/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 'cvc4 --incremental --print-success --lang smt' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/neural-networks/softmax_7_unsafe.c-amalgamation.i -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-03 03:52:22,410 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-03 03:52:22,447 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 03:52:22,454 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-03 03:52:22,454 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-03 03:52:22,467 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-03 03:52:22,468 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-03 03:52:22,468 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-03 03:52:22,468 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-03 03:52:22,469 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-03 03:52:22,469 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-03 03:52:22,469 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-03 03:52:22,469 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-03 03:52:22,470 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-03 03:52:22,470 INFO L153 SettingsManager]: * Use SBE=true [2024-11-03 03:52:22,470 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-03 03:52:22,470 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-03 03:52:22,470 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-03 03:52:22,471 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-03 03:52:22,471 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-03 03:52:22,471 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-03 03:52:22,471 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-03 03:52:22,472 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-03 03:52:22,472 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-03 03:52:22,472 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-03 03:52:22,472 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-03 03:52:22,472 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-03 03:52:22,473 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-03 03:52:22,473 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-03 03:52:22,473 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-03 03:52:22,473 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-03 03:52:22,473 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-03 03:52:22,474 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-03 03:52:22,474 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-03 03:52:22,474 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 03:52:22,474 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-03 03:52:22,474 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-03 03:52:22,475 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-03 03:52:22,475 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-03 03:52:22,475 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-03 03:52:22,475 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-03 03:52:22,475 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-03 03:52:22,475 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-03 03:52:22,475 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-03 03:52:22,476 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-11-03 03:52:22,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-03 03:52:22,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-03 03:52:22,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-03 03:52:22,646 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-03 03:52:22,646 INFO L274 PluginConnector]: CDTParser initialized [2024-11-03 03:52:22,647 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/neural-networks/softmax_7_unsafe.c-amalgamation.i [2024-11-03 03:52:23,827 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-03 03:52:24,058 INFO L384 CDTParser]: Found 1 translation units. [2024-11-03 03:52:24,059 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/neural-networks/softmax_7_unsafe.c-amalgamation.i [2024-11-03 03:52:24,076 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8041c823/199730603f704da6978e12e581b1e6d8/FLAG08acb515d [2024-11-03 03:52:24,090 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8041c823/199730603f704da6978e12e581b1e6d8 [2024-11-03 03:52:24,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-03 03:52:24,094 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-03 03:52:24,095 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-03 03:52:24,096 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-03 03:52:24,100 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-03 03:52:24,100 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:52:24" (1/1) ... [2024-11-03 03:52:24,101 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d119318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:24, skipping insertion in model container [2024-11-03 03:52:24,101 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:52:24" (1/1) ... [2024-11-03 03:52:24,149 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-03 03:52:24,499 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/neural-networks/softmax_7_unsafe.c-amalgamation.i[63474,63487] [2024-11-03 03:52:24,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 03:52:24,508 INFO L200 MainTranslator]: Completed pre-run [2024-11-03 03:52:24,570 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/neural-networks/softmax_7_unsafe.c-amalgamation.i[63474,63487] [2024-11-03 03:52:24,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 03:52:24,671 INFO L204 MainTranslator]: Completed translation [2024-11-03 03:52:24,671 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:24 WrapperNode [2024-11-03 03:52:24,671 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-03 03:52:24,672 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-03 03:52:24,672 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-03 03:52:24,672 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-03 03:52:24,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:24" (1/1) ... [2024-11-03 03:52:24,694 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:24" (1/1) ... [2024-11-03 03:52:24,716 INFO L138 Inliner]: procedures = 562, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 110 [2024-11-03 03:52:24,716 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-03 03:52:24,717 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-03 03:52:24,717 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-03 03:52:24,717 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-03 03:52:24,724 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:24" (1/1) ... [2024-11-03 03:52:24,724 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:24" (1/1) ... [2024-11-03 03:52:24,727 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:24" (1/1) ... [2024-11-03 03:52:24,736 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [2, 7, 4, 8]. 38 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 4 writes are split as follows [0, 0, 2, 2]. [2024-11-03 03:52:24,736 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:24" (1/1) ... [2024-11-03 03:52:24,736 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:24" (1/1) ... [2024-11-03 03:52:24,746 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:24" (1/1) ... [2024-11-03 03:52:24,748 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:24" (1/1) ... [2024-11-03 03:52:24,750 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:24" (1/1) ... [2024-11-03 03:52:24,751 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:24" (1/1) ... [2024-11-03 03:52:24,754 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-03 03:52:24,754 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-03 03:52:24,754 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-03 03:52:24,754 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-03 03:52:24,755 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:24" (1/1) ... [2024-11-03 03:52:24,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 03:52:24,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 03:52:24,775 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 03:52:24,777 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 03:52:24,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4#0 [2024-11-03 03:52:24,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4#1 [2024-11-03 03:52:24,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4#2 [2024-11-03 03:52:24,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4#3 [2024-11-03 03:52:24,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-03 03:52:24,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-03 03:52:24,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-03 03:52:24,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-03 03:52:24,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-11-03 03:52:24,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-03 03:52:24,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-03 03:52:24,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-03 03:52:24,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4#0 [2024-11-03 03:52:24,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4#1 [2024-11-03 03:52:24,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4#2 [2024-11-03 03:52:24,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4#3 [2024-11-03 03:52:24,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-03 03:52:24,880 INFO L238 CfgBuilder]: Building ICFG [2024-11-03 03:52:24,881 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-03 03:52:25,426 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-11-03 03:52:25,427 INFO L287 CfgBuilder]: Performing block encoding [2024-11-03 03:52:25,434 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-03 03:52:25,434 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-03 03:52:25,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:52:25 BoogieIcfgContainer [2024-11-03 03:52:25,434 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-03 03:52:25,436 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-03 03:52:25,436 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-03 03:52:25,443 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-03 03:52:25,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:52:24" (1/3) ... [2024-11-03 03:52:25,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c15d4bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:52:25, skipping insertion in model container [2024-11-03 03:52:25,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:24" (2/3) ... [2024-11-03 03:52:25,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c15d4bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:52:25, skipping insertion in model container [2024-11-03 03:52:25,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:52:25" (3/3) ... [2024-11-03 03:52:25,445 INFO L112 eAbstractionObserver]: Analyzing ICFG softmax_7_unsafe.c-amalgamation.i [2024-11-03 03:52:25,456 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-03 03:52:25,456 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-03 03:52:25,490 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-03 03:52:25,494 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;@56787ecf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-03 03:52:25,494 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-03 03:52:25,499 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-03 03:52:25,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-03 03:52:25,503 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 03:52:25,504 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 03:52:25,504 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 03:52:25,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 03:52:25,507 INFO L85 PathProgramCache]: Analyzing trace with hash -223873175, now seen corresponding path program 1 times [2024-11-03 03:52:25,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 03:52:25,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937529496] [2024-11-03 03:52:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 03:52:25,514 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 03:52:25,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 03:52:25,516 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 03:52:25,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-03 03:52:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 03:52:25,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-03 03:52:25,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 03:52:25,649 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 03:52:25,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 03:52:25,652 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 03:52:25,652 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 03:52:25,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937529496] [2024-11-03 03:52:25,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1937529496] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 03:52:25,653 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 03:52:25,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-11-03 03:52:25,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426025579] [2024-11-03 03:52:25,654 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 03:52:25,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-03 03:52:25,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 03:52:25,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-03 03:52:25,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-03 03:52:25,671 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-03 03:52:25,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 03:52:25,679 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2024-11-03 03:52:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-03 03:52:25,684 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-03 03:52:25,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 03:52:25,690 INFO L225 Difference]: With dead ends: 47 [2024-11-03 03:52:25,690 INFO L226 Difference]: Without dead ends: 21 [2024-11-03 03:52:25,692 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-03 03:52:25,694 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 03:52:25,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 03:52:25,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-03 03:52:25,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-03 03:52:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-03 03:52:25,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-11-03 03:52:25,715 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2024-11-03 03:52:25,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 03:52:25,715 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-11-03 03:52:25,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-03 03:52:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-11-03 03:52:25,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-03 03:52:25,716 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 03:52:25,716 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 03:52:25,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0 [2024-11-03 03:52:25,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 03:52:25,917 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 03:52:25,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 03:52:25,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1702451998, now seen corresponding path program 1 times [2024-11-03 03:52:25,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 03:52:25,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463131982] [2024-11-03 03:52:25,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 03:52:25,918 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 03:52:25,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 03:52:25,920 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 03:52:25,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-03 03:52:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 03:52:26,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-03 03:52:26,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 03:52:26,086 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 03:52:26,086 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 03:52:26,100 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 03:52:26,101 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 03:52:26,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463131982] [2024-11-03 03:52:26,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1463131982] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 03:52:26,103 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 03:52:26,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-03 03:52:26,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246458201] [2024-11-03 03:52:26,103 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 03:52:26,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-03 03:52:26,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 03:52:26,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-03 03:52:26,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-03 03:52:26,105 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-03 03:52:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 03:52:26,743 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2024-11-03 03:52:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-03 03:52:26,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-03 03:52:26,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 03:52:26,744 INFO L225 Difference]: With dead ends: 36 [2024-11-03 03:52:26,744 INFO L226 Difference]: Without dead ends: 24 [2024-11-03 03:52:26,744 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 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 03:52:26,745 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-03 03:52:26,745 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 31 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-03 03:52:26,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-03 03:52:26,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2024-11-03 03:52:26,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-03 03:52:26,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-11-03 03:52:26,749 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2024-11-03 03:52:26,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 03:52:26,749 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-11-03 03:52:26,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-03 03:52:26,749 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-11-03 03:52:26,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-03 03:52:26,750 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 03:52:26,750 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 03:52:26,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0 [2024-11-03 03:52:26,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 03:52:26,951 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 03:52:26,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 03:52:26,951 INFO L85 PathProgramCache]: Analyzing trace with hash -939866796, now seen corresponding path program 1 times [2024-11-03 03:52:26,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 03:52:26,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444606851] [2024-11-03 03:52:26,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 03:52:26,952 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 03:52:26,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 03:52:26,954 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 03:52:26,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-11-03 03:52:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 03:52:27,117 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-03 03:52:27,119 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 03:52:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-03 03:52:27,166 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 03:52:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-03 03:52:27,209 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 03:52:27,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444606851] [2024-11-03 03:52:27,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [444606851] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 03:52:27,209 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 03:52:27,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-11-03 03:52:27,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468476891] [2024-11-03 03:52:27,209 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 03:52:27,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-03 03:52:27,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 03:52:27,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-03 03:52:27,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-03 03:52:27,210 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-03 03:52:28,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 03:52:28,027 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2024-11-03 03:52:28,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-03 03:52:28,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-03 03:52:28,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 03:52:28,028 INFO L225 Difference]: With dead ends: 37 [2024-11-03 03:52:28,028 INFO L226 Difference]: Without dead ends: 28 [2024-11-03 03:52:28,028 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-03 03:52:28,029 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-03 03:52:28,029 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 36 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-03 03:52:28,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-03 03:52:28,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-03 03:52:28,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-03 03:52:28,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-03 03:52:28,033 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2024-11-03 03:52:28,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 03:52:28,034 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-03 03:52:28,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-03 03:52:28,034 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-03 03:52:28,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-03 03:52:28,034 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 03:52:28,034 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 03:52:28,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2024-11-03 03:52:28,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 03:52:28,235 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 03:52:28,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 03:52:28,236 INFO L85 PathProgramCache]: Analyzing trace with hash -709993652, now seen corresponding path program 1 times [2024-11-03 03:52:28,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 03:52:28,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896271985] [2024-11-03 03:52:28,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 03:52:28,236 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 03:52:28,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 03:52:28,239 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 03:52:28,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-11-03 03:52:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 03:52:28,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-03 03:52:28,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 03:52:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 03:52:28,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 03:52:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 03:52:28,752 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 03:52:28,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896271985] [2024-11-03 03:52:28,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1896271985] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 03:52:28,753 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 03:52:28,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-03 03:52:28,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094050555] [2024-11-03 03:52:28,753 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 03:52:28,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-03 03:52:28,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 03:52:28,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-03 03:52:28,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-03 03:52:28,754 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-03 03:52:28,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 03:52:28,860 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2024-11-03 03:52:28,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-03 03:52:28,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-03 03:52:28,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 03:52:28,861 INFO L225 Difference]: With dead ends: 34 [2024-11-03 03:52:28,861 INFO L226 Difference]: Without dead ends: 31 [2024-11-03 03:52:28,862 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 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 03:52:28,862 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 03:52:28,863 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 43 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 03:52:28,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-03 03:52:28,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-03 03:52:28,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-03 03:52:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-11-03 03:52:28,866 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 26 [2024-11-03 03:52:28,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 03:52:28,867 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-11-03 03:52:28,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-03 03:52:28,867 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-11-03 03:52:28,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-03 03:52:28,867 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 03:52:28,867 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 03:52:28,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2024-11-03 03:52:29,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-03 03:52:29,068 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 03:52:29,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 03:52:29,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1268080504, now seen corresponding path program 1 times [2024-11-03 03:52:29,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 03:52:29,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897051973] [2024-11-03 03:52:29,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 03:52:29,069 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-03 03:52:29,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-03 03:52:29,070 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 03:52:29,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2024-11-03 03:52:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-03 03:52:35,222 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-03 03:52:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat