:08,648 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:28:08" (1/1) ... [2024-11-03 00:28:08,651 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:28:08" (1/1) ... [2024-11-03 00:28:08,653 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:28:08" (1/1) ... [2024-11-03 00:28:08,654 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:28:08" (1/1) ... [2024-11-03 00:28:08,656 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-03 00:28:08,659 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-03 00:28:08,659 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-03 00:28:08,660 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-03 00:28:08,660 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:28:08" (1/1) ... [2024-11-03 00:28:08,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 00:28:08,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:08,697 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) [2024-11-03 00:28:08,710 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 [2024-11-03 00:28:08,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-03 00:28:08,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-03 00:28:08,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-03 00:28:08,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2024-11-03 00:28:08,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2024-11-03 00:28:08,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-03 00:28:08,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-03 00:28:08,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-03 00:28:08,734 INFO L130 BoogieDeclarations]: Found specification of procedure check_domain [2024-11-03 00:28:08,735 INFO L138 BoogieDeclarations]: Found implementation of procedure check_domain [2024-11-03 00:28:08,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-03 00:28:08,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-03 00:28:08,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-03 00:28:08,820 INFO L238 CfgBuilder]: Building ICFG [2024-11-03 00:28:08,822 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-03 00:28:09,119 INFO L? ?]: Removed 45 outVars from TransFormulas that were not future-live. [2024-11-03 00:28:09,119 INFO L287 CfgBuilder]: Performing block encoding [2024-11-03 00:28:09,135 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-03 00:28:09,135 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-03 00:28:09,136 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 12:28:09 BoogieIcfgContainer [2024-11-03 00:28:09,136 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-03 00:28:09,139 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-03 00:28:09,139 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-03 00:28:09,142 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-03 00:28:09,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 12:28:08" (1/3) ... [2024-11-03 00:28:09,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba70bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 12:28:09, skipping insertion in model container [2024-11-03 00:28:09,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 12:28:08" (2/3) ... [2024-11-03 00:28:09,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba70bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 12:28:09, skipping insertion in model container [2024-11-03 00:28:09,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 12:28:09" (3/3) ... [2024-11-03 00:28:09,145 INFO L112 eAbstractionObserver]: Analyzing ICFG color-magicseries2.c [2024-11-03 00:28:09,162 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-03 00:28:09,163 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-03 00:28:09,222 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-03 00:28:09,228 INFO L333 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, 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;@6a4a6a98, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-03 00:28:09,228 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-03 00:28:09,233 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 32 states have (on average 1.46875) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-03 00:28:09,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-03 00:28:09,240 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:28:09,240 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 00:28:09,241 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:28:09,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:28:09,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1909413201, now seen corresponding path program 1 times [2024-11-03 00:28:09,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:28:09,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343174937] [2024-11-03 00:28:09,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:28:09,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:09,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:09,257 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) [2024-11-03 00:28:09,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-03 00:28:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:28:09,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-03 00:28:09,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:28:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-03 00:28:09,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:28:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-03 00:28:09,552 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:28:09,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343174937] [2024-11-03 00:28:09,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [343174937] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 00:28:09,553 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 00:28:09,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2024-11-03 00:28:09,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251552680] [2024-11-03 00:28:09,557 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 00:28:09,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-03 00:28:09,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:28:09,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-03 00:28:09,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-03 00:28:09,593 INFO L87 Difference]: Start difference. First operand has 39 states, 32 states have (on average 1.46875) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-03 00:28:09,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:28:09,666 INFO L93 Difference]: Finished difference Result 75 states and 108 transitions. [2024-11-03 00:28:09,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-03 00:28:09,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-11-03 00:28:09,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:28:09,677 INFO L225 Difference]: With dead ends: 75 [2024-11-03 00:28:09,678 INFO L226 Difference]: Without dead ends: 39 [2024-11-03 00:28:09,682 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-03 00:28:09,688 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 00:28:09,689 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 235 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 00:28:09,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-03 00:28:09,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-03 00:28:09,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-03 00:28:09,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2024-11-03 00:28:09,736 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 17 [2024-11-03 00:28:09,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:28:09,737 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2024-11-03 00:28:09,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-03 00:28:09,738 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2024-11-03 00:28:09,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-03 00:28:09,740 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:28:09,741 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 00:28:09,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-03 00:28:09,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:09,947 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:28:09,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:28:09,948 INFO L85 PathProgramCache]: Analyzing trace with hash 2092151088, now seen corresponding path program 1 times [2024-11-03 00:28:09,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:28:09,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759843123] [2024-11-03 00:28:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:28:09,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:09,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:09,951 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) [2024-11-03 00:28:09,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-03 00:28:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:28:10,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-03 00:28:10,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:28:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-03 00:28:10,042 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:28:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-03 00:28:10,070 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:28:10,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759843123] [2024-11-03 00:28:10,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1759843123] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 00:28:10,070 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 00:28:10,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2024-11-03 00:28:10,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199514479] [2024-11-03 00:28:10,071 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 00:28:10,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-03 00:28:10,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:28:10,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-03 00:28:10,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-03 00:28:10,073 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-03 00:28:10,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:28:10,092 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2024-11-03 00:28:10,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-03 00:28:10,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-03 00:28:10,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:28:10,094 INFO L225 Difference]: With dead ends: 43 [2024-11-03 00:28:10,094 INFO L226 Difference]: Without dead ends: 39 [2024-11-03 00:28:10,095 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-03 00:28:10,096 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 00:28:10,097 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 00:28:10,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-03 00:28:10,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-03 00:28:10,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-03 00:28:10,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2024-11-03 00:28:10,105 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 17 [2024-11-03 00:28:10,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:28:10,107 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2024-11-03 00:28:10,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-03 00:28:10,108 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2024-11-03 00:28:10,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-03 00:28:10,110 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:28:10,110 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 00:28:10,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-03 00:28:10,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:10,315 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:28:10,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:28:10,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1014348991, now seen corresponding path program 1 times [2024-11-03 00:28:10,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:28:10,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636116475] [2024-11-03 00:28:10,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:28:10,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:10,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:10,319 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) [2024-11-03 00:28:10,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-03 00:28:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:28:10,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-03 00:28:10,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:28:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-03 00:28:10,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:28:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-03 00:28:10,400 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:28:10,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636116475] [2024-11-03 00:28:10,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [636116475] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 00:28:10,401 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 00:28:10,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-11-03 00:28:10,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494171943] [2024-11-03 00:28:10,401 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 00:28:10,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-03 00:28:10,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:28:10,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-03 00:28:10,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-03 00:28:10,403 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-03 00:28:10,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:28:10,436 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2024-11-03 00:28:10,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-03 00:28:10,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-11-03 00:28:10,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:28:10,441 INFO L225 Difference]: With dead ends: 55 [2024-11-03 00:28:10,441 INFO L226 Difference]: Without dead ends: 39 [2024-11-03 00:28:10,442 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-03 00:28:10,445 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 00:28:10,446 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 00:28:10,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-03 00:28:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-03 00:28:10,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-03 00:28:10,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2024-11-03 00:28:10,459 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 19 [2024-11-03 00:28:10,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:28:10,459 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2024-11-03 00:28:10,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-03 00:28:10,460 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2024-11-03 00:28:10,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-03 00:28:10,461 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:28:10,461 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 00:28:10,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-03 00:28:10,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:10,662 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:28:10,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:28:10,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1993641799, now seen corresponding path program 1 times [2024-11-03 00:28:10,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:28:10,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962903524] [2024-11-03 00:28:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:28:10,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:10,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:10,666 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) [2024-11-03 00:28:10,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-03 00:28:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:28:10,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-03 00:28:10,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:28:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-03 00:28:10,737 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:28:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-03 00:28:10,753 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:28:10,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962903524] [2024-11-03 00:28:10,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1962903524] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 00:28:10,754 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 00:28:10,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-11-03 00:28:10,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442594442] [2024-11-03 00:28:10,754 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 00:28:10,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-03 00:28:10,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:28:10,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-03 00:28:10,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-03 00:28:10,761 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-03 00:28:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:28:10,803 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2024-11-03 00:28:10,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-03 00:28:10,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2024-11-03 00:28:10,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:28:10,805 INFO L225 Difference]: With dead ends: 44 [2024-11-03 00:28:10,805 INFO L226 Difference]: Without dead ends: 39 [2024-11-03 00:28:10,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-03 00:28:10,806 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 00:28:10,807 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 83 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 00:28:10,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-03 00:28:10,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-03 00:28:10,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-03 00:28:10,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2024-11-03 00:28:10,820 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 25 [2024-11-03 00:28:10,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:28:10,822 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2024-11-03 00:28:10,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-03 00:28:10,822 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2024-11-03 00:28:10,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-03 00:28:10,825 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:28:10,825 INFO L215 NwaCegarLoop]: trace histogram [2, 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] [2024-11-03 00:28:10,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-03 00:28:11,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:11,026 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:28:11,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:28:11,027 INFO L85 PathProgramCache]: Analyzing trace with hash 781008275, now seen corresponding path program 1 times [2024-11-03 00:28:11,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:28:11,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134642506] [2024-11-03 00:28:11,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:28:11,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:11,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:11,029 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) [2024-11-03 00:28:11,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-03 00:28:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:28:11,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-03 00:28:11,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:28:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-03 00:28:11,118 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:28:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-03 00:28:11,140 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:28:11,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134642506] [2024-11-03 00:28:11,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1134642506] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 00:28:11,140 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 00:28:11,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2024-11-03 00:28:11,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282721919] [2024-11-03 00:28:11,141 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 00:28:11,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-03 00:28:11,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:28:11,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-03 00:28:11,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-03 00:28:11,146 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-03 00:28:11,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:28:11,188 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-11-03 00:28:11,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-03 00:28:11,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-11-03 00:28:11,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:28:11,191 INFO L225 Difference]: With dead ends: 65 [2024-11-03 00:28:11,191 INFO L226 Difference]: Without dead ends: 39 [2024-11-03 00:28:11,191 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-03 00:28:11,192 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 00:28:11,193 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 00:28:11,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-03 00:28:11,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-03 00:28:11,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-03 00:28:11,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2024-11-03 00:28:11,204 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 28 [2024-11-03 00:28:11,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:28:11,205 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2024-11-03 00:28:11,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-03 00:28:11,206 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2024-11-03 00:28:11,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-03 00:28:11,207 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:28:11,207 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 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, 1] [2024-11-03 00:28:11,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-03 00:28:11,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:11,408 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:28:11,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:28:11,408 INFO L85 PathProgramCache]: Analyzing trace with hash -783473984, now seen corresponding path program 1 times [2024-11-03 00:28:11,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:28:11,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186557549] [2024-11-03 00:28:11,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:28:11,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:11,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:11,411 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) [2024-11-03 00:28:11,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-03 00:28:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:28:11,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-03 00:28:11,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:28:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-03 00:28:11,510 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:28:11,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-03 00:28:11,538 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:28:11,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186557549] [2024-11-03 00:28:11,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [186557549] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 00:28:11,538 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 00:28:11,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2024-11-03 00:28:11,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642036094] [2024-11-03 00:28:11,539 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 00:28:11,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-03 00:28:11,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:28:11,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-03 00:28:11,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-03 00:28:11,542 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-03 00:28:11,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:28:11,584 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2024-11-03 00:28:11,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-03 00:28:11,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2024-11-03 00:28:11,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:28:11,587 INFO L225 Difference]: With dead ends: 69 [2024-11-03 00:28:11,587 INFO L226 Difference]: Without dead ends: 39 [2024-11-03 00:28:11,587 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-03 00:28:11,588 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 00:28:11,588 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 00:28:11,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-03 00:28:11,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2024-11-03 00:28:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-03 00:28:11,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-11-03 00:28:11,599 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 34 [2024-11-03 00:28:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:28:11,600 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-11-03 00:28:11,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-03 00:28:11,600 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-11-03 00:28:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-03 00:28:11,602 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:28:11,603 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1] [2024-11-03 00:28:11,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-03 00:28:11,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:11,804 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:28:11,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:28:11,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1611689165, now seen corresponding path program 1 times [2024-11-03 00:28:11,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:28:11,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571443464] [2024-11-03 00:28:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:28:11,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:11,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:11,806 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) [2024-11-03 00:28:11,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-03 00:28:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:28:11,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-03 00:28:11,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:28:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-03 00:28:11,903 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:28:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-03 00:28:11,929 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:28:11,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571443464] [2024-11-03 00:28:11,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1571443464] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 00:28:11,929 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 00:28:11,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-03 00:28:11,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89456697] [2024-11-03 00:28:11,930 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 00:28:11,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-03 00:28:11,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:28:11,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-03 00:28:11,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-03 00:28:11,936 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:11,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:28:11,979 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2024-11-03 00:28:11,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-03 00:28:11,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2024-11-03 00:28:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:28:11,981 INFO L225 Difference]: With dead ends: 52 [2024-11-03 00:28:11,981 INFO L226 Difference]: Without dead ends: 45 [2024-11-03 00:28:11,981 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-03 00:28:11,982 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 27 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 00:28:11,982 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 70 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 00:28:11,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-03 00:28:11,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2024-11-03 00:28:11,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-03 00:28:11,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2024-11-03 00:28:11,996 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 40 [2024-11-03 00:28:11,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:28:11,997 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2024-11-03 00:28:11,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:11,997 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2024-11-03 00:28:12,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-03 00:28:12,000 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:28:12,000 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1] [2024-11-03 00:28:12,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-03 00:28:12,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:12,201 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:28:12,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:28:12,202 INFO L85 PathProgramCache]: Analyzing trace with hash 35157834, now seen corresponding path program 1 times [2024-11-03 00:28:12,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:28:12,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915744806] [2024-11-03 00:28:12,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:28:12,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:12,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:12,205 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) [2024-11-03 00:28:12,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-03 00:28:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:28:12,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-03 00:28:12,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:28:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-03 00:28:12,324 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:28:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-03 00:28:12,361 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:28:12,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915744806] [2024-11-03 00:28:12,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [915744806] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 00:28:12,361 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 00:28:12,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2024-11-03 00:28:12,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962789256] [2024-11-03 00:28:12,361 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 00:28:12,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-03 00:28:12,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:28:12,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-03 00:28:12,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-03 00:28:12,363 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:12,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:28:12,397 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2024-11-03 00:28:12,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-03 00:28:12,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2024-11-03 00:28:12,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:28:12,399 INFO L225 Difference]: With dead ends: 49 [2024-11-03 00:28:12,399 INFO L226 Difference]: Without dead ends: 43 [2024-11-03 00:28:12,399 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-03 00:28:12,400 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 00:28:12,400 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 00:28:12,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-03 00:28:12,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-03 00:28:12,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-03 00:28:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2024-11-03 00:28:12,405 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 42 [2024-11-03 00:28:12,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:28:12,406 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2024-11-03 00:28:12,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:12,406 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2024-11-03 00:28:12,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-03 00:28:12,407 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:28:12,407 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2024-11-03 00:28:12,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-03 00:28:12,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:12,608 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:28:12,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:28:12,609 INFO L85 PathProgramCache]: Analyzing trace with hash 542098259, now seen corresponding path program 1 times [2024-11-03 00:28:12,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:28:12,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359236935] [2024-11-03 00:28:12,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:28:12,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:12,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:12,610 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-03 00:28:12,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-03 00:28:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:28:12,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-03 00:28:12,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:28:12,706 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-03 00:28:12,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:28:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-03 00:28:12,732 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:28:12,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359236935] [2024-11-03 00:28:12,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [359236935] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 00:28:12,732 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 00:28:12,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-03 00:28:12,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165840649] [2024-11-03 00:28:12,732 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 00:28:12,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-03 00:28:12,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:28:12,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-03 00:28:12,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-03 00:28:12,734 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:28:12,759 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2024-11-03 00:28:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-03 00:28:12,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2024-11-03 00:28:12,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:28:12,760 INFO L225 Difference]: With dead ends: 69 [2024-11-03 00:28:12,760 INFO L226 Difference]: Without dead ends: 51 [2024-11-03 00:28:12,761 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-03 00:28:12,761 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 00:28:12,762 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 73 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 00:28:12,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-03 00:28:12,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-03 00:28:12,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-03 00:28:12,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-11-03 00:28:12,770 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 50 [2024-11-03 00:28:12,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:28:12,770 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-11-03 00:28:12,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:12,771 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-11-03 00:28:12,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-03 00:28:12,771 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:28:12,772 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2024-11-03 00:28:12,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-03 00:28:12,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:12,976 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:28:12,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:28:12,976 INFO L85 PathProgramCache]: Analyzing trace with hash 841034003, now seen corresponding path program 1 times [2024-11-03 00:28:12,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:28:12,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936519393] [2024-11-03 00:28:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:28:12,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:12,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:12,978 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-03 00:28:12,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-03 00:28:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:28:13,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-03 00:28:13,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:28:13,350 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-03 00:28:13,351 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:28:13,546 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-03 00:28:13,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2024-11-03 00:28:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-03 00:28:13,586 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:28:13,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936519393] [2024-11-03 00:28:13,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [936519393] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 00:28:13,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 00:28:13,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2024-11-03 00:28:13,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465050129] [2024-11-03 00:28:13,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 00:28:13,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-03 00:28:13,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:28:13,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-03 00:28:13,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-03 00:28:13,589 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:14,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:28:14,137 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2024-11-03 00:28:14,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-03 00:28:14,140 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2024-11-03 00:28:14,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:28:14,141 INFO L225 Difference]: With dead ends: 118 [2024-11-03 00:28:14,141 INFO L226 Difference]: Without dead ends: 100 [2024-11-03 00:28:14,142 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2024-11-03 00:28:14,143 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 77 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-03 00:28:14,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 235 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-03 00:28:14,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-03 00:28:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2024-11-03 00:28:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.205128205128205) internal successors, (94), 78 states have internal predecessors, (94), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-03 00:28:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2024-11-03 00:28:14,166 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 62 [2024-11-03 00:28:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:28:14,166 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2024-11-03 00:28:14,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2024-11-03 00:28:14,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-03 00:28:14,168 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:28:14,168 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 00:28:14,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-03 00:28:14,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:14,376 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:28:14,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:28:14,376 INFO L85 PathProgramCache]: Analyzing trace with hash -180034351, now seen corresponding path program 1 times [2024-11-03 00:28:14,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:28:14,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252417805] [2024-11-03 00:28:14,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:28:14,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:14,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:14,378 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-03 00:28:14,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-03 00:28:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:28:14,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-03 00:28:14,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:28:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-03 00:28:14,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:28:15,047 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-03 00:28:15,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2024-11-03 00:28:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-03 00:28:15,131 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:28:15,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252417805] [2024-11-03 00:28:15,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1252417805] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 00:28:15,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 00:28:15,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2024-11-03 00:28:15,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659198485] [2024-11-03 00:28:15,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 00:28:15,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-03 00:28:15,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:28:15,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-03 00:28:15,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-11-03 00:28:15,135 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:28:15,919 INFO L93 Difference]: Finished difference Result 261 states and 333 transitions. [2024-11-03 00:28:15,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-03 00:28:15,920 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2024-11-03 00:28:15,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:28:15,922 INFO L225 Difference]: With dead ends: 261 [2024-11-03 00:28:15,922 INFO L226 Difference]: Without dead ends: 223 [2024-11-03 00:28:15,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2024-11-03 00:28:15,924 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 88 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-03 00:28:15,924 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 421 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-03 00:28:15,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-03 00:28:15,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 182. [2024-11-03 00:28:15,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 176 states have (on average 1.2613636363636365) internal successors, (222), 176 states have internal predecessors, (222), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-03 00:28:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 230 transitions. [2024-11-03 00:28:15,958 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 230 transitions. Word has length 62 [2024-11-03 00:28:15,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:28:15,958 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 230 transitions. [2024-11-03 00:28:15,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:15,959 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 230 transitions. [2024-11-03 00:28:15,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-03 00:28:15,960 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:28:15,960 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 00:28:15,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-03 00:28:16,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:16,165 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:28:16,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:28:16,165 INFO L85 PathProgramCache]: Analyzing trace with hash -766840365, now seen corresponding path program 2 times [2024-11-03 00:28:16,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:28:16,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501851441] [2024-11-03 00:28:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:28:16,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:16,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:16,167 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-03 00:28:16,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-03 00:28:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:28:16,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-03 00:28:16,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:28:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-03 00:28:16,433 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:28:16,554 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-03 00:28:16,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-03 00:28:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-03 00:28:16,621 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:28:16,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501851441] [2024-11-03 00:28:16,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1501851441] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 00:28:16,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 00:28:16,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-03 00:28:16,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596327519] [2024-11-03 00:28:16,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 00:28:16,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-03 00:28:16,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:28:16,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-03 00:28:16,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-11-03 00:28:16,623 INFO L87 Difference]: Start difference. First operand 182 states and 230 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:17,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:28:17,096 INFO L93 Difference]: Finished difference Result 331 states and 422 transitions. [2024-11-03 00:28:17,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-03 00:28:17,097 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2024-11-03 00:28:17,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:28:17,099 INFO L225 Difference]: With dead ends: 331 [2024-11-03 00:28:17,099 INFO L226 Difference]: Without dead ends: 210 [2024-11-03 00:28:17,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2024-11-03 00:28:17,101 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 62 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 00:28:17,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 227 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 00:28:17,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-11-03 00:28:17,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 206. [2024-11-03 00:28:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 200 states have (on average 1.27) internal successors, (254), 200 states have internal predecessors, (254), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-03 00:28:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 262 transitions. [2024-11-03 00:28:17,126 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 262 transitions. Word has length 62 [2024-11-03 00:28:17,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:28:17,127 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 262 transitions. [2024-11-03 00:28:17,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:17,127 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 262 transitions. [2024-11-03 00:28:17,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-03 00:28:17,128 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:28:17,128 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 00:28:17,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-03 00:28:17,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:17,333 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:28:17,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:28:17,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2117511273, now seen corresponding path program 3 times [2024-11-03 00:28:17,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:28:17,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306653085] [2024-11-03 00:28:17,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:28:17,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:17,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:17,335 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-03 00:28:17,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-03 00:28:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:28:17,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-03 00:28:17,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:28:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-03 00:28:17,459 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:28:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-03 00:28:17,523 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:28:17,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306653085] [2024-11-03 00:28:17,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1306653085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 00:28:17,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 00:28:17,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-03 00:28:17,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154334767] [2024-11-03 00:28:17,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 00:28:17,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-03 00:28:17,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:28:17,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-03 00:28:17,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-03 00:28:17,525 INFO L87 Difference]: Start difference. First operand 206 states and 262 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:17,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:28:17,590 INFO L93 Difference]: Finished difference Result 390 states and 506 transitions. [2024-11-03 00:28:17,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-03 00:28:17,591 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2024-11-03 00:28:17,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:28:17,593 INFO L225 Difference]: With dead ends: 390 [2024-11-03 00:28:17,593 INFO L226 Difference]: Without dead ends: 277 [2024-11-03 00:28:17,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-03 00:28:17,594 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 14 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 00:28:17,594 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 00:28:17,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-11-03 00:28:17,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 261. [2024-11-03 00:28:17,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 255 states have (on average 1.2549019607843137) internal successors, (320), 255 states have internal predecessors, (320), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-03 00:28:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 328 transitions. [2024-11-03 00:28:17,623 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 328 transitions. Word has length 62 [2024-11-03 00:28:17,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:28:17,624 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 328 transitions. [2024-11-03 00:28:17,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:17,624 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 328 transitions. [2024-11-03 00:28:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-03 00:28:17,626 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:28:17,626 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 6, 4, 4, 4, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2024-11-03 00:28:17,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-03 00:28:17,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:17,827 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:28:17,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:28:17,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1683714263, now seen corresponding path program 4 times [2024-11-03 00:28:17,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:28:17,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982758224] [2024-11-03 00:28:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:28:17,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:17,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:17,832 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-03 00:28:17,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-03 00:28:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:28:17,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-03 00:28:17,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:28:20,368 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 61 proven. 22 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-03 00:28:20,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:28:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 62 proven. 30 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-03 00:28:21,325 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:28:21,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982758224] [2024-11-03 00:28:21,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1982758224] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 00:28:21,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 00:28:21,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2024-11-03 00:28:21,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912199670] [2024-11-03 00:28:21,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 00:28:21,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-03 00:28:21,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:28:21,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-03 00:28:21,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2024-11-03 00:28:21,328 INFO L87 Difference]: Start difference. First operand 261 states and 328 transitions. Second operand has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 4 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-03 00:28:27,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:28:27,793 INFO L93 Difference]: Finished difference Result 926 states and 1186 transitions. [2024-11-03 00:28:27,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-03 00:28:27,794 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 4 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 74 [2024-11-03 00:28:27,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:28:27,798 INFO L225 Difference]: With dead ends: 926 [2024-11-03 00:28:27,798 INFO L226 Difference]: Without dead ends: 805 [2024-11-03 00:28:27,800 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=843, Invalid=4127, Unknown=0, NotChecked=0, Total=4970 [2024-11-03 00:28:27,801 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 219 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-03 00:28:27,801 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 520 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-03 00:28:27,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2024-11-03 00:28:27,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 376. [2024-11-03 00:28:27,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 366 states have (on average 1.2814207650273224) internal successors, (469), 366 states have internal predecessors, (469), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2024-11-03 00:28:27,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 490 transitions. [2024-11-03 00:28:27,857 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 490 transitions. Word has length 74 [2024-11-03 00:28:27,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:28:27,858 INFO L471 AbstractCegarLoop]: Abstraction has 376 states and 490 transitions. [2024-11-03 00:28:27,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 4 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-03 00:28:27,858 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 490 transitions. [2024-11-03 00:28:27,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-03 00:28:27,859 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:28:27,860 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2024-11-03 00:28:27,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-03 00:28:28,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:28,064 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:28:28,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:28:28,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1925201235, now seen corresponding path program 5 times [2024-11-03 00:28:28,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:28:28,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340369492] [2024-11-03 00:28:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:28:28,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:28,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:28,066 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-03 00:28:28,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-03 00:28:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:28:28,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-03 00:28:28,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:28:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 3 proven. 90 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-03 00:28:28,506 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:28:28,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-03 00:28:28,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 23 [2024-11-03 00:28:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 5 proven. 88 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-03 00:28:28,830 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:28:28,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340369492] [2024-11-03 00:28:28,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1340369492] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 00:28:28,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 00:28:28,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2024-11-03 00:28:28,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951006834] [2024-11-03 00:28:28,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 00:28:28,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-03 00:28:28,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:28:28,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-03 00:28:28,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2024-11-03 00:28:28,832 INFO L87 Difference]: Start difference. First operand 376 states and 490 transitions. Second operand has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:29,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:28:29,376 INFO L93 Difference]: Finished difference Result 562 states and 733 transitions. [2024-11-03 00:28:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-03 00:28:29,377 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 74 [2024-11-03 00:28:29,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:28:29,379 INFO L225 Difference]: With dead ends: 562 [2024-11-03 00:28:29,379 INFO L226 Difference]: Without dead ends: 439 [2024-11-03 00:28:29,380 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2024-11-03 00:28:29,381 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 109 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-03 00:28:29,381 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 408 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-03 00:28:29,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2024-11-03 00:28:29,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 422. [2024-11-03 00:28:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 412 states have (on average 1.2936893203883495) internal successors, (533), 412 states have internal predecessors, (533), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2024-11-03 00:28:29,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 554 transitions. [2024-11-03 00:28:29,437 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 554 transitions. Word has length 74 [2024-11-03 00:28:29,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:28:29,437 INFO L471 AbstractCegarLoop]: Abstraction has 422 states and 554 transitions. [2024-11-03 00:28:29,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:29,438 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 554 transitions. [2024-11-03 00:28:29,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-03 00:28:29,439 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:28:29,439 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 6, 4, 4, 4, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2024-11-03 00:28:29,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-03 00:28:29,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:29,640 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:28:29,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:28:29,641 INFO L85 PathProgramCache]: Analyzing trace with hash 317326867, now seen corresponding path program 6 times [2024-11-03 00:28:29,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:28:29,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18301626] [2024-11-03 00:28:29,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:28:29,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:29,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:29,642 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-03 00:28:29,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-03 00:28:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:28:29,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-03 00:28:29,736 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:28:30,515 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-03 00:28:30,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 15 [2024-11-03 00:28:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 61 proven. 20 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-03 00:28:30,546 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:28:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 61 proven. 20 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-03 00:28:31,103 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:28:31,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18301626] [2024-11-03 00:28:31,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [18301626] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 00:28:31,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 00:28:31,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2024-11-03 00:28:31,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907533108] [2024-11-03 00:28:31,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 00:28:31,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-03 00:28:31,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:28:31,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-03 00:28:31,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2024-11-03 00:28:31,105 INFO L87 Difference]: Start difference. First operand 422 states and 554 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:34,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:28:34,012 INFO L93 Difference]: Finished difference Result 734 states and 961 transitions. [2024-11-03 00:28:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-03 00:28:34,013 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 74 [2024-11-03 00:28:34,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:28:34,016 INFO L225 Difference]: With dead ends: 734 [2024-11-03 00:28:34,016 INFO L226 Difference]: Without dead ends: 536 [2024-11-03 00:28:34,018 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=422, Invalid=1834, Unknown=0, NotChecked=0, Total=2256 [2024-11-03 00:28:34,018 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-03 00:28:34,019 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 417 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-03 00:28:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2024-11-03 00:28:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 453. [2024-11-03 00:28:34,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 443 states have (on average 1.3047404063205417) internal successors, (578), 443 states have internal predecessors, (578), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2024-11-03 00:28:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 599 transitions. [2024-11-03 00:28:34,096 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 599 transitions. Word has length 74 [2024-11-03 00:28:34,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:28:34,097 INFO L471 AbstractCegarLoop]: Abstraction has 453 states and 599 transitions. [2024-11-03 00:28:34,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:34,097 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 599 transitions. [2024-11-03 00:28:34,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-03 00:28:34,098 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:28:34,098 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 6, 4, 4, 4, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2024-11-03 00:28:34,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-03 00:28:34,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:34,299 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:28:34,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:28:34,300 INFO L85 PathProgramCache]: Analyzing trace with hash 222308055, now seen corresponding path program 7 times [2024-11-03 00:28:34,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:28:34,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897966153] [2024-11-03 00:28:34,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:28:34,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:34,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:34,302 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-03 00:28:34,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-03 00:28:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:28:34,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-03 00:28:34,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:28:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-11-03 00:28:34,495 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:28:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-11-03 00:28:34,586 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:28:34,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897966153] [2024-11-03 00:28:34,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [897966153] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 00:28:34,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 00:28:34,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-03 00:28:34,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314186113] [2024-11-03 00:28:34,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 00:28:34,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-03 00:28:34,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:28:34,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-03 00:28:34,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-03 00:28:34,587 INFO L87 Difference]: Start difference. First operand 453 states and 599 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:34,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:28:34,716 INFO L93 Difference]: Finished difference Result 576 states and 757 transitions. [2024-11-03 00:28:34,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-03 00:28:34,717 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 74 [2024-11-03 00:28:34,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:28:34,720 INFO L225 Difference]: With dead ends: 576 [2024-11-03 00:28:34,720 INFO L226 Difference]: Without dead ends: 569 [2024-11-03 00:28:34,720 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-03 00:28:34,721 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 18 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 00:28:34,721 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 212 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 00:28:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2024-11-03 00:28:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2024-11-03 00:28:34,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 559 states have (on average 1.2826475849731664) internal successors, (717), 559 states have internal predecessors, (717), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2024-11-03 00:28:34,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 738 transitions. [2024-11-03 00:28:34,811 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 738 transitions. Word has length 74 [2024-11-03 00:28:34,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:28:34,811 INFO L471 AbstractCegarLoop]: Abstraction has 569 states and 738 transitions. [2024-11-03 00:28:34,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 00:28:34,812 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 738 transitions. [2024-11-03 00:28:34,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-03 00:28:34,813 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:28:34,814 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 00:28:34,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-03 00:28:35,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:35,022 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:28:35,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:28:35,022 INFO L85 PathProgramCache]: Analyzing trace with hash 975835893, now seen corresponding path program 8 times [2024-11-03 00:28:35,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:28:35,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373733017] [2024-11-03 00:28:35,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:28:35,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:35,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:35,024 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-03 00:28:35,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-03 00:28:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:28:35,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-03 00:28:35,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:28:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 92 proven. 345 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-03 00:28:36,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:28:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 310 proven. 37 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-11-03 00:28:37,203 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:28:37,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373733017] [2024-11-03 00:28:37,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1373733017] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 00:28:37,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 00:28:37,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16] total 40 [2024-11-03 00:28:37,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076000703] [2024-11-03 00:28:37,204 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 00:28:37,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-03 00:28:37,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:28:37,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-03 00:28:37,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1336, Unknown=0, NotChecked=0, Total=1560 [2024-11-03 00:28:37,206 INFO L87 Difference]: Start difference. First operand 569 states and 738 transitions. Second operand has 40 states, 40 states have (on average 3.125) internal successors, (125), 40 states have internal predecessors, (125), 3 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-03 00:28:43,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-03 00:28:47,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-03 00:28:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:28:50,278 INFO L93 Difference]: Finished difference Result 1902 states and 2442 transitions. [2024-11-03 00:28:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-11-03 00:28:50,279 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.125) internal successors, (125), 40 states have internal predecessors, (125), 3 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 108 [2024-11-03 00:28:50,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:28:50,286 INFO L225 Difference]: With dead ends: 1902 [2024-11-03 00:28:50,286 INFO L226 Difference]: Without dead ends: 1618 [2024-11-03 00:28:50,289 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2611 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1086, Invalid=8034, Unknown=0, NotChecked=0, Total=9120 [2024-11-03 00:28:50,290 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 122 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 3172 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 3190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 3172 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2024-11-03 00:28:50,290 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 1185 Invalid, 3190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 3172 Invalid, 2 Unknown, 0 Unchecked, 10.6s Time] [2024-11-03 00:28:50,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2024-11-03 00:28:50,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1096. [2024-11-03 00:28:50,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1085 states have (on average 1.2617511520737328) internal successors, (1369), 1084 states have internal predecessors, (1369), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-03 00:28:50,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1393 transitions. [2024-11-03 00:28:50,474 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1393 transitions. Word has length 108 [2024-11-03 00:28:50,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:28:50,474 INFO L471 AbstractCegarLoop]: Abstraction has 1096 states and 1393 transitions. [2024-11-03 00:28:50,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.125) internal successors, (125), 40 states have internal predecessors, (125), 3 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-03 00:28:50,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1393 transitions. [2024-11-03 00:28:50,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-03 00:28:50,477 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:28:50,477 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 10, 6, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 00:28:50,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-03 00:28:50,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:50,678 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:28:50,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:28:50,678 INFO L85 PathProgramCache]: Analyzing trace with hash -45232461, now seen corresponding path program 9 times [2024-11-03 00:28:50,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:28:50,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047806924] [2024-11-03 00:28:50,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:28:50,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:28:50,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:28:50,680 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-03 00:28:50,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-03 00:28:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:28:50,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-03 00:28:50,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:28:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 187 proven. 230 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-03 00:28:51,842 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:28:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 200 proven. 205 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-03 00:28:54,323 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:28:54,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047806924] [2024-11-03 00:28:54,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2047806924] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 00:28:54,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 00:28:54,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2024-11-03 00:28:54,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4517552] [2024-11-03 00:28:54,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 00:28:54,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-03 00:28:54,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:28:54,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-03 00:28:54,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2024-11-03 00:28:54,327 INFO L87 Difference]: Start difference. First operand 1096 states and 1393 transitions. Second operand has 41 states, 41 states have (on average 2.975609756097561) internal successors, (122), 41 states have internal predecessors, (122), 3 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-03 00:29:02,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-03 00:29:06,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-03 00:29:14,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-03 00:29:18,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-03 00:29:22,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 00:29:22,162 INFO L93 Difference]: Finished difference Result 2251 states and 2829 transitions. [2024-11-03 00:29:22,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2024-11-03 00:29:22,164 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.975609756097561) internal successors, (122), 41 states have internal predecessors, (122), 3 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 108 [2024-11-03 00:29:22,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 00:29:22,171 INFO L225 Difference]: With dead ends: 2251 [2024-11-03 00:29:22,171 INFO L226 Difference]: Without dead ends: 2037 [2024-11-03 00:29:22,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=2896, Invalid=18274, Unknown=0, NotChecked=0, Total=21170 [2024-11-03 00:29:22,177 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 229 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 2137 mSolverCounterSat, 33 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 2174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2137 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2024-11-03 00:29:22,177 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 805 Invalid, 2174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2137 Invalid, 4 Unknown, 0 Unchecked, 18.2s Time] [2024-11-03 00:29:22,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2024-11-03 00:29:22,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1623. [2024-11-03 00:29:22,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1612 states have (on average 1.2586848635235732) internal successors, (2029), 1611 states have internal predecessors, (2029), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-03 00:29:22,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 2053 transitions. [2024-11-03 00:29:22,490 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 2053 transitions. Word has length 108 [2024-11-03 00:29:22,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 00:29:22,490 INFO L471 AbstractCegarLoop]: Abstraction has 1623 states and 2053 transitions. [2024-11-03 00:29:22,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.975609756097561) internal successors, (122), 41 states have internal predecessors, (122), 3 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-03 00:29:22,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 2053 transitions. [2024-11-03 00:29:22,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-03 00:29:22,494 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 00:29:22,494 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 11, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 00:29:22,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-03 00:29:22,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:29:22,695 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 00:29:22,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 00:29:22,696 INFO L85 PathProgramCache]: Analyzing trace with hash -22600207, now seen corresponding path program 10 times [2024-11-03 00:29:22,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 00:29:22,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937120640] [2024-11-03 00:29:22,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 00:29:22,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-03 00:29:22,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 00:29:22,698 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-03 00:29:22,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-03 00:29:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 00:29:22,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-03 00:29:22,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 00:29:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 10 proven. 415 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-03 00:29:25,758 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 00:29:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 48 proven. 368 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-03 00:29:29,149 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 00:29:29,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937120640] [2024-11-03 00:29:29,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1937120640] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 00:29:29,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 00:29:29,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 52 [2024-11-03 00:29:29,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783200549] [2024-11-03 00:29:29,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 00:29:29,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-03 00:29:29,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 00:29:29,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-03 00:29:29,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=2174, Unknown=0, NotChecked=0, Total=2652 [2024-11-03 00:29:29,151 INFO L87 Difference]: Start difference. First operand 1623 states and 2053 transitions. Second operand has 52 states, 52 states have (on average 2.576923076923077) internal successors, (134), 52 states have internal predecessors, (134), 3 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-03 00:29:36,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-03 00:29:41,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []