/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.safe_arbitrated_fifos_n2d8w8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-11-01 08:00:35,880 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-01 08:00:35,968 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf [2024-11-01 08:00:35,976 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-01 08:00:35,976 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-01 08:00:36,004 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-01 08:00:36,005 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-01 08:00:36,005 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-01 08:00:36,006 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-01 08:00:36,006 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-01 08:00:36,006 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-01 08:00:36,007 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-01 08:00:36,007 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-01 08:00:36,008 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-01 08:00:36,008 INFO L153 SettingsManager]: * Use SBE=true [2024-11-01 08:00:36,008 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-01 08:00:36,009 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-01 08:00:36,009 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-01 08:00:36,009 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-01 08:00:36,010 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-01 08:00:36,010 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-01 08:00:36,011 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-01 08:00:36,011 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-01 08:00:36,011 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-01 08:00:36,011 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-01 08:00:36,012 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-01 08:00:36,012 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-01 08:00:36,013 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-01 08:00:36,013 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-01 08:00:36,013 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-01 08:00:36,014 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-01 08:00:36,014 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-01 08:00:36,014 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-01 08:00:36,015 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-01 08:00:36,015 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-01 08:00:36,015 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-01 08:00:36,015 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:36,016 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-01 08:00:36,016 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-01 08:00:36,016 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-01 08:00:36,016 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-01 08:00:36,018 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-11-01 08:00:36,018 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:36,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-01 08:00:36,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-01 08:00:36,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-01 08:00:36,358 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-01 08:00:36,358 INFO L274 PluginConnector]: CDTParser initialized [2024-11-01 08:00:36,359 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.safe_arbitrated_fifos_n2d8w8.c [2024-11-01 08:00:37,775 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-01 08:00:38,115 INFO L384 CDTParser]: Found 1 translation units. [2024-11-01 08:00:38,116 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.safe_arbitrated_fifos_n2d8w8.c [2024-11-01 08:00:38,133 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3c7c7afc/48df470ac177418fa9aafde6bc949e83/FLAG24018c9e2 [2024-11-01 08:00:38,151 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3c7c7afc/48df470ac177418fa9aafde6bc949e83 [2024-11-01 08:00:38,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-01 08:00:38,155 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-01 08:00:38,156 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-01 08:00:38,156 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-01 08:00:38,161 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-01 08:00:38,162 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,163 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cf47b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38, skipping insertion in model container [2024-11-01 08:00:38,163 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,227 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-01 08:00:38,411 WARN L251 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.safe_arbitrated_fifos_n2d8w8.c[1268,1281] [2024-11-01 08:00:38,649 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-01 08:00:38,666 INFO L200 MainTranslator]: Completed pre-run [2024-11-01 08:00:38,680 WARN L251 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.safe_arbitrated_fifos_n2d8w8.c[1268,1281] [2024-11-01 08:00:38,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-01 08:00:38,814 INFO L204 MainTranslator]: Completed translation [2024-11-01 08:00:38,816 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38 WrapperNode [2024-11-01 08:00:38,816 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-01 08:00:38,817 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-01 08:00:38,817 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-01 08:00:38,817 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-01 08:00:38,825 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,864 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,929 INFO L138 Inliner]: procedures = 18, calls = 41, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 959 [2024-11-01 08:00:38,930 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-01 08:00:38,931 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-01 08:00:38,931 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-01 08:00:38,931 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-01 08:00:38,942 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,942 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,949 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,984 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 9, 9]. 45 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 8 writes are split as follows [0, 4, 4]. [2024-11-01 08:00:38,984 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:38,984 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:39,011 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:39,015 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:39,020 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:39,026 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:39,036 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-01 08:00:39,037 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-01 08:00:39,037 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-01 08:00:39,038 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-01 08:00:39,038 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (1/1) ... [2024-11-01 08:00:39,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-01 08:00:39,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-01 08:00:39,069 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) [2024-11-01 08:00:39,076 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 [2024-11-01 08:00:39,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-01 08:00:39,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2024-11-01 08:00:39,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2024-11-01 08:00:39,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2024-11-01 08:00:39,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-01 08:00:39,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-01 08:00:39,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-01 08:00:39,098 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-01 08:00:39,098 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-01 08:00:39,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-01 08:00:39,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-01 08:00:39,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-01 08:00:39,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2024-11-01 08:00:39,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#1 [2024-11-01 08:00:39,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#2 [2024-11-01 08:00:39,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-01 08:00:39,315 INFO L238 CfgBuilder]: Building ICFG [2024-11-01 08:00:39,318 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-01 08:00:40,236 INFO L? ?]: Removed 681 outVars from TransFormulas that were not future-live. [2024-11-01 08:00:40,237 INFO L287 CfgBuilder]: Performing block encoding [2024-11-01 08:00:40,249 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-01 08:00:40,249 INFO L316 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-01 08:00:40,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.11 08:00:40 BoogieIcfgContainer [2024-11-01 08:00:40,250 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-01 08:00:40,253 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-01 08:00:40,254 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-01 08:00:40,257 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-01 08:00:40,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.11 08:00:38" (1/3) ... [2024-11-01 08:00:40,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292e050f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.11 08:00:40, skipping insertion in model container [2024-11-01 08:00:40,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:38" (2/3) ... [2024-11-01 08:00:40,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292e050f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.11 08:00:40, skipping insertion in model container [2024-11-01 08:00:40,261 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.11 08:00:40" (3/3) ... [2024-11-01 08:00:40,263 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.safe_arbitrated_fifos_n2d8w8.c [2024-11-01 08:00:40,281 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-01 08:00:40,281 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-01 08:00:40,340 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-01 08:00:40,347 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;@475f8f76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-01 08:00:40,347 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-01 08:00:40,351 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 35 states have internal predecessors, (50), 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) [2024-11-01 08:00:40,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-01 08:00:40,358 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:40,359 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] [2024-11-01 08:00:40,359 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:40,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:40,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1919498836, now seen corresponding path program 1 times [2024-11-01 08:00:40,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:40,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494797235] [2024-11-01 08:00:40,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:40,373 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:40,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:40,376 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) [2024-11-01 08:00:40,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-01 08:00:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:40,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-01 08:00:40,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-01 08:00:41,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-01 08:00:41,048 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:41,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494797235] [2024-11-01 08:00:41,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1494797235] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:41,049 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:41,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-11-01 08:00:41,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917365446] [2024-11-01 08:00:41,053 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:41,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-01 08:00:41,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:41,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-01 08:00:41,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-01 08:00:41,086 INFO L87 Difference]: Start difference. First operand has 42 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 35 states have internal predecessors, (50), 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 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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) [2024-11-01 08:00:41,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:41,107 INFO L93 Difference]: Finished difference Result 77 states and 117 transitions. [2024-11-01 08:00:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-01 08:00:41,109 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 39 [2024-11-01 08:00:41,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:41,115 INFO L225 Difference]: With dead ends: 77 [2024-11-01 08:00:41,115 INFO L226 Difference]: Without dead ends: 39 [2024-11-01 08:00:41,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-01 08:00:41,121 INFO L432 NwaCegarLoop]: 49 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, 49 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 [2024-11-01 08:00:41,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:41,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-01 08:00:41,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-01 08:00:41,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 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) [2024-11-01 08:00:41,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2024-11-01 08:00:41,161 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 39 [2024-11-01 08:00:41,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:41,162 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2024-11-01 08:00:41,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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) [2024-11-01 08:00:41,162 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2024-11-01 08:00:41,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-01 08:00:41,165 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:41,165 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] [2024-11-01 08:00:41,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0 [2024-11-01 08:00:41,366 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 [2024-11-01 08:00:41,367 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:41,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:41,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1633554172, now seen corresponding path program 1 times [2024-11-01 08:00:41,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:41,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432033838] [2024-11-01 08:00:41,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:41,368 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:41,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:41,371 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) [2024-11-01 08:00:41,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-01 08:00:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:41,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:41,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-01 08:00:42,018 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-01 08:00:42,074 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:42,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432033838] [2024-11-01 08:00:42,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1432033838] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:42,074 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:42,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:42,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823180611] [2024-11-01 08:00:42,074 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:42,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:42,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:42,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:42,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:42,080 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2024-11-01 08:00:42,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:42,118 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2024-11-01 08:00:42,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:42,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 39 [2024-11-01 08:00:42,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:42,121 INFO L225 Difference]: With dead ends: 77 [2024-11-01 08:00:42,121 INFO L226 Difference]: Without dead ends: 42 [2024-11-01 08:00:42,123 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:42,124 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 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 [2024-11-01 08:00:42,124 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:42,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-01 08:00:42,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-01 08:00:42,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 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) [2024-11-01 08:00:42,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2024-11-01 08:00:42,135 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 39 [2024-11-01 08:00:42,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:42,135 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2024-11-01 08:00:42,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2024-11-01 08:00:42,135 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2024-11-01 08:00:42,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-01 08:00:42,136 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:42,137 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] [2024-11-01 08:00:42,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0 [2024-11-01 08:00:42,337 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 [2024-11-01 08:00:42,338 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:42,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:42,338 INFO L85 PathProgramCache]: Analyzing trace with hash -682782464, now seen corresponding path program 1 times [2024-11-01 08:00:42,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:42,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473198513] [2024-11-01 08:00:42,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:42,339 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:42,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:42,340 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) [2024-11-01 08:00:42,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-11-01 08:00:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:42,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:00:42,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-01 08:00:42,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-01 08:00:43,025 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:43,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473198513] [2024-11-01 08:00:43,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [473198513] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:00:43,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:00:43,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:00:43,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96226168] [2024-11-01 08:00:43,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:00:43,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:00:43,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:43,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:00:43,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:00:43,027 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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) [2024-11-01 08:00:43,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:43,134 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2024-11-01 08:00:43,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-01 08:00:43,138 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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 43 [2024-11-01 08:00:43,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:43,139 INFO L225 Difference]: With dead ends: 85 [2024-11-01 08:00:43,139 INFO L226 Difference]: Without dead ends: 50 [2024-11-01 08:00:43,139 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-11-01 08:00:43,140 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 5 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:43,141 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 223 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:00:43,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-01 08:00:43,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-01 08:00:43,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 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) [2024-11-01 08:00:43,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-11-01 08:00:43,152 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 43 [2024-11-01 08:00:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:43,152 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-11-01 08:00:43,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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) [2024-11-01 08:00:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-11-01 08:00:43,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-01 08:00:43,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:43,155 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 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] [2024-11-01 08:00:43,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2024-11-01 08:00:43,355 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 [2024-11-01 08:00:43,356 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:43,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:43,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1659549432, now seen corresponding path program 2 times [2024-11-01 08:00:43,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:43,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527739685] [2024-11-01 08:00:43,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:43,357 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:43,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:43,360 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) [2024-11-01 08:00:43,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-11-01 08:00:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:43,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-01 08:00:43,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-01 08:00:43,980 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-01 08:00:44,124 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:44,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527739685] [2024-11-01 08:00:44,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [527739685] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:00:44,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:00:44,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-01 08:00:44,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317872094] [2024-11-01 08:00:44,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:00:44,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-01 08:00:44,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:44,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-01 08:00:44,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-11-01 08:00:44,127 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 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) [2024-11-01 08:00:44,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:44,284 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2024-11-01 08:00:44,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-01 08:00:44,287 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 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 51 [2024-11-01 08:00:44,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:44,287 INFO L225 Difference]: With dead ends: 89 [2024-11-01 08:00:44,288 INFO L226 Difference]: Without dead ends: 54 [2024-11-01 08:00:44,288 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-11-01 08:00:44,289 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:44,289 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 355 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:00:44,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-01 08:00:44,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-01 08:00:44,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 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) [2024-11-01 08:00:44,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2024-11-01 08:00:44,300 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 51 [2024-11-01 08:00:44,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:44,300 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2024-11-01 08:00:44,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 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) [2024-11-01 08:00:44,301 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2024-11-01 08:00:44,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-01 08:00:44,301 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:44,302 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 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] [2024-11-01 08:00:44,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2024-11-01 08:00:44,507 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 [2024-11-01 08:00:44,508 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:44,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:44,508 INFO L85 PathProgramCache]: Analyzing trace with hash 488258804, now seen corresponding path program 3 times [2024-11-01 08:00:44,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:44,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279269218] [2024-11-01 08:00:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:44,509 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:44,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:44,510 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) [2024-11-01 08:00:44,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2024-11-01 08:00:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:45,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:45,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2024-11-01 08:00:45,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2024-11-01 08:00:45,138 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:45,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279269218] [2024-11-01 08:00:45,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1279269218] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:45,138 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:45,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:45,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663612027] [2024-11-01 08:00:45,138 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:45,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:45,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:45,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:45,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:45,140 INFO L87 Difference]: Start difference. First operand 54 states and 64 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) [2024-11-01 08:00:45,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:45,167 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2024-11-01 08:00:45,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:45,168 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 55 [2024-11-01 08:00:45,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:45,169 INFO L225 Difference]: With dead ends: 89 [2024-11-01 08:00:45,169 INFO L226 Difference]: Without dead ends: 57 [2024-11-01 08:00:45,169 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:45,170 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 3 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 90 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 [2024-11-01 08:00:45,170 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 90 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:45,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-01 08:00:45,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-01 08:00:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.14) internal successors, (57), 50 states have internal predecessors, (57), 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) [2024-11-01 08:00:45,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2024-11-01 08:00:45,179 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 55 [2024-11-01 08:00:45,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:45,179 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2024-11-01 08:00:45,179 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) [2024-11-01 08:00:45,180 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2024-11-01 08:00:45,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-01 08:00:45,181 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:45,181 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 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] [2024-11-01 08:00:45,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2024-11-01 08:00:45,381 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 [2024-11-01 08:00:45,382 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:45,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:45,382 INFO L85 PathProgramCache]: Analyzing trace with hash -526560144, now seen corresponding path program 1 times [2024-11-01 08:00:45,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:45,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285033704] [2024-11-01 08:00:45,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:45,383 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:45,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:45,384 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) [2024-11-01 08:00:45,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-11-01 08:00:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:45,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:00:45,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2024-11-01 08:00:45,962 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2024-11-01 08:00:46,006 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:46,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285033704] [2024-11-01 08:00:46,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1285033704] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:00:46,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:00:46,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:00:46,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110173758] [2024-11-01 08:00:46,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:00:46,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:00:46,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:46,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:00:46,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:00:46,008 INFO L87 Difference]: Start difference. First operand 57 states and 67 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) [2024-11-01 08:00:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:46,083 INFO L93 Difference]: Finished difference Result 97 states and 119 transitions. [2024-11-01 08:00:46,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-01 08:00:46,088 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 59 [2024-11-01 08:00:46,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:46,089 INFO L225 Difference]: With dead ends: 97 [2024-11-01 08:00:46,089 INFO L226 Difference]: Without dead ends: 65 [2024-11-01 08:00:46,089 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-11-01 08:00:46,090 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 5 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:46,091 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 176 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:46,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-01 08:00:46,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-01 08:00:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 states have internal predecessors, (65), 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) [2024-11-01 08:00:46,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2024-11-01 08:00:46,097 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 59 [2024-11-01 08:00:46,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:46,097 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2024-11-01 08:00:46,097 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) [2024-11-01 08:00:46,097 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2024-11-01 08:00:46,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-01 08:00:46,098 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:46,098 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 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] [2024-11-01 08:00:46,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2024-11-01 08:00:46,299 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 [2024-11-01 08:00:46,299 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:46,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:46,300 INFO L85 PathProgramCache]: Analyzing trace with hash -47044248, now seen corresponding path program 2 times [2024-11-01 08:00:46,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:46,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685168079] [2024-11-01 08:00:46,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:46,300 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:46,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:46,301 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) [2024-11-01 08:00:46,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-11-01 08:00:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:46,890 INFO L255 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-01 08:00:46,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2024-11-01 08:00:46,954 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2024-11-01 08:00:47,073 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:47,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685168079] [2024-11-01 08:00:47,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1685168079] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:00:47,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:00:47,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-01 08:00:47,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774181793] [2024-11-01 08:00:47,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:00:47,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-01 08:00:47,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:47,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-01 08:00:47,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-11-01 08:00:47,076 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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) [2024-11-01 08:00:47,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:47,212 INFO L93 Difference]: Finished difference Result 101 states and 121 transitions. [2024-11-01 08:00:47,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-01 08:00:47,214 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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 67 [2024-11-01 08:00:47,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:47,215 INFO L225 Difference]: With dead ends: 101 [2024-11-01 08:00:47,215 INFO L226 Difference]: Without dead ends: 69 [2024-11-01 08:00:47,215 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-11-01 08:00:47,216 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:47,216 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 434 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:00:47,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-01 08:00:47,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-11-01 08:00:47,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 62 states have internal predecessors, (69), 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) [2024-11-01 08:00:47,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2024-11-01 08:00:47,223 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 67 [2024-11-01 08:00:47,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:47,223 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2024-11-01 08:00:47,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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) [2024-11-01 08:00:47,224 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2024-11-01 08:00:47,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-01 08:00:47,224 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:47,225 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 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] [2024-11-01 08:00:47,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2024-11-01 08:00:47,425 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 [2024-11-01 08:00:47,426 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:47,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:47,426 INFO L85 PathProgramCache]: Analyzing trace with hash -515774748, now seen corresponding path program 3 times [2024-11-01 08:00:47,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:47,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261457464] [2024-11-01 08:00:47,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:47,427 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:47,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:47,429 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) [2024-11-01 08:00:47,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2024-11-01 08:00:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:48,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-01 08:00:48,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-01 08:00:48,426 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-01 08:00:49,179 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:49,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261457464] [2024-11-01 08:00:49,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [261457464] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:49,179 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:49,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2024-11-01 08:00:49,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712487087] [2024-11-01 08:00:49,179 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:49,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:00:49,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:49,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:00:49,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:00:49,181 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 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) [2024-11-01 08:00:49,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:49,435 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2024-11-01 08:00:49,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-01 08:00:49,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 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 71 [2024-11-01 08:00:49,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:49,437 INFO L225 Difference]: With dead ends: 83 [2024-11-01 08:00:49,437 INFO L226 Difference]: Without dead ends: 81 [2024-11-01 08:00:49,437 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-01 08:00:49,438 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:49,441 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 187 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-01 08:00:49,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-01 08:00:49,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-01 08:00:49,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 69 states have internal predecessors, (76), 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) [2024-11-01 08:00:49,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2024-11-01 08:00:49,460 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 71 [2024-11-01 08:00:49,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:49,461 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2024-11-01 08:00:49,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 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) [2024-11-01 08:00:49,461 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2024-11-01 08:00:49,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-01 08:00:49,463 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:49,463 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 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] [2024-11-01 08:00:49,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2024-11-01 08:00:49,667 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 [2024-11-01 08:00:49,668 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:49,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:49,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1746558445, now seen corresponding path program 1 times [2024-11-01 08:00:49,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:49,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7015594] [2024-11-01 08:00:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:49,669 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:49,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:49,670 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) [2024-11-01 08:00:49,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-11-01 08:00:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:50,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:50,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2024-11-01 08:00:50,849 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2024-11-01 08:00:50,893 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:50,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7015594] [2024-11-01 08:00:50,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [7015594] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:50,894 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:50,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:50,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849147635] [2024-11-01 08:00:50,894 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:50,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:50,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:50,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:50,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:50,896 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2024-11-01 08:00:50,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:50,973 INFO L93 Difference]: Finished difference Result 115 states and 140 transitions. [2024-11-01 08:00:50,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:50,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 112 [2024-11-01 08:00:50,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:50,978 INFO L225 Difference]: With dead ends: 115 [2024-11-01 08:00:50,978 INFO L226 Difference]: Without dead ends: 84 [2024-11-01 08:00:50,978 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:50,979 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 133 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 [2024-11-01 08:00:50,979 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 133 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:00:50,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-01 08:00:50,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-01 08:00:50,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 72 states have (on average 1.0972222222222223) internal successors, (79), 72 states have internal predecessors, (79), 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) [2024-11-01 08:00:50,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2024-11-01 08:00:50,988 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 112 [2024-11-01 08:00:50,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:50,989 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2024-11-01 08:00:50,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2024-11-01 08:00:50,989 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2024-11-01 08:00:50,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-01 08:00:50,990 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:50,990 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 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] [2024-11-01 08:00:51,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2024-11-01 08:00:51,191 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 [2024-11-01 08:00:51,191 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:51,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:51,192 INFO L85 PathProgramCache]: Analyzing trace with hash -830156913, now seen corresponding path program 1 times [2024-11-01 08:00:51,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:51,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632202018] [2024-11-01 08:00:51,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:51,192 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:51,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:51,193 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) [2024-11-01 08:00:51,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2024-11-01 08:00:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:52,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:00:52,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2024-11-01 08:00:52,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2024-11-01 08:00:52,565 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:52,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632202018] [2024-11-01 08:00:52,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [632202018] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:00:52,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:00:52,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:00:52,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839690838] [2024-11-01 08:00:52,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:00:52,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:00:52,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:52,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:00:52,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:00:52,568 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 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) [2024-11-01 08:00:52,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:52,691 INFO L93 Difference]: Finished difference Result 126 states and 153 transitions. [2024-11-01 08:00:52,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-01 08:00:52,698 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 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 116 [2024-11-01 08:00:52,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:52,699 INFO L225 Difference]: With dead ends: 126 [2024-11-01 08:00:52,699 INFO L226 Difference]: Without dead ends: 92 [2024-11-01 08:00:52,699 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-11-01 08:00:52,700 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 5 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:52,700 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 262 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:00:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-01 08:00:52,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-01 08:00:52,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 80 states have (on average 1.0875) internal successors, (87), 80 states have internal predecessors, (87), 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) [2024-11-01 08:00:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2024-11-01 08:00:52,710 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 116 [2024-11-01 08:00:52,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:52,710 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2024-11-01 08:00:52,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 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) [2024-11-01 08:00:52,711 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2024-11-01 08:00:52,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-01 08:00:52,712 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:52,712 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 6, 6, 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] [2024-11-01 08:00:52,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2024-11-01 08:00:52,912 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 [2024-11-01 08:00:52,913 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:52,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:52,913 INFO L85 PathProgramCache]: Analyzing trace with hash 518049927, now seen corresponding path program 2 times [2024-11-01 08:00:52,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:52,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215047225] [2024-11-01 08:00:52,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:52,914 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:52,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:52,915 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) [2024-11-01 08:00:52,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2024-11-01 08:00:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:54,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-01 08:00:54,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 112 proven. 36 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2024-11-01 08:00:54,232 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2024-11-01 08:00:54,374 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:54,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215047225] [2024-11-01 08:00:54,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [215047225] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:00:54,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:00:54,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-01 08:00:54,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139610901] [2024-11-01 08:00:54,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:00:54,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-01 08:00:54,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:54,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-01 08:00:54,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-11-01 08:00:54,376 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 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) [2024-11-01 08:00:54,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:54,569 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2024-11-01 08:00:54,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-01 08:00:54,574 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 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 [2024-11-01 08:00:54,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:54,575 INFO L225 Difference]: With dead ends: 138 [2024-11-01 08:00:54,575 INFO L226 Difference]: Without dead ends: 96 [2024-11-01 08:00:54,575 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-11-01 08:00:54,576 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:54,576 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 348 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-01 08:00:54,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-01 08:00:54,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-11-01 08:00:54,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 84 states have internal predecessors, (91), 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) [2024-11-01 08:00:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2024-11-01 08:00:54,593 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 124 [2024-11-01 08:00:54,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:54,593 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2024-11-01 08:00:54,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 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) [2024-11-01 08:00:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2024-11-01 08:00:54,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-01 08:00:54,595 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:54,595 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2024-11-01 08:00:54,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2024-11-01 08:00:54,795 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 [2024-11-01 08:00:54,796 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:54,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:54,796 INFO L85 PathProgramCache]: Analyzing trace with hash -291789821, now seen corresponding path program 3 times [2024-11-01 08:00:54,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:54,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922541273] [2024-11-01 08:00:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:54,797 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:54,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:54,799 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) [2024-11-01 08:00:54,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2024-11-01 08:00:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:56,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 1228 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:56,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2024-11-01 08:00:56,076 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-11-01 08:00:56,119 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:56,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922541273] [2024-11-01 08:00:56,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [922541273] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:56,120 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:56,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:56,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713828281] [2024-11-01 08:00:56,120 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:56,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:56,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:56,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:56,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:56,122 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2024-11-01 08:00:56,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:56,161 INFO L93 Difference]: Finished difference Result 145 states and 170 transitions. [2024-11-01 08:00:56,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:56,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 [2024-11-01 08:00:56,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:56,165 INFO L225 Difference]: With dead ends: 145 [2024-11-01 08:00:56,165 INFO L226 Difference]: Without dead ends: 99 [2024-11-01 08:00:56,165 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 [2024-11-01 08:00:56,166 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 133 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 [2024-11-01 08:00:56,166 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 133 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:56,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-01 08:00:56,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-11-01 08:00:56,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.0804597701149425) internal successors, (94), 87 states have internal predecessors, (94), 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) [2024-11-01 08:00:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2024-11-01 08:00:56,175 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 128 [2024-11-01 08:00:56,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:56,175 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2024-11-01 08:00:56,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2024-11-01 08:00:56,176 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2024-11-01 08:00:56,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-01 08:00:56,177 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:56,177 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2024-11-01 08:00:56,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2024-11-01 08:00:56,377 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 [2024-11-01 08:00:56,378 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:56,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:56,378 INFO L85 PathProgramCache]: Analyzing trace with hash -297563905, now seen corresponding path program 1 times [2024-11-01 08:00:56,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:56,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746398621] [2024-11-01 08:00:56,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:56,379 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:56,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:56,380 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) [2024-11-01 08:00:56,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2024-11-01 08:00:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:57,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 1240 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:00:57,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2024-11-01 08:00:57,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-11-01 08:00:57,821 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:57,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746398621] [2024-11-01 08:00:57,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [746398621] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:00:57,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:00:57,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:00:57,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256086469] [2024-11-01 08:00:57,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:00:57,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:00:57,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:57,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:00:57,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:00:57,823 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 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) [2024-11-01 08:00:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:57,967 INFO L93 Difference]: Finished difference Result 156 states and 183 transitions. [2024-11-01 08:00:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-01 08:00:57,969 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 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 [2024-11-01 08:00:57,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:57,970 INFO L225 Difference]: With dead ends: 156 [2024-11-01 08:00:57,970 INFO L226 Difference]: Without dead ends: 107 [2024-11-01 08:00:57,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-11-01 08:00:57,971 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 4 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:57,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 176 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:00:57,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-01 08:00:57,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2024-11-01 08:00:57,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 95 states have (on average 1.0736842105263158) internal successors, (102), 95 states have internal predecessors, (102), 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) [2024-11-01 08:00:57,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2024-11-01 08:00:57,985 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 132 [2024-11-01 08:00:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:57,986 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2024-11-01 08:00:57,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 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) [2024-11-01 08:00:57,986 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2024-11-01 08:00:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-01 08:00:57,988 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:57,988 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 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] [2024-11-01 08:00:58,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2024-11-01 08:00:58,188 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 [2024-11-01 08:00:58,189 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:58,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:58,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1407600393, now seen corresponding path program 2 times [2024-11-01 08:00:58,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:58,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012883728] [2024-11-01 08:00:58,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:58,190 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:58,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:58,193 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) [2024-11-01 08:00:58,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2024-11-01 08:00:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:59,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-01 08:00:59,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 112 proven. 36 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2024-11-01 08:00:59,777 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-11-01 08:00:59,926 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:59,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012883728] [2024-11-01 08:00:59,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2012883728] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:00:59,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:00:59,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-01 08:00:59,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923612829] [2024-11-01 08:00:59,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:00:59,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-01 08:00:59,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:59,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-01 08:00:59,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-11-01 08:00:59,928 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 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) [2024-11-01 08:01:00,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:00,128 INFO L93 Difference]: Finished difference Result 168 states and 193 transitions. [2024-11-01 08:01:00,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-01 08:01:00,129 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 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 140 [2024-11-01 08:01:00,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:00,131 INFO L225 Difference]: With dead ends: 168 [2024-11-01 08:01:00,131 INFO L226 Difference]: Without dead ends: 111 [2024-11-01 08:01:00,132 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-11-01 08:01:00,132 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 3 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:00,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 391 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-01 08:01:00,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-01 08:01:00,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-11-01 08:01:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.0707070707070707) internal successors, (106), 99 states have internal predecessors, (106), 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) [2024-11-01 08:01:00,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 126 transitions. [2024-11-01 08:01:00,143 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 126 transitions. Word has length 140 [2024-11-01 08:01:00,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:00,144 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 126 transitions. [2024-11-01 08:01:00,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 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) [2024-11-01 08:01:00,144 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 126 transitions. [2024-11-01 08:01:00,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-01 08:01:00,145 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:00,145 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2024-11-01 08:01:00,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2024-11-01 08:01:00,346 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 [2024-11-01 08:01:00,346 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:00,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:00,347 INFO L85 PathProgramCache]: Analyzing trace with hash -469367821, now seen corresponding path program 3 times [2024-11-01 08:01:00,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:00,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88511837] [2024-11-01 08:01:00,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:00,347 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:00,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:00,350 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) [2024-11-01 08:01:00,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2024-11-01 08:01:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:01,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 1276 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:01,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-11-01 08:01:01,851 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2024-11-01 08:01:01,897 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:01,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88511837] [2024-11-01 08:01:01,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [88511837] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:01,897 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:01,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:01,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413385249] [2024-11-01 08:01:01,897 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:01,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:01,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:01,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:01,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:01,899 INFO L87 Difference]: Start difference. First operand 111 states and 126 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2024-11-01 08:01:01,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:01,936 INFO L93 Difference]: Finished difference Result 175 states and 200 transitions. [2024-11-01 08:01:01,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:01,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 [2024-11-01 08:01:01,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:01,939 INFO L225 Difference]: With dead ends: 175 [2024-11-01 08:01:01,939 INFO L226 Difference]: Without dead ends: 114 [2024-11-01 08:01:01,940 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 [2024-11-01 08:01:01,940 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 133 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 [2024-11-01 08:01:01,941 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 133 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-01 08:01:01,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-11-01 08:01:01,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 102 states have (on average 1.0686274509803921) internal successors, (109), 102 states have internal predecessors, (109), 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) [2024-11-01 08:01:01,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 129 transitions. [2024-11-01 08:01:01,958 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 129 transitions. Word has length 144 [2024-11-01 08:01:01,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:01,959 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 129 transitions. [2024-11-01 08:01:01,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2024-11-01 08:01:01,959 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 129 transitions. [2024-11-01 08:01:01,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-01 08:01:01,960 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:01,960 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2024-11-01 08:01:01,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2024-11-01 08:01:02,161 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 [2024-11-01 08:01:02,161 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:02,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:02,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1956806545, now seen corresponding path program 1 times [2024-11-01 08:01:02,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:02,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701216390] [2024-11-01 08:01:02,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:02,162 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:02,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:02,165 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) [2024-11-01 08:01:02,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2024-11-01 08:01:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:03,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 1288 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:03,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-11-01 08:01:03,701 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2024-11-01 08:01:03,811 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:03,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701216390] [2024-11-01 08:01:03,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [701216390] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:03,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:03,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:03,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873445014] [2024-11-01 08:01:03,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:03,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:03,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:03,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:03,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:03,813 INFO L87 Difference]: Start difference. First operand 114 states and 129 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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) [2024-11-01 08:01:03,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:03,896 INFO L93 Difference]: Finished difference Result 186 states and 213 transitions. [2024-11-01 08:01:03,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-01 08:01:03,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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 [2024-11-01 08:01:03,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:03,898 INFO L225 Difference]: With dead ends: 186 [2024-11-01 08:01:03,898 INFO L226 Difference]: Without dead ends: 122 [2024-11-01 08:01:03,898 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-11-01 08:01:03,899 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 4 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:03,899 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 176 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:01:03,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-01 08:01:03,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2024-11-01 08:01:03,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 110 states have (on average 1.0636363636363637) internal successors, (117), 110 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) [2024-11-01 08:01:03,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 137 transitions. [2024-11-01 08:01:03,910 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 137 transitions. Word has length 148 [2024-11-01 08:01:03,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:03,911 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 137 transitions. [2024-11-01 08:01:03,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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) [2024-11-01 08:01:03,911 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 137 transitions. [2024-11-01 08:01:03,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-01 08:01:03,915 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:03,915 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 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] [2024-11-01 08:01:03,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:04,115 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 [2024-11-01 08:01:04,116 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:04,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:04,116 INFO L85 PathProgramCache]: Analyzing trace with hash -525623449, now seen corresponding path program 2 times [2024-11-01 08:01:04,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:04,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908390393] [2024-11-01 08:01:04,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:04,117 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:04,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:04,119 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) [2024-11-01 08:01:04,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2024-11-01 08:01:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:05,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-01 08:01:05,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 112 proven. 36 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-11-01 08:01:05,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2024-11-01 08:01:05,879 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:05,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908390393] [2024-11-01 08:01:05,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1908390393] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:05,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:05,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-01 08:01:05,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796753466] [2024-11-01 08:01:05,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:05,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-01 08:01:05,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:05,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-01 08:01:05,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-11-01 08:01:05,881 INFO L87 Difference]: Start difference. First operand 122 states and 137 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 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) [2024-11-01 08:01:06,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:06,004 INFO L93 Difference]: Finished difference Result 198 states and 223 transitions. [2024-11-01 08:01:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-01 08:01:06,004 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 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 156 [2024-11-01 08:01:06,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:06,006 INFO L225 Difference]: With dead ends: 198 [2024-11-01 08:01:06,006 INFO L226 Difference]: Without dead ends: 126 [2024-11-01 08:01:06,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-11-01 08:01:06,007 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 3 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:06,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 434 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:01:06,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-01 08:01:06,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-11-01 08:01:06,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 114 states have (on average 1.0614035087719298) internal successors, (121), 114 states have internal predecessors, (121), 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) [2024-11-01 08:01:06,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 141 transitions. [2024-11-01 08:01:06,019 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 141 transitions. Word has length 156 [2024-11-01 08:01:06,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:06,019 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 141 transitions. [2024-11-01 08:01:06,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 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) [2024-11-01 08:01:06,020 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 141 transitions. [2024-11-01 08:01:06,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-01 08:01:06,021 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:06,021 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2024-11-01 08:01:06,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:06,221 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 [2024-11-01 08:01:06,222 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:06,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:06,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1008746979, now seen corresponding path program 3 times [2024-11-01 08:01:06,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:06,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215266049] [2024-11-01 08:01:06,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:06,223 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:06,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:06,224 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) [2024-11-01 08:01:06,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2024-11-01 08:01:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:07,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:07,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2024-11-01 08:01:07,890 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2024-11-01 08:01:07,932 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:07,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215266049] [2024-11-01 08:01:07,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1215266049] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:07,933 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:07,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:07,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099343811] [2024-11-01 08:01:07,933 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:07,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:07,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:07,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:07,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:07,935 INFO L87 Difference]: Start difference. First operand 126 states and 141 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2024-11-01 08:01:07,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:07,965 INFO L93 Difference]: Finished difference Result 205 states and 230 transitions. [2024-11-01 08:01:07,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:07,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 [2024-11-01 08:01:07,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:07,967 INFO L225 Difference]: With dead ends: 205 [2024-11-01 08:01:07,967 INFO L226 Difference]: Without dead ends: 129 [2024-11-01 08:01:07,967 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 [2024-11-01 08:01:07,967 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 3 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 90 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 [2024-11-01 08:01:07,968 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 90 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:07,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-01 08:01:07,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2024-11-01 08:01:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 117 states have (on average 1.0598290598290598) internal successors, (124), 117 states have internal predecessors, (124), 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) [2024-11-01 08:01:07,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2024-11-01 08:01:07,977 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 160 [2024-11-01 08:01:07,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:07,978 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2024-11-01 08:01:07,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2024-11-01 08:01:07,978 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2024-11-01 08:01:07,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-11-01 08:01:07,979 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:07,979 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2024-11-01 08:01:08,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2024-11-01 08:01:08,180 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 [2024-11-01 08:01:08,180 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:08,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:08,181 INFO L85 PathProgramCache]: Analyzing trace with hash 134624735, now seen corresponding path program 1 times [2024-11-01 08:01:08,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:08,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124965596] [2024-11-01 08:01:08,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:08,181 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:08,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:08,182 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) [2024-11-01 08:01:08,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2024-11-01 08:01:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:09,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 1336 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:09,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2024-11-01 08:01:09,914 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2024-11-01 08:01:09,968 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:09,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124965596] [2024-11-01 08:01:09,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1124965596] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:09,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:09,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:09,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287361714] [2024-11-01 08:01:09,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:09,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:09,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:09,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:09,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:09,970 INFO L87 Difference]: Start difference. First operand 129 states and 144 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 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) [2024-11-01 08:01:10,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:10,037 INFO L93 Difference]: Finished difference Result 216 states and 243 transitions. [2024-11-01 08:01:10,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-01 08:01:10,038 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 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 [2024-11-01 08:01:10,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:10,040 INFO L225 Difference]: With dead ends: 216 [2024-11-01 08:01:10,040 INFO L226 Difference]: Without dead ends: 137 [2024-11-01 08:01:10,040 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-11-01 08:01:10,041 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 4 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:10,041 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 219 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:10,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-01 08:01:10,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2024-11-01 08:01:10,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 125 states have (on average 1.056) internal successors, (132), 125 states have internal predecessors, (132), 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) [2024-11-01 08:01:10,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 152 transitions. [2024-11-01 08:01:10,052 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 152 transitions. Word has length 164 [2024-11-01 08:01:10,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:10,053 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 152 transitions. [2024-11-01 08:01:10,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 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) [2024-11-01 08:01:10,053 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 152 transitions. [2024-11-01 08:01:10,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-11-01 08:01:10,055 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:10,055 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 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] [2024-11-01 08:01:10,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:10,255 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 [2024-11-01 08:01:10,255 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:10,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:10,256 INFO L85 PathProgramCache]: Analyzing trace with hash -952499241, now seen corresponding path program 2 times [2024-11-01 08:01:10,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:10,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312307205] [2024-11-01 08:01:10,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:10,257 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:10,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:10,260 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) [2024-11-01 08:01:10,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2024-11-01 08:01:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:12,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 1360 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-01 08:01:12,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 112 proven. 36 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2024-11-01 08:01:12,120 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2024-11-01 08:01:12,234 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:12,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312307205] [2024-11-01 08:01:12,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [312307205] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:12,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:12,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-01 08:01:12,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110520994] [2024-11-01 08:01:12,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:12,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-01 08:01:12,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:12,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-01 08:01:12,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-11-01 08:01:12,236 INFO L87 Difference]: Start difference. First operand 137 states and 152 transitions. Second operand has 16 states, 16 states have (on average 4.5) internal successors, (72), 16 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) [2024-11-01 08:01:12,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:12,339 INFO L93 Difference]: Finished difference Result 228 states and 253 transitions. [2024-11-01 08:01:12,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-01 08:01:12,340 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 16 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 172 [2024-11-01 08:01:12,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:12,341 INFO L225 Difference]: With dead ends: 228 [2024-11-01 08:01:12,341 INFO L226 Difference]: Without dead ends: 141 [2024-11-01 08:01:12,342 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-11-01 08:01:12,342 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 3 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:12,343 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 348 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:01:12,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-01 08:01:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2024-11-01 08:01:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 129 states have (on average 1.054263565891473) internal successors, (136), 129 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) [2024-11-01 08:01:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2024-11-01 08:01:12,353 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 172 [2024-11-01 08:01:12,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:12,353 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2024-11-01 08:01:12,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 16 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) [2024-11-01 08:01:12,354 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2024-11-01 08:01:12,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2024-11-01 08:01:12,355 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:12,355 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2024-11-01 08:01:12,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2024-11-01 08:01:12,556 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 [2024-11-01 08:01:12,556 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:12,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:12,557 INFO L85 PathProgramCache]: Analyzing trace with hash 197516755, now seen corresponding path program 3 times [2024-11-01 08:01:12,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:12,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310250032] [2024-11-01 08:01:12,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:12,557 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:12,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:12,559 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) [2024-11-01 08:01:12,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2024-11-01 08:01:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:14,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 1372 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-01 08:01:14,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2024-11-01 08:01:15,514 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2024-11-01 08:01:18,468 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:18,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310250032] [2024-11-01 08:01:18,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [310250032] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:18,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:18,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2024-11-01 08:01:18,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504229609] [2024-11-01 08:01:18,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:18,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-01 08:01:18,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:18,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-01 08:01:18,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2024-11-01 08:01:18,471 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand has 19 states, 17 states have (on average 5.294117647058823) internal successors, (90), 19 states have internal predecessors, (90), 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) [2024-11-01 08:01:19,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:19,196 INFO L93 Difference]: Finished difference Result 265 states and 291 transitions. [2024-11-01 08:01:19,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-01 08:01:19,196 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 5.294117647058823) internal successors, (90), 19 states have internal predecessors, (90), 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) Word has length 176 [2024-11-01 08:01:19,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:19,197 INFO L225 Difference]: With dead ends: 265 [2024-11-01 08:01:19,198 INFO L226 Difference]: Without dead ends: 263 [2024-11-01 08:01:19,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2024-11-01 08:01:19,198 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 153 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:19,199 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 426 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-01 08:01:19,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-11-01 08:01:19,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 226. [2024-11-01 08:01:19,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 209 states have (on average 1.0526315789473684) internal successors, (220), 209 states have internal predecessors, (220), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-01 08:01:19,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 250 transitions. [2024-11-01 08:01:19,219 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 250 transitions. Word has length 176 [2024-11-01 08:01:19,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:19,219 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 250 transitions. [2024-11-01 08:01:19,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 5.294117647058823) internal successors, (90), 19 states have internal predecessors, (90), 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) [2024-11-01 08:01:19,220 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 250 transitions. [2024-11-01 08:01:19,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2024-11-01 08:01:19,221 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:19,221 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:19,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:19,422 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 [2024-11-01 08:01:19,422 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:19,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:19,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1897711676, now seen corresponding path program 4 times [2024-11-01 08:01:19,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:19,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312238026] [2024-11-01 08:01:19,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:19,423 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:19,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:19,424 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) [2024-11-01 08:01:19,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2024-11-01 08:01:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:23,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 2288 conjuncts, 215 conjuncts are in the unsatisfiable core [2024-11-01 08:01:23,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 72 proven. 657 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2024-11-01 08:01:35,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:39,930 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-01 08:01:39,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-11-01 08:01:39,931 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:39,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312238026] [2024-11-01 08:01:39,932 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-01 08:01:39,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2024-11-01 08:01:40,132 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 [2024-11-01 08:01:40,133 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:281) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:842) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:786) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:374) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:323) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:553) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:395) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:324) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:180) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:113) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:210) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 44 more [2024-11-01 08:01:40,137 INFO L158 Benchmark]: Toolchain (without parser) took 61982.27ms. Allocated memory was 200.3MB in the beginning and 848.3MB in the end (delta: 648.0MB). Free memory was 175.2MB in the beginning and 783.2MB in the end (delta: -608.0MB). Peak memory consumption was 41.0MB. Max. memory is 8.0GB. [2024-11-01 08:01:40,137 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 200.3MB. Free memory was 175.9MB in the beginning and 175.8MB in the end (delta: 141.4kB). There was no memory consumed. Max. memory is 8.0GB. [2024-11-01 08:01:40,137 INFO L158 Benchmark]: CACSL2BoogieTranslator took 660.74ms. Allocated memory is still 200.3MB. Free memory was 174.7MB in the beginning and 136.9MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 8.0GB. [2024-11-01 08:01:40,138 INFO L158 Benchmark]: Boogie Procedure Inliner took 112.97ms. Allocated memory is still 200.3MB. Free memory was 136.9MB in the beginning and 129.6MB in the end (delta: 7.3MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2024-11-01 08:01:40,138 INFO L158 Benchmark]: Boogie Preprocessor took 106.03ms. Allocated memory is still 200.3MB. Free memory was 129.6MB in the beginning and 120.1MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2024-11-01 08:01:40,138 INFO L158 Benchmark]: RCFGBuilder took 1213.06ms. Allocated memory was 200.3MB in the beginning and 263.2MB in the end (delta: 62.9MB). Free memory was 120.1MB in the beginning and 186.7MB in the end (delta: -66.6MB). Peak memory consumption was 65.0MB. Max. memory is 8.0GB. [2024-11-01 08:01:40,138 INFO L158 Benchmark]: TraceAbstraction took 59883.54ms. Allocated memory was 263.2MB in the beginning and 848.3MB in the end (delta: 585.1MB). Free memory was 186.2MB in the beginning and 783.2MB in the end (delta: -597.0MB). There was no memory consumed. Max. memory is 8.0GB. [2024-11-01 08:01:40,140 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 200.3MB. Free memory was 175.9MB in the beginning and 175.8MB in the end (delta: 141.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 660.74ms. Allocated memory is still 200.3MB. Free memory was 174.7MB in the beginning and 136.9MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 112.97ms. Allocated memory is still 200.3MB. Free memory was 136.9MB in the beginning and 129.6MB in the end (delta: 7.3MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 106.03ms. Allocated memory is still 200.3MB. Free memory was 129.6MB in the beginning and 120.1MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * RCFGBuilder took 1213.06ms. Allocated memory was 200.3MB in the beginning and 263.2MB in the end (delta: 62.9MB). Free memory was 120.1MB in the beginning and 186.7MB in the end (delta: -66.6MB). Peak memory consumption was 65.0MB. Max. memory is 8.0GB. * TraceAbstraction took 59883.54ms. Allocated memory was 263.2MB in the beginning and 848.3MB in the end (delta: 585.1MB). Free memory was 186.2MB in the beginning and 783.2MB in the end (delta: -597.0MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...