/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'cvc4 --incremental --print-success --lang smt' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.unsafe_arbitrated_fifos_n2d8w8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-11-01 08:00:38,313 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-01 08:00:38,381 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 08:00:38,385 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-01 08:00:38,385 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-01 08:00:38,435 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-01 08:00:38,435 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-01 08:00:38,436 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-01 08:00:38,438 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-01 08:00:38,439 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-01 08:00:38,439 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-01 08:00:38,439 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-01 08:00:38,440 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-01 08:00:38,441 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-01 08:00:38,443 INFO L153 SettingsManager]: * Use SBE=true [2024-11-01 08:00:38,443 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-01 08:00:38,444 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-01 08:00:38,446 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-01 08:00:38,446 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-01 08:00:38,446 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-01 08:00:38,447 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-01 08:00:38,447 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-01 08:00:38,447 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-01 08:00:38,448 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-01 08:00:38,448 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-01 08:00:38,448 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-01 08:00:38,448 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-01 08:00:38,449 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-01 08:00:38,449 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-01 08:00:38,449 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-01 08:00:38,449 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-01 08:00:38,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-01 08:00:38,450 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-01 08:00:38,450 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-01 08:00:38,450 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-01 08:00:38,451 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-01 08:00:38,451 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:38,451 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-01 08:00:38,451 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-01 08:00:38,452 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-01 08:00:38,452 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-01 08:00:38,452 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-11-01 08:00:38,452 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:38,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-01 08:00:38,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-01 08:00:38,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-01 08:00:38,815 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-01 08:00:38,815 INFO L274 PluginConnector]: CDTParser initialized [2024-11-01 08:00:38,818 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.unsafe_arbitrated_fifos_n2d8w8.c [2024-11-01 08:00:40,326 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-01 08:00:40,644 INFO L384 CDTParser]: Found 1 translation units. [2024-11-01 08:00:40,645 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.unsafe_arbitrated_fifos_n2d8w8.c [2024-11-01 08:00:40,665 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c90fedd0e/7067eb5f3d2b4b688ed2c1b0e8d797ce/FLAG07ab5d442 [2024-11-01 08:00:40,909 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c90fedd0e/7067eb5f3d2b4b688ed2c1b0e8d797ce [2024-11-01 08:00:40,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-01 08:00:40,912 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-01 08:00:40,913 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-01 08:00:40,913 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-01 08:00:40,917 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-01 08:00:40,918 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 08:00:40" (1/1) ... [2024-11-01 08:00:40,918 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68dc8ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:40, skipping insertion in model container [2024-11-01 08:00:40,919 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 08:00:40" (1/1) ... [2024-11-01 08:00:40,975 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-01 08:00:41,181 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.unsafe_arbitrated_fifos_n2d8w8.c[1270,1283] [2024-11-01 08:00:41,435 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-01 08:00:41,449 INFO L200 MainTranslator]: Completed pre-run [2024-11-01 08:00:41,460 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.unsafe_arbitrated_fifos_n2d8w8.c[1270,1283] [2024-11-01 08:00:41,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-01 08:00:41,603 INFO L204 MainTranslator]: Completed translation [2024-11-01 08:00:41,603 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:41 WrapperNode [2024-11-01 08:00:41,603 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-01 08:00:41,604 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-01 08:00:41,604 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-01 08:00:41,604 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-01 08:00:41,611 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:41" (1/1) ... [2024-11-01 08:00:41,645 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:41" (1/1) ... [2024-11-01 08:00:41,727 INFO L138 Inliner]: procedures = 18, calls = 41, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 953 [2024-11-01 08:00:41,728 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-01 08:00:41,729 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-01 08:00:41,729 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-01 08:00:41,729 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-01 08:00:41,741 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:41" (1/1) ... [2024-11-01 08:00:41,741 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:41" (1/1) ... [2024-11-01 08:00:41,761 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:41" (1/1) ... [2024-11-01 08:00:41,801 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 08:00:41,802 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:41" (1/1) ... [2024-11-01 08:00:41,802 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:41" (1/1) ... [2024-11-01 08:00:41,839 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:41" (1/1) ... [2024-11-01 08:00:41,852 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:41" (1/1) ... [2024-11-01 08:00:41,856 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:41" (1/1) ... [2024-11-01 08:00:41,870 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:41" (1/1) ... [2024-11-01 08:00:41,891 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-01 08:00:41,892 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-01 08:00:41,892 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-01 08:00:41,892 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-01 08:00:41,894 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:41" (1/1) ... [2024-11-01 08:00:41,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-01 08:00:41,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-01 08:00:41,928 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 08:00:41,932 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 08:00:42,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-01 08:00:42,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2024-11-01 08:00:42,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2024-11-01 08:00:42,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2024-11-01 08:00:42,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-01 08:00:42,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-01 08:00:42,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-01 08:00:42,011 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-01 08:00:42,011 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-01 08:00:42,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-01 08:00:42,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-01 08:00:42,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-01 08:00:42,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2024-11-01 08:00:42,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#1 [2024-11-01 08:00:42,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#2 [2024-11-01 08:00:42,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-01 08:00:42,262 INFO L238 CfgBuilder]: Building ICFG [2024-11-01 08:00:42,264 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-01 08:00:43,089 INFO L? ?]: Removed 675 outVars from TransFormulas that were not future-live. [2024-11-01 08:00:43,090 INFO L287 CfgBuilder]: Performing block encoding [2024-11-01 08:00:43,102 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-01 08:00:43,103 INFO L316 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-01 08:00:43,104 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.11 08:00:43 BoogieIcfgContainer [2024-11-01 08:00:43,104 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-01 08:00:43,108 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-01 08:00:43,108 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-01 08:00:43,111 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-01 08:00:43,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.11 08:00:40" (1/3) ... [2024-11-01 08:00:43,113 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d34aba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.11 08:00:43, skipping insertion in model container [2024-11-01 08:00:43,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:41" (2/3) ... [2024-11-01 08:00:43,113 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d34aba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.11 08:00:43, skipping insertion in model container [2024-11-01 08:00:43,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.11 08:00:43" (3/3) ... [2024-11-01 08:00:43,115 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.unsafe_arbitrated_fifos_n2d8w8.c [2024-11-01 08:00:43,132 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-01 08:00:43,132 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-01 08:00:43,192 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-01 08:00:43,197 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;@6c2e0d25, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-01 08:00:43,197 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-01 08:00:43,200 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 08:00:43,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-01 08:00:43,207 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:43,208 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 08:00:43,208 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:43,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:43,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1919498836, now seen corresponding path program 1 times [2024-11-01 08:00:43,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:43,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105716393] [2024-11-01 08:00:43,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:43,221 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:43,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:43,224 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 08:00:43,240 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 08:00:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:43,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-01 08:00:43,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:43,901 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 08:00:43,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:43,934 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 08:00:43,935 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:43,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105716393] [2024-11-01 08:00:43,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2105716393] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:43,936 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:43,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-11-01 08:00:43,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140792666] [2024-11-01 08:00:43,938 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:43,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-01 08:00:43,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:43,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-01 08:00:43,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-01 08:00:43,972 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 08:00:43,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:43,994 INFO L93 Difference]: Finished difference Result 77 states and 117 transitions. [2024-11-01 08:00:43,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-01 08:00:43,997 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 08:00:43,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:44,002 INFO L225 Difference]: With dead ends: 77 [2024-11-01 08:00:44,003 INFO L226 Difference]: Without dead ends: 39 [2024-11-01 08:00:44,006 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 08:00:44,011 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 08:00:44,014 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 08:00:44,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-01 08:00:44,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-01 08:00:44,052 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 08:00:44,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2024-11-01 08:00:44,057 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 39 [2024-11-01 08:00:44,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:44,058 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2024-11-01 08:00:44,058 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 08:00:44,058 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2024-11-01 08:00:44,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-01 08:00:44,061 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:44,061 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 08:00:44,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Forceful destruction successful, exit code 0 [2024-11-01 08:00:44,265 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 08:00:44,266 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:44,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:44,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1633554172, now seen corresponding path program 1 times [2024-11-01 08:00:44,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:44,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834813151] [2024-11-01 08:00:44,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:44,268 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:44,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:44,271 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 08:00:44,272 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 08:00:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:44,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:44,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:44,862 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 08:00:44,862 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:44,916 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 08:00:44,917 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:44,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834813151] [2024-11-01 08:00:44,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [834813151] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:44,917 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:44,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:44,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862968792] [2024-11-01 08:00:44,918 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:44,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:44,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:44,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:44,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:44,921 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 08:00:44,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:44,954 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2024-11-01 08:00:44,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:44,955 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 08:00:44,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:44,956 INFO L225 Difference]: With dead ends: 77 [2024-11-01 08:00:44,956 INFO L226 Difference]: Without dead ends: 42 [2024-11-01 08:00:44,957 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 08:00:44,958 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 08:00:44,958 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 08:00:44,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-01 08:00:44,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-01 08:00:44,964 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 08:00:44,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2024-11-01 08:00:44,965 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 39 [2024-11-01 08:00:44,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:44,965 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2024-11-01 08:00:44,965 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 08:00:44,966 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2024-11-01 08:00:44,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-01 08:00:44,968 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:44,968 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 08:00:44,976 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 08:00:45,169 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 08:00:45,169 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:45,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:45,170 INFO L85 PathProgramCache]: Analyzing trace with hash -682782464, now seen corresponding path program 1 times [2024-11-01 08:00:45,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:45,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611827166] [2024-11-01 08:00:45,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:45,170 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:45,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:45,174 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 08:00:45,175 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 08:00:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:45,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:00:45,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:45,768 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 08:00:45,768 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:45,834 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 08:00:45,835 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:45,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611827166] [2024-11-01 08:00:45,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [611827166] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:00:45,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:00:45,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:00:45,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302115928] [2024-11-01 08:00:45,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:00:45,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:00:45,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:45,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:00:45,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:00:45,840 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 08:00:45,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:45,943 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2024-11-01 08:00:45,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-01 08:00:45,947 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 08:00:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:45,948 INFO L225 Difference]: With dead ends: 85 [2024-11-01 08:00:45,948 INFO L226 Difference]: Without dead ends: 50 [2024-11-01 08:00:45,948 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 08:00:45,949 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 08:00:45,950 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 08:00:45,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-01 08:00:45,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-01 08:00:45,960 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 08:00:45,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-11-01 08:00:45,961 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 43 [2024-11-01 08:00:45,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:45,961 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-11-01 08:00:45,962 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 08:00:45,962 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-11-01 08:00:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-01 08:00:45,965 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:45,965 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 08:00:45,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2024-11-01 08:00:46,165 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 08:00:46,166 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:46,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:46,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1659549432, now seen corresponding path program 2 times [2024-11-01 08:00:46,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:46,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749569210] [2024-11-01 08:00:46,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:46,167 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:46,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:46,170 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 08:00:46,171 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 08:00:46,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:46,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-01 08:00:46,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:46,875 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 08:00:46,875 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:47,026 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 08:00:47,027 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:47,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749569210] [2024-11-01 08:00:47,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [749569210] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:00:47,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:00:47,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-01 08:00:47,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150362746] [2024-11-01 08:00:47,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:00:47,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-01 08:00:47,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:47,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-01 08:00:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-11-01 08:00:47,030 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 08:00:47,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:47,178 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2024-11-01 08:00:47,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-01 08:00:47,182 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 08:00:47,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:47,183 INFO L225 Difference]: With dead ends: 89 [2024-11-01 08:00:47,183 INFO L226 Difference]: Without dead ends: 54 [2024-11-01 08:00:47,184 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 08:00:47,185 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 08:00:47,185 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 08:00:47,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-01 08:00:47,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-01 08:00:47,192 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 08:00:47,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2024-11-01 08:00:47,192 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 51 [2024-11-01 08:00:47,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:47,193 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2024-11-01 08:00:47,193 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 08:00:47,193 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2024-11-01 08:00:47,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-01 08:00:47,194 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:47,195 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 08:00:47,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2024-11-01 08:00:47,395 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 08:00:47,396 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:47,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:47,396 INFO L85 PathProgramCache]: Analyzing trace with hash 488258804, now seen corresponding path program 3 times [2024-11-01 08:00:47,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:47,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799802775] [2024-11-01 08:00:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:47,397 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:47,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:47,398 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 08:00:47,399 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 08:00:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:47,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:47,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:47,994 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 08:00:47,994 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:48,021 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 08:00:48,021 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:48,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799802775] [2024-11-01 08:00:48,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1799802775] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:48,022 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:48,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:48,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155804403] [2024-11-01 08:00:48,022 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:48,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:48,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:48,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:48,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:48,025 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 08:00:48,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:48,053 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2024-11-01 08:00:48,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:48,054 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 08:00:48,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:48,055 INFO L225 Difference]: With dead ends: 89 [2024-11-01 08:00:48,055 INFO L226 Difference]: Without dead ends: 57 [2024-11-01 08:00:48,056 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 08:00:48,057 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 08:00:48,057 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 08:00:48,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-01 08:00:48,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-01 08:00:48,062 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 08:00:48,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2024-11-01 08:00:48,063 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 55 [2024-11-01 08:00:48,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:48,063 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2024-11-01 08:00:48,063 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 08:00:48,064 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2024-11-01 08:00:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-01 08:00:48,064 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:48,064 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 08:00:48,074 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 08:00:48,265 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 08:00:48,266 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:48,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:48,266 INFO L85 PathProgramCache]: Analyzing trace with hash -526560144, now seen corresponding path program 1 times [2024-11-01 08:00:48,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:48,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927049983] [2024-11-01 08:00:48,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:48,266 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:48,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:48,268 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 08:00:48,269 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 08:00:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:48,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:00:48,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:48,880 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 08:00:48,880 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:48,928 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 08:00:48,929 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:48,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927049983] [2024-11-01 08:00:48,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [927049983] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:00:48,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:00:48,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:00:48,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678934360] [2024-11-01 08:00:48,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:00:48,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:00:48,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:48,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:00:48,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:00:48,931 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 08:00:49,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:49,007 INFO L93 Difference]: Finished difference Result 97 states and 119 transitions. [2024-11-01 08:00:49,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-01 08:00:49,014 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 08:00:49,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:49,015 INFO L225 Difference]: With dead ends: 97 [2024-11-01 08:00:49,015 INFO L226 Difference]: Without dead ends: 65 [2024-11-01 08:00:49,016 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 08:00:49,017 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 08:00:49,017 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 08:00:49,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-01 08:00:49,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-01 08:00:49,026 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 08:00:49,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2024-11-01 08:00:49,029 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 59 [2024-11-01 08:00:49,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:49,029 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2024-11-01 08:00:49,030 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 08:00:49,030 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2024-11-01 08:00:49,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-01 08:00:49,032 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:49,032 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 08:00:49,041 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 08:00:49,232 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 08:00:49,233 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:49,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:49,233 INFO L85 PathProgramCache]: Analyzing trace with hash -47044248, now seen corresponding path program 2 times [2024-11-01 08:00:49,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:49,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636684395] [2024-11-01 08:00:49,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:49,234 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:49,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:49,235 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 08:00:49,236 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 08:00:49,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:49,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-01 08:00:49,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:49,879 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 08:00:49,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:49,995 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 08:00:49,996 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:49,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636684395] [2024-11-01 08:00:49,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [636684395] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:00:49,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:00:49,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-01 08:00:49,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74789943] [2024-11-01 08:00:49,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:00:49,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-01 08:00:49,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:49,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-01 08:00:49,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-11-01 08:00:49,998 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 08:00:50,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:50,115 INFO L93 Difference]: Finished difference Result 101 states and 121 transitions. [2024-11-01 08:00:50,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-01 08:00:50,118 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 08:00:50,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:50,121 INFO L225 Difference]: With dead ends: 101 [2024-11-01 08:00:50,121 INFO L226 Difference]: Without dead ends: 69 [2024-11-01 08:00:50,121 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 08:00:50,122 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 08:00:50,122 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 08:00:50,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-01 08:00:50,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-11-01 08:00:50,128 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 08:00:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2024-11-01 08:00:50,129 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 67 [2024-11-01 08:00:50,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:50,130 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2024-11-01 08:00:50,130 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 08:00:50,130 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2024-11-01 08:00:50,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-01 08:00:50,131 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:50,131 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 08:00:50,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2024-11-01 08:00:50,332 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 08:00:50,332 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:50,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:50,333 INFO L85 PathProgramCache]: Analyzing trace with hash -515774748, now seen corresponding path program 3 times [2024-11-01 08:00:50,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:50,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584088701] [2024-11-01 08:00:50,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:50,333 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:50,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:50,336 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 08:00:50,337 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 08:00:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:50,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-01 08:00:50,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:51,399 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 08:00:51,399 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:52,275 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 08:00:52,276 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:52,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584088701] [2024-11-01 08:00:52,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [584088701] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:52,276 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:52,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2024-11-01 08:00:52,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820854985] [2024-11-01 08:00:52,277 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:52,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:00:52,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:52,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:00:52,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:00:52,280 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 08:00:52,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:52,553 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2024-11-01 08:00:52,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-01 08:00:52,554 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 08:00:52,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:52,556 INFO L225 Difference]: With dead ends: 83 [2024-11-01 08:00:52,556 INFO L226 Difference]: Without dead ends: 81 [2024-11-01 08:00:52,557 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 08:00:52,557 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 08:00:52,558 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 08:00:52,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-01 08:00:52,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-01 08:00:52,573 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 08:00:52,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2024-11-01 08:00:52,575 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 71 [2024-11-01 08:00:52,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:52,577 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2024-11-01 08:00:52,577 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 08:00:52,577 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2024-11-01 08:00:52,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-01 08:00:52,579 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:52,579 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 08:00:52,593 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 08:00:52,779 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 08:00:52,780 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:52,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:52,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1746558445, now seen corresponding path program 1 times [2024-11-01 08:00:52,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:52,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890859958] [2024-11-01 08:00:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:52,781 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:52,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:52,782 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 08:00:52,783 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 08:00:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:53,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:53,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:53,910 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 08:00:53,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:53,961 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 08:00:53,962 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:53,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890859958] [2024-11-01 08:00:53,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1890859958] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:53,962 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:53,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:53,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030735101] [2024-11-01 08:00:53,962 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:53,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:53,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:53,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:53,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:53,964 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 08:00:54,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:54,042 INFO L93 Difference]: Finished difference Result 115 states and 140 transitions. [2024-11-01 08:00:54,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:54,048 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 08:00:54,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:54,050 INFO L225 Difference]: With dead ends: 115 [2024-11-01 08:00:54,050 INFO L226 Difference]: Without dead ends: 84 [2024-11-01 08:00:54,050 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 08:00:54,051 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, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:54,051 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 08:00:54,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-01 08:00:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-01 08:00:54,069 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 08:00:54,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2024-11-01 08:00:54,070 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 112 [2024-11-01 08:00:54,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:54,071 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2024-11-01 08:00:54,071 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 08:00:54,071 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2024-11-01 08:00:54,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-01 08:00:54,074 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:54,074 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 08:00:54,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2024-11-01 08:00:54,274 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 08:00:54,275 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:54,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:54,275 INFO L85 PathProgramCache]: Analyzing trace with hash -830156913, now seen corresponding path program 1 times [2024-11-01 08:00:54,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:54,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065281205] [2024-11-01 08:00:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:54,276 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:54,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:54,279 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 08:00:54,280 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 08:00:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:55,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:00:55,392 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:55,418 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 08:00:55,418 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:55,475 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 08:00:55,476 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:55,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065281205] [2024-11-01 08:00:55,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2065281205] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:00:55,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:00:55,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:00:55,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867869568] [2024-11-01 08:00:55,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:00:55,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:00:55,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:55,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:00:55,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:00:55,478 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 08:00:55,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:55,595 INFO L93 Difference]: Finished difference Result 126 states and 153 transitions. [2024-11-01 08:00:55,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-01 08:00:55,599 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 08:00:55,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:55,600 INFO L225 Difference]: With dead ends: 126 [2024-11-01 08:00:55,600 INFO L226 Difference]: Without dead ends: 92 [2024-11-01 08:00:55,601 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 08:00:55,601 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 08:00:55,601 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 08:00:55,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-01 08:00:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-01 08:00:55,617 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 08:00:55,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2024-11-01 08:00:55,618 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 116 [2024-11-01 08:00:55,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:55,619 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2024-11-01 08:00:55,619 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 08:00:55,619 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2024-11-01 08:00:55,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-01 08:00:55,620 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:55,620 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 08:00:55,636 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 08:00:55,821 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 08:00:55,821 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:55,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:55,822 INFO L85 PathProgramCache]: Analyzing trace with hash 518049927, now seen corresponding path program 2 times [2024-11-01 08:00:55,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:55,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149242746] [2024-11-01 08:00:55,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:55,822 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:55,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:55,824 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 08:00:55,825 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 08:00:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:57,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-01 08:00:57,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:57,112 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 08:00:57,112 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:57,254 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 08:00:57,255 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:57,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149242746] [2024-11-01 08:00:57,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1149242746] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:00:57,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:00:57,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-01 08:00:57,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462700310] [2024-11-01 08:00:57,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:00:57,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-01 08:00:57,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:57,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-01 08:00:57,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-11-01 08:00:57,257 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 08:00:57,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:57,463 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2024-11-01 08:00:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-01 08:00:57,468 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 08:00:57,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:57,469 INFO L225 Difference]: With dead ends: 138 [2024-11-01 08:00:57,470 INFO L226 Difference]: Without dead ends: 96 [2024-11-01 08:00:57,470 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 08:00:57,471 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 08:00:57,471 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 08:00:57,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-01 08:00:57,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-11-01 08:00:57,481 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 08:00:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2024-11-01 08:00:57,482 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 124 [2024-11-01 08:00:57,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:57,483 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2024-11-01 08:00:57,483 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 08:00:57,483 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2024-11-01 08:00:57,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-01 08:00:57,484 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:57,484 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 08:00:57,505 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 08:00:57,685 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 08:00:57,685 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:57,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:57,685 INFO L85 PathProgramCache]: Analyzing trace with hash -291789821, now seen corresponding path program 3 times [2024-11-01 08:00:57,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:57,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477597693] [2024-11-01 08:00:57,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:57,686 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:57,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:57,689 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 08:00:57,692 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 08:00:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:59,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 1212 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:59,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:59,119 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 08:00:59,120 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:59,160 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 08:00:59,160 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:59,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477597693] [2024-11-01 08:00:59,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1477597693] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:59,161 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:59,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:59,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346436380] [2024-11-01 08:00:59,161 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:59,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:59,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:59,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:59,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:59,162 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 08:00:59,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:59,204 INFO L93 Difference]: Finished difference Result 145 states and 170 transitions. [2024-11-01 08:00:59,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:59,207 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 08:00:59,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:59,208 INFO L225 Difference]: With dead ends: 145 [2024-11-01 08:00:59,208 INFO L226 Difference]: Without dead ends: 99 [2024-11-01 08:00:59,209 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 08:00:59,209 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 08:00:59,209 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 08:00:59,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-01 08:00:59,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-11-01 08:00:59,229 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 08:00:59,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2024-11-01 08:00:59,234 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 128 [2024-11-01 08:00:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:59,234 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2024-11-01 08:00:59,235 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 08:00:59,235 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2024-11-01 08:00:59,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-01 08:00:59,236 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:59,236 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 08:00:59,259 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 08:00:59,436 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 08:00:59,437 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:59,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:59,437 INFO L85 PathProgramCache]: Analyzing trace with hash -297563905, now seen corresponding path program 1 times [2024-11-01 08:00:59,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:59,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215733061] [2024-11-01 08:00:59,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:59,438 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:59,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:59,439 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 08:00:59,440 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 08:01:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:00,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:00,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:00,786 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 08:01:00,787 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:00,838 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 08:01:00,838 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:00,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215733061] [2024-11-01 08:01:00,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1215733061] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:00,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:00,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:00,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394817848] [2024-11-01 08:01:00,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:00,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:00,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:00,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:00,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:00,840 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 08:01:00,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:00,961 INFO L93 Difference]: Finished difference Result 156 states and 183 transitions. [2024-11-01 08:01:00,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-01 08:01:00,963 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 08:01:00,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:00,964 INFO L225 Difference]: With dead ends: 156 [2024-11-01 08:01:00,964 INFO L226 Difference]: Without dead ends: 107 [2024-11-01 08:01:00,964 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 08:01:00,965 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 08:01:00,965 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 08:01:00,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-01 08:01:00,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2024-11-01 08:01:00,980 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 08:01:00,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2024-11-01 08:01:00,982 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 132 [2024-11-01 08:01:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:00,983 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2024-11-01 08:01:00,983 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 08:01:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2024-11-01 08:01:00,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-01 08:01:00,984 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:00,984 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 08:01:01,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:01,185 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 08:01:01,185 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:01,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:01,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1407600393, now seen corresponding path program 2 times [2024-11-01 08:01:01,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:01,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132224425] [2024-11-01 08:01:01,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:01,186 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:01,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:01,187 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 08:01:01,188 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 08:01:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:02,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-01 08:01:02,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:02,699 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 08:01:02,699 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:02,845 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 08:01:02,845 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:02,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132224425] [2024-11-01 08:01:02,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1132224425] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:02,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:02,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-01 08:01:02,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404286429] [2024-11-01 08:01:02,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:02,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-01 08:01:02,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:02,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-01 08:01:02,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-11-01 08:01:02,848 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 08:01:03,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:03,057 INFO L93 Difference]: Finished difference Result 168 states and 193 transitions. [2024-11-01 08:01:03,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-01 08:01:03,058 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 08:01:03,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:03,059 INFO L225 Difference]: With dead ends: 168 [2024-11-01 08:01:03,060 INFO L226 Difference]: Without dead ends: 111 [2024-11-01 08:01:03,060 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 08:01:03,061 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 08:01:03,061 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 08:01:03,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-01 08:01:03,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-11-01 08:01:03,070 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 08:01:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 126 transitions. [2024-11-01 08:01:03,072 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 126 transitions. Word has length 140 [2024-11-01 08:01:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:03,072 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 126 transitions. [2024-11-01 08:01:03,072 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 08:01:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 126 transitions. [2024-11-01 08:01:03,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-01 08:01:03,074 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:03,074 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 08:01:03,096 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 08:01:03,275 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 08:01:03,275 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:03,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:03,276 INFO L85 PathProgramCache]: Analyzing trace with hash -469367821, now seen corresponding path program 3 times [2024-11-01 08:01:03,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:03,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954678834] [2024-11-01 08:01:03,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:03,276 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:03,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:03,296 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 08:01:03,297 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 08:01:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:04,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 1260 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:04,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:04,708 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 08:01:04,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:04,748 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 08:01:04,748 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:04,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954678834] [2024-11-01 08:01:04,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1954678834] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:04,748 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:04,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:04,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537893433] [2024-11-01 08:01:04,749 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:04,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:04,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:04,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:04,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:04,750 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 08:01:04,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:04,781 INFO L93 Difference]: Finished difference Result 175 states and 200 transitions. [2024-11-01 08:01:04,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:04,781 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 08:01:04,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:04,783 INFO L225 Difference]: With dead ends: 175 [2024-11-01 08:01:04,783 INFO L226 Difference]: Without dead ends: 114 [2024-11-01 08:01:04,783 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 08:01:04,784 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 08:01:04,784 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 08:01:04,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-01 08:01:04,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-11-01 08:01:04,793 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 08:01:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 129 transitions. [2024-11-01 08:01:04,794 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 129 transitions. Word has length 144 [2024-11-01 08:01:04,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:04,794 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 129 transitions. [2024-11-01 08:01:04,794 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 08:01:04,794 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 129 transitions. [2024-11-01 08:01:04,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-01 08:01:04,796 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:04,796 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 08:01:04,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:04,996 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 08:01:04,996 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:04,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:04,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1956806545, now seen corresponding path program 1 times [2024-11-01 08:01:04,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:04,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611968359] [2024-11-01 08:01:04,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:04,997 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:04,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:04,998 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 08:01:04,999 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 08:01:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:06,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:06,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:06,564 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 08:01:06,564 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:06,632 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 08:01:06,633 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:06,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611968359] [2024-11-01 08:01:06,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1611968359] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:06,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:06,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:06,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991536464] [2024-11-01 08:01:06,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:06,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:06,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:06,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:06,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:06,635 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 08:01:06,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:06,701 INFO L93 Difference]: Finished difference Result 186 states and 213 transitions. [2024-11-01 08:01:06,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-01 08:01:06,702 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 08:01:06,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:06,704 INFO L225 Difference]: With dead ends: 186 [2024-11-01 08:01:06,704 INFO L226 Difference]: Without dead ends: 122 [2024-11-01 08:01:06,704 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 08:01:06,704 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, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:06,705 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 176 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:06,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-01 08:01:06,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2024-11-01 08:01:06,714 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 08:01:06,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 137 transitions. [2024-11-01 08:01:06,715 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 137 transitions. Word has length 148 [2024-11-01 08:01:06,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:06,715 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 137 transitions. [2024-11-01 08:01:06,715 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 08:01:06,715 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 137 transitions. [2024-11-01 08:01:06,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-01 08:01:06,716 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:06,717 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 08:01:06,738 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 08:01:06,917 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 08:01:06,917 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:06,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:06,918 INFO L85 PathProgramCache]: Analyzing trace with hash -525623449, now seen corresponding path program 2 times [2024-11-01 08:01:06,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:06,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144555244] [2024-11-01 08:01:06,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:06,918 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:06,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:06,920 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 08:01:06,921 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 08:01:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:08,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 1296 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-01 08:01:08,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:08,579 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 08:01:08,579 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:08,743 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 08:01:08,743 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:08,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144555244] [2024-11-01 08:01:08,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1144555244] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:08,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:08,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-01 08:01:08,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98119830] [2024-11-01 08:01:08,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:08,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-01 08:01:08,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:08,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-01 08:01:08,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-11-01 08:01:08,748 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 08:01:08,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:08,910 INFO L93 Difference]: Finished difference Result 198 states and 223 transitions. [2024-11-01 08:01:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-01 08:01:08,911 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 08:01:08,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:08,913 INFO L225 Difference]: With dead ends: 198 [2024-11-01 08:01:08,913 INFO L226 Difference]: Without dead ends: 126 [2024-11-01 08:01:08,913 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 08:01:08,914 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 08:01:08,914 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 08:01:08,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-01 08:01:08,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-11-01 08:01:08,924 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 08:01:08,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 141 transitions. [2024-11-01 08:01:08,926 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 141 transitions. Word has length 156 [2024-11-01 08:01:08,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:08,926 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 141 transitions. [2024-11-01 08:01:08,926 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 08:01:08,927 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 141 transitions. [2024-11-01 08:01:08,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-01 08:01:08,928 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:08,928 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 08:01:08,954 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 08:01:09,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:09,129 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:09,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:09,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1008746979, now seen corresponding path program 3 times [2024-11-01 08:01:09,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:09,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252906944] [2024-11-01 08:01:09,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:09,130 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:09,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:09,131 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 08:01:09,132 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 08:01:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:10,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:10,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:10,818 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 08:01:10,818 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:10,857 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 08:01:10,858 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:10,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252906944] [2024-11-01 08:01:10,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [252906944] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:10,858 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:10,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:10,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377536357] [2024-11-01 08:01:10,858 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:10,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:10,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:10,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:10,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:10,859 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 08:01:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:10,883 INFO L93 Difference]: Finished difference Result 205 states and 230 transitions. [2024-11-01 08:01:10,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:10,883 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 08:01:10,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:10,885 INFO L225 Difference]: With dead ends: 205 [2024-11-01 08:01:10,885 INFO L226 Difference]: Without dead ends: 129 [2024-11-01 08:01:10,885 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 08:01:10,886 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 08:01:10,886 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 08:01:10,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-01 08:01:10,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2024-11-01 08:01:10,895 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 08:01:10,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2024-11-01 08:01:10,896 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 160 [2024-11-01 08:01:10,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:10,897 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2024-11-01 08:01:10,897 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 08:01:10,897 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2024-11-01 08:01:10,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-11-01 08:01:10,899 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:10,899 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 08:01:10,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:11,100 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 08:01:11,100 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:11,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:11,100 INFO L85 PathProgramCache]: Analyzing trace with hash 134624735, now seen corresponding path program 1 times [2024-11-01 08:01:11,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:11,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083382311] [2024-11-01 08:01:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:11,101 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:11,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:11,102 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 08:01:11,104 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 08:01:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:12,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:12,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:12,767 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 08:01:12,767 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:12,830 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 08:01:12,830 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:12,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083382311] [2024-11-01 08:01:12,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2083382311] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:12,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:12,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:12,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089401781] [2024-11-01 08:01:12,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:12,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:12,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:12,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:12,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:12,832 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 08:01:12,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:12,907 INFO L93 Difference]: Finished difference Result 216 states and 243 transitions. [2024-11-01 08:01:12,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-01 08:01:12,908 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 08:01:12,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:12,909 INFO L225 Difference]: With dead ends: 216 [2024-11-01 08:01:12,909 INFO L226 Difference]: Without dead ends: 137 [2024-11-01 08:01:12,910 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 08:01:12,910 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 08:01:12,911 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 08:01:12,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-01 08:01:12,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2024-11-01 08:01:12,920 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 08:01:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 152 transitions. [2024-11-01 08:01:12,941 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 152 transitions. Word has length 164 [2024-11-01 08:01:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:12,941 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 152 transitions. [2024-11-01 08:01:12,941 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 08:01:12,942 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 152 transitions. [2024-11-01 08:01:12,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-11-01 08:01:12,945 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:12,945 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 08:01:12,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2024-11-01 08:01:13,146 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 08:01:13,146 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:13,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:13,147 INFO L85 PathProgramCache]: Analyzing trace with hash -952499241, now seen corresponding path program 2 times [2024-11-01 08:01:13,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:13,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164857709] [2024-11-01 08:01:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:13,148 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:13,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:13,149 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 08:01:13,150 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 08:01:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:14,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-01 08:01:14,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:15,052 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 08:01:15,052 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:15,165 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 08:01:15,165 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:15,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164857709] [2024-11-01 08:01:15,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1164857709] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:15,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:15,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-01 08:01:15,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294879763] [2024-11-01 08:01:15,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:15,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-01 08:01:15,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:15,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-01 08:01:15,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-11-01 08:01:15,167 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 08:01:15,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:15,293 INFO L93 Difference]: Finished difference Result 228 states and 253 transitions. [2024-11-01 08:01:15,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-01 08:01:15,294 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 08:01:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:15,296 INFO L225 Difference]: With dead ends: 228 [2024-11-01 08:01:15,296 INFO L226 Difference]: Without dead ends: 141 [2024-11-01 08:01:15,296 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 08:01:15,297 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 08:01:15,297 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 08:01:15,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-01 08:01:15,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2024-11-01 08:01:15,307 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 08:01:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2024-11-01 08:01:15,308 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 172 [2024-11-01 08:01:15,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:15,309 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2024-11-01 08:01:15,309 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 08:01:15,309 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2024-11-01 08:01:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2024-11-01 08:01:15,310 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:15,310 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 08:01:15,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:15,511 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 08:01:15,511 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:15,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:15,512 INFO L85 PathProgramCache]: Analyzing trace with hash 197516755, now seen corresponding path program 3 times [2024-11-01 08:01:15,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:15,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563025773] [2024-11-01 08:01:15,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:15,512 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:15,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:15,514 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 08:01:15,515 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 08:01:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:17,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 1356 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-01 08:01:17,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:18,617 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 08:01:18,617 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:20,933 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 08:01:20,933 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:20,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563025773] [2024-11-01 08:01:20,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [563025773] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:20,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:20,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2024-11-01 08:01:20,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657953649] [2024-11-01 08:01:20,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:20,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-01 08:01:20,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:20,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-01 08:01:20,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2024-11-01 08:01:20,936 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 08:01:21,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:21,797 INFO L93 Difference]: Finished difference Result 265 states and 291 transitions. [2024-11-01 08:01:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-01 08:01:21,797 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 08:01:21,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:21,799 INFO L225 Difference]: With dead ends: 265 [2024-11-01 08:01:21,799 INFO L226 Difference]: Without dead ends: 263 [2024-11-01 08:01:21,800 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2024-11-01 08:01:21,800 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 153 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:21,800 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 426 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-01 08:01:21,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-11-01 08:01:21,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 226. [2024-11-01 08:01:21,818 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 08:01:21,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 250 transitions. [2024-11-01 08:01:21,820 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 250 transitions. Word has length 176 [2024-11-01 08:01:21,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:21,820 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 250 transitions. [2024-11-01 08:01:21,820 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 08:01:21,821 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 250 transitions. [2024-11-01 08:01:21,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2024-11-01 08:01:21,822 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:21,822 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 08:01:21,870 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 08:01:22,022 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 08:01:22,023 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:22,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:22,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1897711676, now seen corresponding path program 4 times [2024-11-01 08:01:22,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:22,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986423472] [2024-11-01 08:01:22,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:22,024 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:22,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:22,025 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 08:01:22,026 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 08:01:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:26,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 2266 conjuncts, 215 conjuncts are in the unsatisfiable core [2024-11-01 08:01:26,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:34,463 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 08:01:34,464 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:40,406 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse11 (= (_ bv0 8) |c_ULTIMATE.start_main_~input_9~0#1|)) (.cse1 ((_ zero_extend 24) |c_ULTIMATE.start_main_~mask_SORT_1~0#1|)) (.cse10 ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_83~0#1|)) (.cse4 ((_ zero_extend 24) |c_ULTIMATE.start_main_~mask_SORT_15~0#1|))) (let ((.cse9 (bvsge ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_55~0#1|) ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse4 ((_ zero_extend 24) |c_ULTIMATE.start_main_~var_27~0#1|)))))) (.cse0 (forall ((|v_ULTIMATE.start_main_~var_105_arg_1~0#1_62| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_89_arg_1~0#1_62| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_113_arg_0~0#1_63| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_86_arg_1~0#1_62| (_ BitVec 8))) (= (_ bv0 8) ((_ extract 7 0) (bvand .cse1 ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvand (_ bv254 32) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse10 ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_86_arg_1~0#1_62|)))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_89_arg_1~0#1_62|)))))))))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_105_arg_1~0#1_62|))))))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_113_arg_0~0#1_63|))))))))) (.cse6 (or .cse11 (forall ((|v_ULTIMATE.start_main_~var_98_arg_1~0#1_62| (_ BitVec 8))) (= ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_98_arg_1~0#1_62|))) .cse4))) (_ bv0 32))))) (.cse8 (forall ((|v_ULTIMATE.start_main_~var_105_arg_1~0#1_62| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_89_arg_1~0#1_62| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_113_arg_0~0#1_63| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_86_arg_1~0#1_62| (_ BitVec 8))) (= (_ bv0 8) ((_ extract 7 0) (bvand .cse1 ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvor ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_105_arg_1~0#1_62|) ((_ zero_extend 24) ((_ extract 7 0) (bvnot ((_ zero_extend 24) ((_ extract 7 0) (bvand (_ bv255 32) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse10 ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_86_arg_1~0#1_62|)))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_89_arg_1~0#1_62|)))))))))))))))) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_113_arg_0~0#1_63|))))))))) (.cse7 (or .cse11 (forall ((|v_ULTIMATE.start_main_~var_98_arg_1~0#1_62| (_ BitVec 8))) (not (= ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_98_arg_1~0#1_62|))) .cse4))) (_ bv0 32)))))) (.cse5 (not .cse11)) (.cse2 ((_ zero_extend 24) ((_ extract 7 0) (bvnot .cse10)))) (.cse3 ((_ zero_extend 24) |c_ULTIMATE.start_main_~state_87~0#1|))) (and (or (and (or .cse0 (and (or (forall ((|v_ULTIMATE.start_main_~var_92_arg_0~0#1_62| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_60_arg_1~0#1_62| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_58_arg_0~0#1_62| (_ BitVec 8))) (= (_ bv0 32) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvadd ((_ zero_extend 24) ((_ extract 7 0) (bvadd ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse1 ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_92_arg_0~0#1_62|) .cse2)))))) .cse3))) (bvneg ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse1 ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse1 ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_60_arg_1~0#1_62|) ((_ zero_extend 24) ((_ extract 7 0) (bvand (_ bv1 32) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_58_arg_0~0#1_62|))))))))))))))))))) .cse4))))) .cse5) .cse6)) (or (and (or .cse5 (forall ((|v_ULTIMATE.start_main_~var_92_arg_0~0#1_62| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_60_arg_1~0#1_62| (_ BitVec 8)) (|v_ULTIMATE.start_main_~var_58_arg_0~0#1_62| (_ BitVec 8))) (not (= (_ bv0 32) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvadd ((_ zero_extend 24) ((_ extract 7 0) (bvadd ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse1 ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_92_arg_0~0#1_62|) .cse2)))))) .cse3))) (bvneg ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse1 ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse1 ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_60_arg_1~0#1_62|) ((_ zero_extend 24) ((_ extract 7 0) (bvand (_ bv1 32) ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_58_arg_0~0#1_62|))))))))))))))))))) .cse4))))))) .cse7) .cse8)) (not .cse9)) (or .cse9 (and (or .cse0 (and (or .cse5 (forall ((|v_ULTIMATE.start_main_~var_92_arg_0~0#1_62| (_ BitVec 8))) (= (_ bv0 32) ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse4 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvadd ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse1 ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_92_arg_0~0#1_62|) .cse2)))))) .cse3))))))))))))) .cse6)) (or .cse8 (and .cse7 (or .cse5 (forall ((|v_ULTIMATE.start_main_~var_92_arg_0~0#1_62| (_ BitVec 8))) (not (= (_ bv0 32) ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse4 ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) (bvadd ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse1 ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) |v_ULTIMATE.start_main_~var_92_arg_0~0#1_62|) .cse2)))))) .cse3))))))))))))))))))))) is different from false [2024-11-01 08:01:54,918 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 08:01:54,919 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 08:01:54,920 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:54,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986423472] [2024-11-01 08:01:54,920 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-01 08:01:54,961 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 08:01:55,120 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 08:01:55,121 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.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:86) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:912) 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) ... 45 more [2024-11-01 08:01:55,125 INFO L158 Benchmark]: Toolchain (without parser) took 74212.98ms. Allocated memory was 200.3MB in the beginning and 995.1MB in the end (delta: 794.8MB). Free memory was 174.5MB in the beginning and 492.2MB in the end (delta: -317.7MB). Peak memory consumption was 477.6MB. Max. memory is 8.0GB. [2024-11-01 08:01:55,126 INFO L158 Benchmark]: CDTParser took 1.79ms. Allocated memory is still 200.3MB. Free memory is still 177.5MB. There was no memory consumed. Max. memory is 8.0GB. [2024-11-01 08:01:55,126 INFO L158 Benchmark]: CACSL2BoogieTranslator took 690.33ms. Allocated memory is still 200.3MB. Free memory was 174.0MB in the beginning and 137.2MB in the end (delta: 36.8MB). Peak memory consumption was 36.7MB. Max. memory is 8.0GB. [2024-11-01 08:01:55,126 INFO L158 Benchmark]: Boogie Procedure Inliner took 124.37ms. Allocated memory is still 200.3MB. Free memory was 137.2MB in the beginning and 129.9MB in the end (delta: 7.3MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2024-11-01 08:01:55,126 INFO L158 Benchmark]: Boogie Preprocessor took 161.96ms. Allocated memory is still 200.3MB. Free memory was 129.4MB in the beginning and 120.5MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2024-11-01 08:01:55,127 INFO L158 Benchmark]: RCFGBuilder took 1212.57ms. Allocated memory was 200.3MB in the beginning and 247.5MB in the end (delta: 47.2MB). Free memory was 120.5MB in the beginning and 123.6MB in the end (delta: -3.2MB). Peak memory consumption was 44.0MB. Max. memory is 8.0GB. [2024-11-01 08:01:55,127 INFO L158 Benchmark]: TraceAbstraction took 72017.29ms. Allocated memory was 247.5MB in the beginning and 995.1MB in the end (delta: 747.6MB). Free memory was 122.6MB in the beginning and 492.2MB in the end (delta: -369.6MB). Peak memory consumption was 379.1MB. Max. memory is 8.0GB. [2024-11-01 08:01:55,131 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.79ms. Allocated memory is still 200.3MB. Free memory is still 177.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 690.33ms. Allocated memory is still 200.3MB. Free memory was 174.0MB in the beginning and 137.2MB in the end (delta: 36.8MB). Peak memory consumption was 36.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 124.37ms. Allocated memory is still 200.3MB. Free memory was 137.2MB in the beginning and 129.9MB in the end (delta: 7.3MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 161.96ms. Allocated memory is still 200.3MB. Free memory was 129.4MB in the beginning and 120.5MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * RCFGBuilder took 1212.57ms. Allocated memory was 200.3MB in the beginning and 247.5MB in the end (delta: 47.2MB). Free memory was 120.5MB in the beginning and 123.6MB in the end (delta: -3.2MB). Peak memory consumption was 44.0MB. Max. memory is 8.0GB. * TraceAbstraction took 72017.29ms. Allocated memory was 247.5MB in the beginning and 995.1MB in the end (delta: 747.6MB). Free memory was 122.6MB in the beginning and 492.2MB in the end (delta: -369.6MB). Peak memory consumption was 379.1MB. 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...