/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-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-04 20:58:56,288 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-04 20:58:56,353 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf [2024-11-04 20:58:56,360 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-04 20:58:56,360 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-04 20:58:56,389 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-04 20:58:56,390 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-04 20:58:56,390 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-04 20:58:56,390 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-04 20:58:56,391 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-04 20:58:56,391 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-04 20:58:56,391 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-04 20:58:56,392 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-04 20:58:56,392 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-04 20:58:56,393 INFO L153 SettingsManager]: * Use SBE=true [2024-11-04 20:58:56,393 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-04 20:58:56,394 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-04 20:58:56,394 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-04 20:58:56,395 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-04 20:58:56,395 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-04 20:58:56,395 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-04 20:58:56,399 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-04 20:58:56,399 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-04 20:58:56,400 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-04 20:58:56,400 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-04 20:58:56,400 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-04 20:58:56,400 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-04 20:58:56,401 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-04 20:58:56,401 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-04 20:58:56,401 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-04 20:58:56,401 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-04 20:58:56,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-04 20:58:56,402 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-04 20:58:56,402 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-04 20:58:56,402 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-04 20:58:56,403 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-04 20:58:56,403 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-04 20:58:56,404 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-04 20:58:56,404 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-04 20:58:56,405 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-04 20:58:56,405 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-04 20:58:56,405 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-11-04 20:58:56,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-04 20:58:56,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-04 20:58:56,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-04 20:58:56,657 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-04 20:58:56,658 INFO L274 PluginConnector]: CDTParser initialized [2024-11-04 20:58:56,659 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c [2024-11-04 20:58:58,113 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-04 20:58:58,381 INFO L384 CDTParser]: Found 1 translation units. [2024-11-04 20:58:58,382 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c [2024-11-04 20:58:58,403 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c31f3ae57/31ef4658603b4254a57bc78857234c01/FLAG6dafb9e9c [2024-11-04 20:58:58,421 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c31f3ae57/31ef4658603b4254a57bc78857234c01 [2024-11-04 20:58:58,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-04 20:58:58,426 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-04 20:58:58,428 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-04 20:58:58,429 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-04 20:58:58,438 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-04 20:58:58,438 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 08:58:58" (1/1) ... [2024-11-04 20:58:58,439 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217f8d84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:58:58, skipping insertion in model container [2024-11-04 20:58:58,440 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 08:58:58" (1/1) ... [2024-11-04 20:58:58,505 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-04 20:58:58,699 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c[1268,1281] [2024-11-04 20:58:58,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 20:58:59,009 INFO L200 MainTranslator]: Completed pre-run [2024-11-04 20:58:59,018 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c[1268,1281] [2024-11-04 20:58:59,161 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 20:58:59,177 INFO L204 MainTranslator]: Completed translation [2024-11-04 20:58:59,177 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:58:59 WrapperNode [2024-11-04 20:58:59,177 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-04 20:58:59,178 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-04 20:58:59,179 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-04 20:58:59,179 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-04 20:58:59,185 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:58:59" (1/1) ... [2024-11-04 20:58:59,229 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:58:59" (1/1) ... [2024-11-04 20:58:59,308 INFO L138 Inliner]: procedures = 18, calls = 107, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1594 [2024-11-04 20:58:59,308 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-04 20:58:59,309 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-04 20:58:59,309 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-04 20:58:59,310 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-04 20:58:59,320 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:58:59" (1/1) ... [2024-11-04 20:58:59,320 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:58:59" (1/1) ... [2024-11-04 20:58:59,336 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:58:59" (1/1) ... [2024-11-04 20:58:59,401 INFO L175 MemorySlicer]: Split 63 memory accesses to 4 slices as follows [2, 29, 8, 24]. 46 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 30 writes are split as follows [0, 14, 4, 12]. [2024-11-04 20:58:59,401 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:58:59" (1/1) ... [2024-11-04 20:58:59,401 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:58:59" (1/1) ... [2024-11-04 20:58:59,449 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:58:59" (1/1) ... [2024-11-04 20:58:59,460 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:58:59" (1/1) ... [2024-11-04 20:58:59,475 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:58:59" (1/1) ... [2024-11-04 20:58:59,490 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:58:59" (1/1) ... [2024-11-04 20:58:59,507 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-04 20:58:59,509 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-04 20:58:59,509 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-04 20:58:59,509 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-04 20:58:59,510 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:58:59" (1/1) ... [2024-11-04 20:58:59,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-04 20:58:59,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 20:58:59,543 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) [2024-11-04 20:58:59,546 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 [2024-11-04 20:58:59,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-04 20:58:59,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2024-11-04 20:58:59,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2024-11-04 20:58:59,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2024-11-04 20:58:59,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#3 [2024-11-04 20:58:59,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-04 20:58:59,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-04 20:58:59,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-04 20:58:59,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-11-04 20:58:59,577 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-04 20:58:59,577 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-04 20:58:59,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-04 20:58:59,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-04 20:58:59,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-04 20:58:59,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2024-11-04 20:58:59,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#1 [2024-11-04 20:58:59,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#2 [2024-11-04 20:58:59,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#3 [2024-11-04 20:58:59,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-04 20:58:59,862 INFO L238 CfgBuilder]: Building ICFG [2024-11-04 20:58:59,864 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-04 20:59:01,098 INFO L? ?]: Removed 1019 outVars from TransFormulas that were not future-live. [2024-11-04 20:59:01,098 INFO L287 CfgBuilder]: Performing block encoding [2024-11-04 20:59:01,111 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-04 20:59:01,111 INFO L316 CfgBuilder]: Removed 19 assume(true) statements. [2024-11-04 20:59:01,114 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 08:59:01 BoogieIcfgContainer [2024-11-04 20:59:01,114 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-04 20:59:01,117 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-04 20:59:01,117 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-04 20:59:01,121 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-04 20:59:01,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.11 08:58:58" (1/3) ... [2024-11-04 20:59:01,123 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77b5ef15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 08:59:01, skipping insertion in model container [2024-11-04 20:59:01,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:58:59" (2/3) ... [2024-11-04 20:59:01,123 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77b5ef15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 08:59:01, skipping insertion in model container [2024-11-04 20:59:01,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 08:59:01" (3/3) ... [2024-11-04 20:59:01,124 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c [2024-11-04 20:59:01,138 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-04 20:59:01,138 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-04 20:59:01,182 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-04 20:59:01,189 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;@7774f318, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-04 20:59:01,189 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-04 20:59:01,194 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 70 states have (on average 1.5714285714285714) internal successors, (110), 71 states have internal predecessors, (110), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-04 20:59:01,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-04 20:59:01,201 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:01,202 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2024-11-04 20:59:01,202 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:01,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:01,207 INFO L85 PathProgramCache]: Analyzing trace with hash -958431594, now seen corresponding path program 1 times [2024-11-04 20:59:01,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:01,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917989150] [2024-11-04 20:59:01,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:01,218 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:01,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:01,221 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) [2024-11-04 20:59:01,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-04 20:59:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:02,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-04 20:59:02,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-04 20:59:02,107 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-04 20:59:02,153 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:02,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917989150] [2024-11-04 20:59:02,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1917989150] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:59:02,154 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:59:02,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-11-04 20:59:02,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614482045] [2024-11-04 20:59:02,157 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:59:02,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-04 20:59:02,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:02,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-04 20:59:02,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-04 20:59:02,190 INFO L87 Difference]: Start difference. First operand has 78 states, 70 states have (on average 1.5714285714285714) internal successors, (110), 71 states have internal predecessors, (110), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-04 20:59:02,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:02,218 INFO L93 Difference]: Finished difference Result 149 states and 237 transitions. [2024-11-04 20:59:02,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-04 20:59:02,220 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2024-11-04 20:59:02,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:02,227 INFO L225 Difference]: With dead ends: 149 [2024-11-04 20:59:02,227 INFO L226 Difference]: Without dead ends: 75 [2024-11-04 20:59:02,231 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-04 20:59:02,235 INFO L432 NwaCegarLoop]: 97 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, 97 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 [2024-11-04 20:59:02,238 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 20:59:02,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-04 20:59:02,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-11-04 20:59:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 68 states have internal predecessors, (87), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-04 20:59:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2024-11-04 20:59:02,287 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 41 [2024-11-04 20:59:02,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:02,287 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2024-11-04 20:59:02,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-04 20:59:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2024-11-04 20:59:02,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-04 20:59:02,291 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:02,291 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2024-11-04 20:59:02,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Forceful destruction successful, exit code 0 [2024-11-04 20:59:02,495 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 [2024-11-04 20:59:02,496 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:02,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:02,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2099855424, now seen corresponding path program 1 times [2024-11-04 20:59:02,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:02,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203736023] [2024-11-04 20:59:02,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:02,498 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:02,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:02,501 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) [2024-11-04 20:59:02,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-04 20:59:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:03,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 20:59:03,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-04 20:59:03,308 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-04 20:59:03,349 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:03,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203736023] [2024-11-04 20:59:03,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1203736023] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:59:03,350 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:59:03,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 20:59:03,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912500102] [2024-11-04 20:59:03,350 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:59:03,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 20:59:03,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:03,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 20:59:03,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:03,353 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-04 20:59:03,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:03,392 INFO L93 Difference]: Finished difference Result 149 states and 194 transitions. [2024-11-04 20:59:03,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 20:59:03,393 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), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 41 [2024-11-04 20:59:03,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:03,394 INFO L225 Difference]: With dead ends: 149 [2024-11-04 20:59:03,394 INFO L226 Difference]: Without dead ends: 78 [2024-11-04 20:59:03,395 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:03,396 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 279 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 [2024-11-04 20:59:03,397 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 279 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 20:59:03,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-04 20:59:03,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-04 20:59:03,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 states have internal predecessors, (90), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-04 20:59:03,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2024-11-04 20:59:03,409 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 41 [2024-11-04 20:59:03,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:03,409 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2024-11-04 20:59:03,409 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), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-04 20:59:03,409 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2024-11-04 20:59:03,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-04 20:59:03,410 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:03,411 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2024-11-04 20:59:03,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0 [2024-11-04 20:59:03,614 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 [2024-11-04 20:59:03,615 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:03,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:03,616 INFO L85 PathProgramCache]: Analyzing trace with hash 963432764, now seen corresponding path program 1 times [2024-11-04 20:59:03,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:03,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000744113] [2024-11-04 20:59:03,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:03,617 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:03,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:03,619 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) [2024-11-04 20:59:03,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-11-04 20:59:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:04,340 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-04 20:59:04,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-04 20:59:04,390 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-04 20:59:04,462 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:04,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000744113] [2024-11-04 20:59:04,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1000744113] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 20:59:04,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 20:59:04,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-04 20:59:04,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238086465] [2024-11-04 20:59:04,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 20:59:04,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 20:59:04,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:04,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 20:59:04,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 20:59:04,466 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-04 20:59:04,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:04,537 INFO L93 Difference]: Finished difference Result 153 states and 198 transitions. [2024-11-04 20:59:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 20:59:04,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 45 [2024-11-04 20:59:04,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:04,542 INFO L225 Difference]: With dead ends: 153 [2024-11-04 20:59:04,542 INFO L226 Difference]: Without dead ends: 82 [2024-11-04 20:59:04,543 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 20:59:04,544 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:04,544 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 463 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 20:59:04,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-04 20:59:04,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-11-04 20:59:04,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 75 states have internal predecessors, (94), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-04 20:59:04,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2024-11-04 20:59:04,557 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 45 [2024-11-04 20:59:04,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:04,557 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2024-11-04 20:59:04,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-04 20:59:04,558 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2024-11-04 20:59:04,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-04 20:59:04,560 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:04,560 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2024-11-04 20:59:04,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2024-11-04 20:59:04,761 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 [2024-11-04 20:59:04,762 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:04,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:04,762 INFO L85 PathProgramCache]: Analyzing trace with hash 390562872, now seen corresponding path program 2 times [2024-11-04 20:59:04,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:04,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349473325] [2024-11-04 20:59:04,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:04,763 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:04,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:04,766 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) [2024-11-04 20:59:04,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-11-04 20:59:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:05,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 20:59:05,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-04 20:59:05,533 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-04 20:59:05,562 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:05,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349473325] [2024-11-04 20:59:05,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [349473325] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:59:05,563 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:59:05,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 20:59:05,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562768576] [2024-11-04 20:59:05,563 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:59:05,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 20:59:05,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:05,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 20:59:05,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:05,565 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-04 20:59:05,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:05,604 INFO L93 Difference]: Finished difference Result 153 states and 197 transitions. [2024-11-04 20:59:05,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 20:59:05,610 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), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 49 [2024-11-04 20:59:05,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:05,611 INFO L225 Difference]: With dead ends: 153 [2024-11-04 20:59:05,611 INFO L226 Difference]: Without dead ends: 85 [2024-11-04 20:59:05,611 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:05,612 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:05,613 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 20:59:05,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-04 20:59:05,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-11-04 20:59:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 78 states have internal predecessors, (97), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-04 20:59:05,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2024-11-04 20:59:05,622 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 49 [2024-11-04 20:59:05,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:05,623 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2024-11-04 20:59:05,623 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), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-04 20:59:05,623 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2024-11-04 20:59:05,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-04 20:59:05,624 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:05,624 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 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] [2024-11-04 20:59:05,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2024-11-04 20:59:05,825 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 [2024-11-04 20:59:05,825 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:05,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:05,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1998153908, now seen corresponding path program 1 times [2024-11-04 20:59:05,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:05,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587849151] [2024-11-04 20:59:05,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:05,827 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:05,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:05,829 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) [2024-11-04 20:59:05,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2024-11-04 20:59:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:06,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 20:59:06,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-04 20:59:06,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-04 20:59:06,633 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:06,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587849151] [2024-11-04 20:59:06,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [587849151] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:59:06,634 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:59:06,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 20:59:06,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852293053] [2024-11-04 20:59:06,634 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:59:06,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 20:59:06,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:06,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 20:59:06,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:06,636 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-04 20:59:06,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:06,674 INFO L93 Difference]: Finished difference Result 153 states and 196 transitions. [2024-11-04 20:59:06,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 20:59:06,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 53 [2024-11-04 20:59:06,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:06,677 INFO L225 Difference]: With dead ends: 153 [2024-11-04 20:59:06,677 INFO L226 Difference]: Without dead ends: 88 [2024-11-04 20:59:06,678 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:06,679 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:06,679 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 20:59:06,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-04 20:59:06,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-11-04 20:59:06,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 81 states have internal predecessors, (100), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-04 20:59:06,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 110 transitions. [2024-11-04 20:59:06,686 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 110 transitions. Word has length 53 [2024-11-04 20:59:06,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:06,687 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 110 transitions. [2024-11-04 20:59:06,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-04 20:59:06,687 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 110 transitions. [2024-11-04 20:59:06,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-04 20:59:06,688 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:06,688 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 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] [2024-11-04 20:59:06,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2024-11-04 20:59:06,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:06,889 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:06,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:06,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1928044208, now seen corresponding path program 1 times [2024-11-04 20:59:06,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:06,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114968340] [2024-11-04 20:59:06,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:06,891 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:06,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:06,892 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:06,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-11-04 20:59:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:07,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-04 20:59:07,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-04 20:59:07,656 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-04 20:59:07,706 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:07,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114968340] [2024-11-04 20:59:07,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [114968340] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 20:59:07,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 20:59:07,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-04 20:59:07,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528495412] [2024-11-04 20:59:07,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 20:59:07,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 20:59:07,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:07,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 20:59:07,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 20:59:07,708 INFO L87 Difference]: Start difference. First operand 88 states and 110 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-04 20:59:07,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:07,786 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2024-11-04 20:59:07,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 20:59:07,791 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 57 [2024-11-04 20:59:07,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:07,792 INFO L225 Difference]: With dead ends: 157 [2024-11-04 20:59:07,792 INFO L226 Difference]: Without dead ends: 92 [2024-11-04 20:59:07,793 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 20:59:07,794 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:07,794 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 641 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 20:59:07,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-04 20:59:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-04 20:59:07,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 85 states have (on average 1.223529411764706) internal successors, (104), 85 states have internal predecessors, (104), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-04 20:59:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2024-11-04 20:59:07,802 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 57 [2024-11-04 20:59:07,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:07,802 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2024-11-04 20:59:07,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-04 20:59:07,802 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2024-11-04 20:59:07,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-04 20:59:07,803 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:07,803 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 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] [2024-11-04 20:59:07,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2024-11-04 20:59:08,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:08,005 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:08,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:08,005 INFO L85 PathProgramCache]: Analyzing trace with hash 779777708, now seen corresponding path program 2 times [2024-11-04 20:59:08,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:08,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326595853] [2024-11-04 20:59:08,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:08,006 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:08,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:08,008 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:08,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-11-04 20:59:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:08,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-04 20:59:08,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-04 20:59:09,247 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-04 20:59:10,144 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:10,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326595853] [2024-11-04 20:59:10,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [326595853] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:59:10,144 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:59:10,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2024-11-04 20:59:10,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889242553] [2024-11-04 20:59:10,145 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:59:10,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 20:59:10,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:10,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 20:59:10,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-04 20:59:10,147 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-04 20:59:10,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:10,573 INFO L93 Difference]: Finished difference Result 106 states and 133 transitions. [2024-11-04 20:59:10,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-04 20:59:10,574 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 61 [2024-11-04 20:59:10,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:10,575 INFO L225 Difference]: With dead ends: 106 [2024-11-04 20:59:10,575 INFO L226 Difference]: Without dead ends: 104 [2024-11-04 20:59:10,576 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-04 20:59:10,577 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 156 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:10,578 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 413 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-04 20:59:10,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-04 20:59:10,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2024-11-04 20:59:10,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 92 states have (on average 1.2065217391304348) internal successors, (111), 92 states have internal predecessors, (111), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 20:59:10,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 131 transitions. [2024-11-04 20:59:10,596 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 131 transitions. Word has length 61 [2024-11-04 20:59:10,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:10,598 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 131 transitions. [2024-11-04 20:59:10,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-04 20:59:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 131 transitions. [2024-11-04 20:59:10,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-04 20:59:10,600 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:10,600 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:59:10,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2024-11-04 20:59:10,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:10,801 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:10,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:10,802 INFO L85 PathProgramCache]: Analyzing trace with hash -466492681, now seen corresponding path program 1 times [2024-11-04 20:59:10,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:10,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924384687] [2024-11-04 20:59:10,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:10,803 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:10,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:10,805 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:10,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2024-11-04 20:59:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:12,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 1528 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 20:59:12,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-04 20:59:12,585 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2024-11-04 20:59:12,642 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:12,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924384687] [2024-11-04 20:59:12,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [924384687] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:59:12,643 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:59:12,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 20:59:12,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104659560] [2024-11-04 20:59:12,643 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:59:12,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 20:59:12,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:12,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 20:59:12,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:12,647 INFO L87 Difference]: Start difference. First operand 104 states and 131 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:12,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:12,696 INFO L93 Difference]: Finished difference Result 171 states and 219 transitions. [2024-11-04 20:59:12,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 20:59:12,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 124 [2024-11-04 20:59:12,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:12,699 INFO L225 Difference]: With dead ends: 171 [2024-11-04 20:59:12,699 INFO L226 Difference]: Without dead ends: 107 [2024-11-04 20:59:12,700 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:12,701 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:12,701 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 20:59:12,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-04 20:59:12,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2024-11-04 20:59:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 95 states have (on average 1.2) internal successors, (114), 95 states have internal predecessors, (114), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 20:59:12,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2024-11-04 20:59:12,725 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 124 [2024-11-04 20:59:12,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:12,726 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2024-11-04 20:59:12,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2024-11-04 20:59:12,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-04 20:59:12,727 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:12,727 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:59:12,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2024-11-04 20:59:12,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:12,928 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:12,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:12,929 INFO L85 PathProgramCache]: Analyzing trace with hash 57551859, now seen corresponding path program 1 times [2024-11-04 20:59:12,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:12,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627497396] [2024-11-04 20:59:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:12,929 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:12,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:12,932 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:12,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-11-04 20:59:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:14,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 1540 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 20:59:14,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-04 20:59:14,661 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-04 20:59:14,707 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:14,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627497396] [2024-11-04 20:59:14,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [627497396] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:59:14,707 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:59:14,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 20:59:14,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343246210] [2024-11-04 20:59:14,708 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:59:14,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 20:59:14,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:14,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 20:59:14,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:14,711 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:14,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:14,752 INFO L93 Difference]: Finished difference Result 177 states and 225 transitions. [2024-11-04 20:59:14,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 20:59:14,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 128 [2024-11-04 20:59:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:14,757 INFO L225 Difference]: With dead ends: 177 [2024-11-04 20:59:14,757 INFO L226 Difference]: Without dead ends: 110 [2024-11-04 20:59:14,757 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:14,775 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:14,775 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 20:59:14,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-04 20:59:14,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2024-11-04 20:59:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 98 states have internal predecessors, (117), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 20:59:14,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 137 transitions. [2024-11-04 20:59:14,786 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 137 transitions. Word has length 128 [2024-11-04 20:59:14,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:14,787 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 137 transitions. [2024-11-04 20:59:14,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:14,787 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 137 transitions. [2024-11-04 20:59:14,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-04 20:59:14,788 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:14,788 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:59:14,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2024-11-04 20:59:14,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:14,989 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:14,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:14,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1200629359, now seen corresponding path program 1 times [2024-11-04 20:59:14,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:14,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127587538] [2024-11-04 20:59:14,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:14,990 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:14,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:14,993 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:14,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2024-11-04 20:59:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:16,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 1552 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 20:59:16,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-11-04 20:59:16,730 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2024-11-04 20:59:16,778 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:16,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127587538] [2024-11-04 20:59:16,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1127587538] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:59:16,778 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:59:16,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 20:59:16,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037082849] [2024-11-04 20:59:16,779 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:59:16,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 20:59:16,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:16,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 20:59:16,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:16,781 INFO L87 Difference]: Start difference. First operand 110 states and 137 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:16,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:16,827 INFO L93 Difference]: Finished difference Result 183 states and 231 transitions. [2024-11-04 20:59:16,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 20:59:16,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 132 [2024-11-04 20:59:16,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:16,830 INFO L225 Difference]: With dead ends: 183 [2024-11-04 20:59:16,831 INFO L226 Difference]: Without dead ends: 113 [2024-11-04 20:59:16,831 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:16,831 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:16,832 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 20:59:16,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-04 20:59:16,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2024-11-04 20:59:16,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 101 states have (on average 1.188118811881188) internal successors, (120), 101 states have internal predecessors, (120), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 20:59:16,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 140 transitions. [2024-11-04 20:59:16,842 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 140 transitions. Word has length 132 [2024-11-04 20:59:16,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:16,842 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 140 transitions. [2024-11-04 20:59:16,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:16,843 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 140 transitions. [2024-11-04 20:59:16,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-04 20:59:16,844 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:16,844 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:59:16,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2024-11-04 20:59:17,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:17,045 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:17,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:17,045 INFO L85 PathProgramCache]: Analyzing trace with hash 197194347, now seen corresponding path program 1 times [2024-11-04 20:59:17,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:17,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788626498] [2024-11-04 20:59:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:17,046 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:17,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:17,047 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:17,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2024-11-04 20:59:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:18,844 INFO L255 TraceCheckSpWp]: Trace formula consists of 1564 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 20:59:18,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-11-04 20:59:18,860 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:18,907 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-11-04 20:59:18,907 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:18,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788626498] [2024-11-04 20:59:18,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [788626498] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:59:18,907 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:59:18,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 20:59:18,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508203118] [2024-11-04 20:59:18,908 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:59:18,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 20:59:18,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:18,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 20:59:18,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:18,909 INFO L87 Difference]: Start difference. First operand 113 states and 140 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:18,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:18,956 INFO L93 Difference]: Finished difference Result 189 states and 237 transitions. [2024-11-04 20:59:18,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 20:59:18,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 136 [2024-11-04 20:59:18,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:18,959 INFO L225 Difference]: With dead ends: 189 [2024-11-04 20:59:18,959 INFO L226 Difference]: Without dead ends: 116 [2024-11-04 20:59:18,960 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:18,961 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:18,962 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 20:59:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-04 20:59:18,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2024-11-04 20:59:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 104 states have internal predecessors, (123), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 20:59:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 143 transitions. [2024-11-04 20:59:18,974 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 143 transitions. Word has length 136 [2024-11-04 20:59:18,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:18,975 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 143 transitions. [2024-11-04 20:59:18,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 143 transitions. [2024-11-04 20:59:18,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-04 20:59:18,976 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:18,977 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:59:19,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2024-11-04 20:59:19,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:19,177 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:19,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:19,178 INFO L85 PathProgramCache]: Analyzing trace with hash -275664921, now seen corresponding path program 1 times [2024-11-04 20:59:19,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:19,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958463737] [2024-11-04 20:59:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:19,178 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:19,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:19,180 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:19,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2024-11-04 20:59:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:21,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 1576 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 20:59:21,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2024-11-04 20:59:21,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-11-04 20:59:21,135 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:21,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958463737] [2024-11-04 20:59:21,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [958463737] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:59:21,135 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:59:21,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 20:59:21,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484701838] [2024-11-04 20:59:21,135 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:59:21,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 20:59:21,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:21,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 20:59:21,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:21,137 INFO L87 Difference]: Start difference. First operand 116 states and 143 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:21,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:21,179 INFO L93 Difference]: Finished difference Result 195 states and 243 transitions. [2024-11-04 20:59:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 20:59:21,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 140 [2024-11-04 20:59:21,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:21,183 INFO L225 Difference]: With dead ends: 195 [2024-11-04 20:59:21,183 INFO L226 Difference]: Without dead ends: 119 [2024-11-04 20:59:21,183 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:21,184 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:21,184 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 20:59:21,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-04 20:59:21,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2024-11-04 20:59:21,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 20:59:21,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 146 transitions. [2024-11-04 20:59:21,193 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 146 transitions. Word has length 140 [2024-11-04 20:59:21,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:21,194 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 146 transitions. [2024-11-04 20:59:21,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:21,194 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 146 transitions. [2024-11-04 20:59:21,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-04 20:59:21,195 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:21,196 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:59:21,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2024-11-04 20:59:21,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:21,396 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:21,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:21,397 INFO L85 PathProgramCache]: Analyzing trace with hash -2131001629, now seen corresponding path program 1 times [2024-11-04 20:59:21,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:21,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324092147] [2024-11-04 20:59:21,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:21,397 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:21,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:21,399 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:21,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2024-11-04 20:59:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:23,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 20:59:23,358 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-04 20:59:23,370 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2024-11-04 20:59:23,418 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:23,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324092147] [2024-11-04 20:59:23,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1324092147] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:59:23,418 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:59:23,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 20:59:23,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659107871] [2024-11-04 20:59:23,418 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:59:23,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 20:59:23,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:23,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 20:59:23,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:23,420 INFO L87 Difference]: Start difference. First operand 119 states and 146 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:23,483 INFO L93 Difference]: Finished difference Result 201 states and 249 transitions. [2024-11-04 20:59:23,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 20:59:23,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 144 [2024-11-04 20:59:23,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:23,489 INFO L225 Difference]: With dead ends: 201 [2024-11-04 20:59:23,489 INFO L226 Difference]: Without dead ends: 122 [2024-11-04 20:59:23,489 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:23,490 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:23,490 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 20:59:23,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-04 20:59:23,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2024-11-04 20:59:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 110 states have internal predecessors, (129), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 20:59:23,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 149 transitions. [2024-11-04 20:59:23,499 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 149 transitions. Word has length 144 [2024-11-04 20:59:23,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:23,500 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 149 transitions. [2024-11-04 20:59:23,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:23,500 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 149 transitions. [2024-11-04 20:59:23,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-04 20:59:23,501 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:23,501 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:59:23,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2024-11-04 20:59:23,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:23,702 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:23,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:23,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1717534559, now seen corresponding path program 1 times [2024-11-04 20:59:23,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:23,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711847026] [2024-11-04 20:59:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:23,703 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:23,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:23,705 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:23,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2024-11-04 20:59:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:25,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-04 20:59:25,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-04 20:59:25,923 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:25,991 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2024-11-04 20:59:25,992 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:25,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711847026] [2024-11-04 20:59:25,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1711847026] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 20:59:25,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 20:59:25,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-04 20:59:25,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061346417] [2024-11-04 20:59:25,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 20:59:25,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 20:59:25,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:25,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 20:59:25,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 20:59:25,994 INFO L87 Difference]: Start difference. First operand 122 states and 149 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:26,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:26,146 INFO L93 Difference]: Finished difference Result 208 states and 256 transitions. [2024-11-04 20:59:26,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 20:59:26,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 148 [2024-11-04 20:59:26,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:26,152 INFO L225 Difference]: With dead ends: 208 [2024-11-04 20:59:26,152 INFO L226 Difference]: Without dead ends: 126 [2024-11-04 20:59:26,152 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 20:59:26,153 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:26,153 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 459 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 20:59:26,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-04 20:59:26,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-11-04 20:59:26,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 114 states have internal predecessors, (133), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 20:59:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 153 transitions. [2024-11-04 20:59:26,162 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 153 transitions. Word has length 148 [2024-11-04 20:59:26,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:26,162 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 153 transitions. [2024-11-04 20:59:26,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:26,163 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 153 transitions. [2024-11-04 20:59:26,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-04 20:59:26,164 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:26,164 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:59:26,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2024-11-04 20:59:26,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:26,365 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:26,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:26,365 INFO L85 PathProgramCache]: Analyzing trace with hash 9888219, now seen corresponding path program 2 times [2024-11-04 20:59:26,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:26,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679154181] [2024-11-04 20:59:26,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:26,366 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:26,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:26,368 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:26,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2024-11-04 20:59:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:28,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 20:59:28,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-11-04 20:59:28,487 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-04 20:59:28,531 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:28,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679154181] [2024-11-04 20:59:28,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [679154181] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:59:28,532 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:59:28,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 20:59:28,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843379831] [2024-11-04 20:59:28,532 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:59:28,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 20:59:28,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:28,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 20:59:28,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:28,533 INFO L87 Difference]: Start difference. First operand 126 states and 153 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:28,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:28,572 INFO L93 Difference]: Finished difference Result 215 states and 263 transitions. [2024-11-04 20:59:28,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 20:59:28,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 152 [2024-11-04 20:59:28,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:28,576 INFO L225 Difference]: With dead ends: 215 [2024-11-04 20:59:28,576 INFO L226 Difference]: Without dead ends: 129 [2024-11-04 20:59:28,576 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:28,577 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:28,577 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 20:59:28,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-04 20:59:28,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2024-11-04 20:59:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 117 states have (on average 1.1623931623931625) internal successors, (136), 117 states have internal predecessors, (136), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 20:59:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2024-11-04 20:59:28,589 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 152 [2024-11-04 20:59:28,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:28,590 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2024-11-04 20:59:28,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2024-11-04 20:59:28,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-04 20:59:28,592 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:28,592 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:59:28,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2024-11-04 20:59:28,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:28,793 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:28,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:28,793 INFO L85 PathProgramCache]: Analyzing trace with hash 454071767, now seen corresponding path program 1 times [2024-11-04 20:59:28,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:28,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218245207] [2024-11-04 20:59:28,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:28,793 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:28,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:28,795 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:28,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2024-11-04 20:59:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:30,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 1624 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-04 20:59:30,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-11-04 20:59:31,002 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-04 20:59:31,066 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:31,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218245207] [2024-11-04 20:59:31,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1218245207] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 20:59:31,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 20:59:31,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-04 20:59:31,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693682427] [2024-11-04 20:59:31,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 20:59:31,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 20:59:31,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:31,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 20:59:31,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 20:59:31,068 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:31,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:31,183 INFO L93 Difference]: Finished difference Result 222 states and 270 transitions. [2024-11-04 20:59:31,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 20:59:31,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 156 [2024-11-04 20:59:31,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:31,189 INFO L225 Difference]: With dead ends: 222 [2024-11-04 20:59:31,189 INFO L226 Difference]: Without dead ends: 133 [2024-11-04 20:59:31,190 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 20:59:31,190 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:31,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 368 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 20:59:31,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-04 20:59:31,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2024-11-04 20:59:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 121 states have (on average 1.1570247933884297) internal successors, (140), 121 states have internal predecessors, (140), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 20:59:31,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 160 transitions. [2024-11-04 20:59:31,206 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 160 transitions. Word has length 156 [2024-11-04 20:59:31,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:31,207 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 160 transitions. [2024-11-04 20:59:31,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:31,207 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 160 transitions. [2024-11-04 20:59:31,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-04 20:59:31,209 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:31,209 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:59:31,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2024-11-04 20:59:31,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:31,410 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:31,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:31,411 INFO L85 PathProgramCache]: Analyzing trace with hash 962063315, now seen corresponding path program 2 times [2024-11-04 20:59:31,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:31,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632389094] [2024-11-04 20:59:31,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:31,411 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:31,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:31,414 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:31,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2024-11-04 20:59:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:33,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 1636 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 20:59:33,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-04 20:59:33,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-04 20:59:33,852 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:33,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632389094] [2024-11-04 20:59:33,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [632389094] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:59:33,853 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:59:33,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 20:59:33,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356295826] [2024-11-04 20:59:33,854 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:59:33,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 20:59:33,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:33,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 20:59:33,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:33,855 INFO L87 Difference]: Start difference. First operand 133 states and 160 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:33,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:33,907 INFO L93 Difference]: Finished difference Result 229 states and 277 transitions. [2024-11-04 20:59:33,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 20:59:33,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 160 [2024-11-04 20:59:33,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:33,910 INFO L225 Difference]: With dead ends: 229 [2024-11-04 20:59:33,910 INFO L226 Difference]: Without dead ends: 136 [2024-11-04 20:59:33,911 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:33,911 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:33,912 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 20:59:33,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-04 20:59:33,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2024-11-04 20:59:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 124 states have (on average 1.153225806451613) internal successors, (143), 124 states have internal predecessors, (143), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 20:59:33,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 163 transitions. [2024-11-04 20:59:33,925 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 163 transitions. Word has length 160 [2024-11-04 20:59:33,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:33,925 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 163 transitions. [2024-11-04 20:59:33,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:33,926 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 163 transitions. [2024-11-04 20:59:33,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-11-04 20:59:33,927 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:33,927 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:59:33,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2024-11-04 20:59:34,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:34,128 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:34,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:34,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1846430897, now seen corresponding path program 1 times [2024-11-04 20:59:34,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:34,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500139947] [2024-11-04 20:59:34,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:34,129 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:34,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:34,130 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:34,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2024-11-04 20:59:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:36,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 1648 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-04 20:59:36,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-04 20:59:36,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-04 20:59:36,642 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:36,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500139947] [2024-11-04 20:59:36,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [500139947] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 20:59:36,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 20:59:36,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-04 20:59:36,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628047983] [2024-11-04 20:59:36,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 20:59:36,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 20:59:36,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:36,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 20:59:36,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 20:59:36,644 INFO L87 Difference]: Start difference. First operand 136 states and 163 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:36,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:36,725 INFO L93 Difference]: Finished difference Result 236 states and 284 transitions. [2024-11-04 20:59:36,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 20:59:36,728 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 164 [2024-11-04 20:59:36,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:36,729 INFO L225 Difference]: With dead ends: 236 [2024-11-04 20:59:36,730 INFO L226 Difference]: Without dead ends: 140 [2024-11-04 20:59:36,730 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 20:59:36,731 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:36,731 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 368 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 20:59:36,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-04 20:59:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2024-11-04 20:59:36,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 128 states have (on average 1.1484375) internal successors, (147), 128 states have internal predecessors, (147), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 20:59:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 167 transitions. [2024-11-04 20:59:36,741 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 167 transitions. Word has length 164 [2024-11-04 20:59:36,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:36,742 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 167 transitions. [2024-11-04 20:59:36,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:36,742 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 167 transitions. [2024-11-04 20:59:36,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2024-11-04 20:59:36,743 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:36,744 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:59:36,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2024-11-04 20:59:36,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:36,944 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:36,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:36,945 INFO L85 PathProgramCache]: Analyzing trace with hash -249340725, now seen corresponding path program 2 times [2024-11-04 20:59:36,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:36,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238656821] [2024-11-04 20:59:36,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:36,945 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:36,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:36,948 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:36,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2024-11-04 20:59:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:39,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 1660 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 20:59:39,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-04 20:59:39,481 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2024-11-04 20:59:39,512 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:39,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238656821] [2024-11-04 20:59:39,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1238656821] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:59:39,513 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:59:39,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 20:59:39,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126585803] [2024-11-04 20:59:39,513 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:59:39,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 20:59:39,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:39,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 20:59:39,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:39,514 INFO L87 Difference]: Start difference. First operand 140 states and 167 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:39,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:39,552 INFO L93 Difference]: Finished difference Result 243 states and 291 transitions. [2024-11-04 20:59:39,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 20:59:39,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 168 [2024-11-04 20:59:39,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:39,557 INFO L225 Difference]: With dead ends: 243 [2024-11-04 20:59:39,557 INFO L226 Difference]: Without dead ends: 143 [2024-11-04 20:59:39,557 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:39,558 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:39,558 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 20:59:39,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-04 20:59:39,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2024-11-04 20:59:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 131 states have (on average 1.1450381679389312) internal successors, (150), 131 states have internal predecessors, (150), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 20:59:39,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 170 transitions. [2024-11-04 20:59:39,571 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 170 transitions. Word has length 168 [2024-11-04 20:59:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:39,573 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 170 transitions. [2024-11-04 20:59:39,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:39,573 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 170 transitions. [2024-11-04 20:59:39,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-11-04 20:59:39,574 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:39,575 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:59:39,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2024-11-04 20:59:39,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:39,775 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:39,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:39,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1686083527, now seen corresponding path program 1 times [2024-11-04 20:59:39,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:39,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324043547] [2024-11-04 20:59:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:39,776 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:39,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:39,778 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:39,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2024-11-04 20:59:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:42,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 1672 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-04 20:59:42,433 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-04 20:59:42,453 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2024-11-04 20:59:42,514 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:42,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324043547] [2024-11-04 20:59:42,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [324043547] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 20:59:42,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 20:59:42,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-04 20:59:42,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370094820] [2024-11-04 20:59:42,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 20:59:42,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 20:59:42,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:42,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 20:59:42,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 20:59:42,516 INFO L87 Difference]: Start difference. First operand 143 states and 170 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:42,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:42,597 INFO L93 Difference]: Finished difference Result 250 states and 298 transitions. [2024-11-04 20:59:42,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 20:59:42,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 172 [2024-11-04 20:59:42,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:42,601 INFO L225 Difference]: With dead ends: 250 [2024-11-04 20:59:42,601 INFO L226 Difference]: Without dead ends: 147 [2024-11-04 20:59:42,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 20:59:42,602 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:42,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 368 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 20:59:42,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-04 20:59:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-11-04 20:59:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 135 states have internal predecessors, (154), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 20:59:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2024-11-04 20:59:42,613 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 172 [2024-11-04 20:59:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:42,613 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2024-11-04 20:59:42,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:42,613 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2024-11-04 20:59:42,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2024-11-04 20:59:42,614 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:42,615 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:59:42,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2024-11-04 20:59:42,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:42,815 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:42,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:42,816 INFO L85 PathProgramCache]: Analyzing trace with hash 151909571, now seen corresponding path program 2 times [2024-11-04 20:59:42,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:42,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637025237] [2024-11-04 20:59:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:42,816 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:42,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:42,817 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:42,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2024-11-04 20:59:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:45,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 20:59:45,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-11-04 20:59:45,451 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-11-04 20:59:45,481 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:45,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637025237] [2024-11-04 20:59:45,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [637025237] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:59:45,481 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:59:45,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 20:59:45,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962817842] [2024-11-04 20:59:45,482 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:59:45,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 20:59:45,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:45,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 20:59:45,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:45,483 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:45,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:45,519 INFO L93 Difference]: Finished difference Result 257 states and 305 transitions. [2024-11-04 20:59:45,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 20:59:45,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 176 [2024-11-04 20:59:45,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:45,522 INFO L225 Difference]: With dead ends: 257 [2024-11-04 20:59:45,522 INFO L226 Difference]: Without dead ends: 150 [2024-11-04 20:59:45,523 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:45,523 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:45,523 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 20:59:45,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-04 20:59:45,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-11-04 20:59:45,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 20:59:45,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 177 transitions. [2024-11-04 20:59:45,538 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 177 transitions. Word has length 176 [2024-11-04 20:59:45,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:45,539 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 177 transitions. [2024-11-04 20:59:45,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:45,539 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 177 transitions. [2024-11-04 20:59:45,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2024-11-04 20:59:45,540 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:45,540 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:59:45,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2024-11-04 20:59:45,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:45,741 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:45,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:45,741 INFO L85 PathProgramCache]: Analyzing trace with hash -848886977, now seen corresponding path program 1 times [2024-11-04 20:59:45,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:45,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075359605] [2024-11-04 20:59:45,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:45,742 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:45,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:45,744 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:45,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2024-11-04 20:59:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:48,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 1696 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-04 20:59:48,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-11-04 20:59:48,545 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-11-04 20:59:48,592 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:48,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075359605] [2024-11-04 20:59:48,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1075359605] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 20:59:48,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 20:59:48,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-04 20:59:48,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161216243] [2024-11-04 20:59:48,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 20:59:48,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 20:59:48,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:48,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 20:59:48,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 20:59:48,594 INFO L87 Difference]: Start difference. First operand 150 states and 177 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:48,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:48,662 INFO L93 Difference]: Finished difference Result 264 states and 312 transitions. [2024-11-04 20:59:48,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 20:59:48,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 180 [2024-11-04 20:59:48,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:48,667 INFO L225 Difference]: With dead ends: 264 [2024-11-04 20:59:48,667 INFO L226 Difference]: Without dead ends: 154 [2024-11-04 20:59:48,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 20:59:48,668 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:48,668 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 368 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 20:59:48,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-04 20:59:48,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2024-11-04 20:59:48,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 142 states have internal predecessors, (161), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 20:59:48,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 181 transitions. [2024-11-04 20:59:48,680 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 181 transitions. Word has length 180 [2024-11-04 20:59:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:48,680 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 181 transitions. [2024-11-04 20:59:48,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:48,680 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 181 transitions. [2024-11-04 20:59:48,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-11-04 20:59:48,681 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:48,682 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:59:48,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2024-11-04 20:59:48,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:48,882 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:48,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:48,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1990429765, now seen corresponding path program 2 times [2024-11-04 20:59:48,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:48,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138092273] [2024-11-04 20:59:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:48,883 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:48,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:48,886 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:48,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2024-11-04 20:59:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:51,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 1708 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 20:59:51,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2024-11-04 20:59:51,800 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2024-11-04 20:59:51,839 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:51,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138092273] [2024-11-04 20:59:51,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1138092273] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:59:51,839 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:59:51,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 20:59:51,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976761350] [2024-11-04 20:59:51,840 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:59:51,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 20:59:51,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:51,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 20:59:51,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:51,841 INFO L87 Difference]: Start difference. First operand 154 states and 181 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:51,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:51,875 INFO L93 Difference]: Finished difference Result 271 states and 319 transitions. [2024-11-04 20:59:51,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 20:59:51,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 184 [2024-11-04 20:59:51,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:51,879 INFO L225 Difference]: With dead ends: 271 [2024-11-04 20:59:51,879 INFO L226 Difference]: Without dead ends: 157 [2024-11-04 20:59:51,879 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:51,880 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:51,880 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 20:59:51,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-04 20:59:51,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2024-11-04 20:59:51,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 145 states have (on average 1.1310344827586207) internal successors, (164), 145 states have internal predecessors, (164), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 20:59:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 184 transitions. [2024-11-04 20:59:51,892 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 184 transitions. Word has length 184 [2024-11-04 20:59:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:51,892 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 184 transitions. [2024-11-04 20:59:51,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:51,892 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 184 transitions. [2024-11-04 20:59:51,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2024-11-04 20:59:51,893 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:51,893 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:59:51,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2024-11-04 20:59:52,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:52,094 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:52,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:52,094 INFO L85 PathProgramCache]: Analyzing trace with hash 881112503, now seen corresponding path program 1 times [2024-11-04 20:59:52,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:52,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037035067] [2024-11-04 20:59:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:52,095 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:52,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:52,096 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:52,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2024-11-04 20:59:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:55,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 1720 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-04 20:59:55,033 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2024-11-04 20:59:55,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2024-11-04 20:59:55,122 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:55,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037035067] [2024-11-04 20:59:55,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2037035067] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 20:59:55,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 20:59:55,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-04 20:59:55,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949583641] [2024-11-04 20:59:55,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 20:59:55,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 20:59:55,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:55,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 20:59:55,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 20:59:55,125 INFO L87 Difference]: Start difference. First operand 157 states and 184 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:55,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:55,201 INFO L93 Difference]: Finished difference Result 278 states and 326 transitions. [2024-11-04 20:59:55,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 20:59:55,203 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 188 [2024-11-04 20:59:55,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:55,204 INFO L225 Difference]: With dead ends: 278 [2024-11-04 20:59:55,204 INFO L226 Difference]: Without dead ends: 161 [2024-11-04 20:59:55,205 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 20:59:55,205 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:55,206 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 368 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 20:59:55,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-04 20:59:55,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2024-11-04 20:59:55,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 149 states have (on average 1.1275167785234899) internal successors, (168), 149 states have internal predecessors, (168), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 20:59:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 188 transitions. [2024-11-04 20:59:55,216 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 188 transitions. Word has length 188 [2024-11-04 20:59:55,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:55,217 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 188 transitions. [2024-11-04 20:59:55,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:55,217 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 188 transitions. [2024-11-04 20:59:55,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-11-04 20:59:55,218 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:55,218 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:59:55,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2024-11-04 20:59:55,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:55,419 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:55,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:55,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1383884365, now seen corresponding path program 2 times [2024-11-04 20:59:55,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:55,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077170258] [2024-11-04 20:59:55,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:55,420 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:55,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:55,421 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:55,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2024-11-04 20:59:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:59:58,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 1732 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 20:59:58,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:59:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-11-04 20:59:58,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:59:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2024-11-04 20:59:58,490 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:59:58,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077170258] [2024-11-04 20:59:58,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1077170258] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:59:58,490 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:59:58,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 20:59:58,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85248079] [2024-11-04 20:59:58,490 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:59:58,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 20:59:58,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:59:58,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 20:59:58,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:58,492 INFO L87 Difference]: Start difference. First operand 161 states and 188 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:58,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:59:58,531 INFO L93 Difference]: Finished difference Result 285 states and 333 transitions. [2024-11-04 20:59:58,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 20:59:58,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 192 [2024-11-04 20:59:58,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:59:58,534 INFO L225 Difference]: With dead ends: 285 [2024-11-04 20:59:58,534 INFO L226 Difference]: Without dead ends: 164 [2024-11-04 20:59:58,534 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 20:59:58,535 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 20:59:58,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 20:59:58,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-04 20:59:58,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2024-11-04 20:59:58,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 152 states have (on average 1.125) internal successors, (171), 152 states have internal predecessors, (171), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 20:59:58,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 191 transitions. [2024-11-04 20:59:58,546 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 191 transitions. Word has length 192 [2024-11-04 20:59:58,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:59:58,547 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 191 transitions. [2024-11-04 20:59:58,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 20:59:58,547 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 191 transitions. [2024-11-04 20:59:58,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2024-11-04 20:59:58,548 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:59:58,548 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:59:58,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2024-11-04 20:59:58,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:58,749 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:59:58,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:59:58,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1159368913, now seen corresponding path program 1 times [2024-11-04 20:59:58,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:59:58,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995091209] [2024-11-04 20:59:58,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:59:58,749 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:59:58,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:59:58,751 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:59:58,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2024-11-04 21:00:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 21:00:01,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 1744 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-04 21:00:01,828 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 21:00:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-11-04 21:00:01,845 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 21:00:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2024-11-04 21:00:01,899 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 21:00:01,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995091209] [2024-11-04 21:00:01,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [995091209] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 21:00:01,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 21:00:01,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-04 21:00:01,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563289281] [2024-11-04 21:00:01,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 21:00:01,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 21:00:01,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 21:00:01,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 21:00:01,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 21:00:01,901 INFO L87 Difference]: Start difference. First operand 164 states and 191 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 21:00:01,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 21:00:01,986 INFO L93 Difference]: Finished difference Result 292 states and 340 transitions. [2024-11-04 21:00:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 21:00:01,988 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 196 [2024-11-04 21:00:01,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 21:00:01,990 INFO L225 Difference]: With dead ends: 292 [2024-11-04 21:00:01,990 INFO L226 Difference]: Without dead ends: 168 [2024-11-04 21:00:01,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 21:00:01,992 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 21:00:01,992 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 368 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 21:00:01,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-04 21:00:02,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2024-11-04 21:00:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 156 states have (on average 1.1217948717948718) internal successors, (175), 156 states have internal predecessors, (175), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 21:00:02,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 195 transitions. [2024-11-04 21:00:02,003 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 195 transitions. Word has length 196 [2024-11-04 21:00:02,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 21:00:02,004 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 195 transitions. [2024-11-04 21:00:02,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 21:00:02,004 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 195 transitions. [2024-11-04 21:00:02,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-11-04 21:00:02,005 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 21:00:02,005 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 21:00:02,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2024-11-04 21:00:02,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 21:00:02,206 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 21:00:02,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 21:00:02,206 INFO L85 PathProgramCache]: Analyzing trace with hash -265804117, now seen corresponding path program 2 times [2024-11-04 21:00:02,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 21:00:02,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75552653] [2024-11-04 21:00:02,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 21:00:02,207 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 21:00:02,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 21:00:02,208 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 21:00:02,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2024-11-04 21:00:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 21:00:05,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 1756 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 21:00:05,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 21:00:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2024-11-04 21:00:05,434 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 21:00:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2024-11-04 21:00:05,464 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 21:00:05,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75552653] [2024-11-04 21:00:05,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [75552653] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 21:00:05,464 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 21:00:05,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 21:00:05,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776362026] [2024-11-04 21:00:05,464 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 21:00:05,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 21:00:05,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 21:00:05,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 21:00:05,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 21:00:05,465 INFO L87 Difference]: Start difference. First operand 168 states and 195 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 21:00:05,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 21:00:05,492 INFO L93 Difference]: Finished difference Result 299 states and 347 transitions. [2024-11-04 21:00:05,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 21:00:05,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 200 [2024-11-04 21:00:05,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 21:00:05,494 INFO L225 Difference]: With dead ends: 299 [2024-11-04 21:00:05,495 INFO L226 Difference]: Without dead ends: 171 [2024-11-04 21:00:05,495 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 21:00:05,496 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 21:00:05,496 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 21:00:05,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-04 21:00:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2024-11-04 21:00:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 159 states have (on average 1.119496855345912) internal successors, (178), 159 states have internal predecessors, (178), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 21:00:05,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 198 transitions. [2024-11-04 21:00:05,509 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 198 transitions. Word has length 200 [2024-11-04 21:00:05,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 21:00:05,509 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 198 transitions. [2024-11-04 21:00:05,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 21:00:05,509 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 198 transitions. [2024-11-04 21:00:05,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2024-11-04 21:00:05,510 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 21:00:05,511 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 21:00:05,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2024-11-04 21:00:05,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 21:00:05,711 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 21:00:05,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 21:00:05,712 INFO L85 PathProgramCache]: Analyzing trace with hash -960106585, now seen corresponding path program 1 times [2024-11-04 21:00:05,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 21:00:05,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738993307] [2024-11-04 21:00:05,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 21:00:05,712 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 21:00:05,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 21:00:05,714 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 21:00:05,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2024-11-04 21:00:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 21:00:08,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 1768 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 21:00:08,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 21:00:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-04 21:00:08,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 21:00:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2024-11-04 21:00:09,026 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 21:00:09,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738993307] [2024-11-04 21:00:09,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [738993307] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 21:00:09,026 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 21:00:09,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 21:00:09,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813958070] [2024-11-04 21:00:09,027 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 21:00:09,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 21:00:09,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 21:00:09,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 21:00:09,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 21:00:09,028 INFO L87 Difference]: Start difference. First operand 171 states and 198 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 21:00:09,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 21:00:09,060 INFO L93 Difference]: Finished difference Result 305 states and 353 transitions. [2024-11-04 21:00:09,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 21:00:09,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 204 [2024-11-04 21:00:09,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 21:00:09,063 INFO L225 Difference]: With dead ends: 305 [2024-11-04 21:00:09,063 INFO L226 Difference]: Without dead ends: 174 [2024-11-04 21:00:09,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 21:00:09,064 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 21:00:09,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 21:00:09,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-04 21:00:09,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2024-11-04 21:00:09,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 162 states have (on average 1.117283950617284) internal successors, (181), 162 states have internal predecessors, (181), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 21:00:09,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 201 transitions. [2024-11-04 21:00:09,108 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 201 transitions. Word has length 204 [2024-11-04 21:00:09,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 21:00:09,109 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 201 transitions. [2024-11-04 21:00:09,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 21:00:09,109 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 201 transitions. [2024-11-04 21:00:09,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2024-11-04 21:00:09,113 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 21:00:09,113 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 21:00:09,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2024-11-04 21:00:09,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 21:00:09,314 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 21:00:09,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 21:00:09,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1004530211, now seen corresponding path program 1 times [2024-11-04 21:00:09,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 21:00:09,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784565375] [2024-11-04 21:00:09,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 21:00:09,316 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 21:00:09,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 21:00:09,317 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 21:00:09,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2024-11-04 21:00:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 21:00:12,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-04 21:00:12,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 21:00:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-04 21:00:12,652 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 21:00:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2024-11-04 21:00:12,698 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 21:00:12,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784565375] [2024-11-04 21:00:12,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1784565375] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 21:00:12,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 21:00:12,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-04 21:00:12,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308887278] [2024-11-04 21:00:12,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 21:00:12,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 21:00:12,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 21:00:12,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 21:00:12,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 21:00:12,699 INFO L87 Difference]: Start difference. First operand 174 states and 201 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 21:00:12,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 21:00:12,757 INFO L93 Difference]: Finished difference Result 312 states and 360 transitions. [2024-11-04 21:00:12,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 21:00:12,758 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 208 [2024-11-04 21:00:12,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 21:00:12,759 INFO L225 Difference]: With dead ends: 312 [2024-11-04 21:00:12,760 INFO L226 Difference]: Without dead ends: 178 [2024-11-04 21:00:12,760 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 21:00:12,761 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 21:00:12,761 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 459 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 21:00:12,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-04 21:00:12,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2024-11-04 21:00:12,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 166 states have (on average 1.1144578313253013) internal successors, (185), 166 states have internal predecessors, (185), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 21:00:12,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 205 transitions. [2024-11-04 21:00:12,779 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 205 transitions. Word has length 208 [2024-11-04 21:00:12,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 21:00:12,779 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 205 transitions. [2024-11-04 21:00:12,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 21:00:12,779 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 205 transitions. [2024-11-04 21:00:12,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2024-11-04 21:00:12,780 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 21:00:12,781 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 21:00:12,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2024-11-04 21:00:12,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 21:00:12,981 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 21:00:12,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 21:00:12,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1178617503, now seen corresponding path program 2 times [2024-11-04 21:00:12,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 21:00:12,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366768026] [2024-11-04 21:00:12,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 21:00:12,982 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 21:00:12,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 21:00:12,985 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 21:00:12,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2024-11-04 21:00:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 21:00:16,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 1792 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 21:00:16,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 21:00:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-04 21:00:16,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 21:00:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2024-11-04 21:00:16,525 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 21:00:16,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366768026] [2024-11-04 21:00:16,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1366768026] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 21:00:16,525 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 21:00:16,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 21:00:16,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524890008] [2024-11-04 21:00:16,525 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 21:00:16,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 21:00:16,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 21:00:16,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 21:00:16,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 21:00:16,527 INFO L87 Difference]: Start difference. First operand 178 states and 205 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 21:00:16,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 21:00:16,560 INFO L93 Difference]: Finished difference Result 319 states and 367 transitions. [2024-11-04 21:00:16,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 21:00:16,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 212 [2024-11-04 21:00:16,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 21:00:16,563 INFO L225 Difference]: With dead ends: 319 [2024-11-04 21:00:16,563 INFO L226 Difference]: Without dead ends: 181 [2024-11-04 21:00:16,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 21:00:16,564 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 21:00:16,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 21:00:16,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-04 21:00:16,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2024-11-04 21:00:16,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 169 states have (on average 1.1124260355029585) internal successors, (188), 169 states have internal predecessors, (188), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 21:00:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 208 transitions. [2024-11-04 21:00:16,578 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 208 transitions. Word has length 212 [2024-11-04 21:00:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 21:00:16,578 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 208 transitions. [2024-11-04 21:00:16,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 21:00:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 208 transitions. [2024-11-04 21:00:16,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2024-11-04 21:00:16,579 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 21:00:16,580 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 21:00:16,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2024-11-04 21:00:16,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 21:00:16,781 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 21:00:16,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 21:00:16,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1868237669, now seen corresponding path program 1 times [2024-11-04 21:00:16,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 21:00:16,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200217196] [2024-11-04 21:00:16,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 21:00:16,782 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 21:00:16,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 21:00:16,783 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 21:00:16,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2024-11-04 21:00:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 21:00:20,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-04 21:00:20,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 21:00:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-04 21:00:20,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 21:00:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2024-11-04 21:00:20,395 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 21:00:20,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200217196] [2024-11-04 21:00:20,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1200217196] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 21:00:20,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 21:00:20,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-04 21:00:20,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429800214] [2024-11-04 21:00:20,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 21:00:20,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 21:00:20,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 21:00:20,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 21:00:20,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 21:00:20,396 INFO L87 Difference]: Start difference. First operand 181 states and 208 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 21:00:20,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 21:00:20,457 INFO L93 Difference]: Finished difference Result 326 states and 374 transitions. [2024-11-04 21:00:20,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 21:00:20,458 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 216 [2024-11-04 21:00:20,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 21:00:20,459 INFO L225 Difference]: With dead ends: 326 [2024-11-04 21:00:20,459 INFO L226 Difference]: Without dead ends: 185 [2024-11-04 21:00:20,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-04 21:00:20,460 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 21:00:20,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 368 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 21:00:20,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-04 21:00:20,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2024-11-04 21:00:20,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 173 states have (on average 1.1098265895953756) internal successors, (192), 173 states have internal predecessors, (192), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 21:00:20,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 212 transitions. [2024-11-04 21:00:20,474 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 212 transitions. Word has length 216 [2024-11-04 21:00:20,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 21:00:20,475 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 212 transitions. [2024-11-04 21:00:20,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-04 21:00:20,475 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 212 transitions. [2024-11-04 21:00:20,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2024-11-04 21:00:20,477 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 21:00:20,477 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 21:00:20,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2024-11-04 21:00:20,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 21:00:20,678 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 21:00:20,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 21:00:20,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1664465769, now seen corresponding path program 2 times [2024-11-04 21:00:20,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 21:00:20,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689122770] [2024-11-04 21:00:20,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 21:00:20,679 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 21:00:20,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 21:00:20,680 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 21:00:20,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2024-11-04 21:00:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 21:00:24,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 1816 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-04 21:00:24,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 21:00:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-11-04 21:00:25,818 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 21:00:28,834 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-11-04 21:00:28,834 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 21:00:28,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689122770] [2024-11-04 21:00:28,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [689122770] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 21:00:28,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 21:00:28,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2024-11-04 21:00:28,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678138721] [2024-11-04 21:00:28,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 21:00:28,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-04 21:00:28,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 21:00:28,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-04 21:00:28,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2024-11-04 21:00:28,837 INFO L87 Difference]: Start difference. First operand 185 states and 212 transitions. Second operand has 19 states, 17 states have (on average 10.941176470588236) internal successors, (186), 19 states have internal predecessors, (186), 6 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20)