/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'cvc4 --incremental --print-success --lang smt' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-11-01 08:00:38,621 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-01 08:00:38,713 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 08:00:38,724 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-01 08:00:38,725 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-01 08:00:38,787 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-01 08:00:38,790 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-01 08:00:38,790 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-01 08:00:38,791 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-01 08:00:38,791 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-01 08:00:38,792 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-01 08:00:38,792 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-01 08:00:38,793 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-01 08:00:38,797 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-01 08:00:38,797 INFO L153 SettingsManager]: * Use SBE=true [2024-11-01 08:00:38,798 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-01 08:00:38,798 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-01 08:00:38,798 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-01 08:00:38,798 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-01 08:00:38,799 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-01 08:00:38,799 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-01 08:00:38,802 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-01 08:00:38,802 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-01 08:00:38,802 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-01 08:00:38,802 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-01 08:00:38,803 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-01 08:00:38,803 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-01 08:00:38,803 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-01 08:00:38,803 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-01 08:00:38,804 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-01 08:00:38,804 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-01 08:00:38,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-01 08:00:38,805 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-01 08:00:38,805 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-01 08:00:38,806 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-01 08:00:38,806 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-01 08:00:38,807 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:38,807 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-01 08:00:38,807 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-01 08:00:38,807 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-01 08:00:38,808 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-01 08:00:38,809 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-11-01 08:00:38,809 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:39,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-01 08:00:39,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-01 08:00:39,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-01 08:00:39,190 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-01 08:00:39,190 INFO L274 PluginConnector]: CDTParser initialized [2024-11-01 08:00:39,192 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c [2024-11-01 08:00:40,686 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-01 08:00:41,027 INFO L384 CDTParser]: Found 1 translation units. [2024-11-01 08:00:41,028 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c [2024-11-01 08:00:41,047 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2525406b9/0971be196f4444a4944b4ab2dd134c5e/FLAG14dd621b5 [2024-11-01 08:00:41,060 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2525406b9/0971be196f4444a4944b4ab2dd134c5e [2024-11-01 08:00:41,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-01 08:00:41,063 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-01 08:00:41,064 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-01 08:00:41,065 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-01 08:00:41,069 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-01 08:00:41,070 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 08:00:41" (1/1) ... [2024-11-01 08:00:41,071 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78bff39b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:41, skipping insertion in model container [2024-11-01 08:00:41,071 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 08:00:41" (1/1) ... [2024-11-01 08:00:41,134 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-01 08:00:41,345 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_linked_list_fifo_n2d4.c[1268,1281] [2024-11-01 08:00:41,662 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-01 08:00:41,672 INFO L200 MainTranslator]: Completed pre-run [2024-11-01 08:00:41,683 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_linked_list_fifo_n2d4.c[1268,1281] [2024-11-01 08:00:41,814 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-01 08:00:41,832 INFO L204 MainTranslator]: Completed translation [2024-11-01 08:00:41,837 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:00:41 WrapperNode [2024-11-01 08:00:41,837 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-01 08:00:41,839 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-01 08:00:41,839 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-01 08:00:41,839 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-01 08:00:41,846 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 08:00:41,889 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 08:00:42,006 INFO L138 Inliner]: procedures = 18, calls = 107, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1594 [2024-11-01 08:00:42,007 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-01 08:00:42,008 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-01 08:00:42,008 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-01 08:00:42,008 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-01 08:00:42,019 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 08:00:42,019 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 08:00:42,033 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 08:00:42,111 INFO L175 MemorySlicer]: Split 63 memory accesses to 4 slices as follows [2, 29, 8, 24]. 46 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 30 writes are split as follows [0, 14, 4, 12]. [2024-11-01 08:00:42,112 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 08:00:42,112 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 08:00:42,159 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 08:00:42,172 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 08:00:42,188 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 08:00:42,201 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 08:00:42,224 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-01 08:00:42,226 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-01 08:00:42,226 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-01 08:00:42,227 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-01 08:00:42,227 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 08:00:42,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-01 08:00:42,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-01 08:00:42,258 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 08:00:42,262 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 08:00:42,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-01 08:00:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2024-11-01 08:00:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2024-11-01 08:00:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2024-11-01 08:00:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#3 [2024-11-01 08:00:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-01 08:00:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-01 08:00:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-01 08:00:42,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-11-01 08:00:42,294 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-01 08:00:42,294 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-01 08:00:42,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-01 08:00:42,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-01 08:00:42,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-01 08:00:42,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2024-11-01 08:00:42,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#1 [2024-11-01 08:00:42,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#2 [2024-11-01 08:00:42,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#3 [2024-11-01 08:00:42,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-01 08:00:42,656 INFO L238 CfgBuilder]: Building ICFG [2024-11-01 08:00:42,661 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-01 08:00:43,907 INFO L? ?]: Removed 1019 outVars from TransFormulas that were not future-live. [2024-11-01 08:00:43,908 INFO L287 CfgBuilder]: Performing block encoding [2024-11-01 08:00:43,923 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-01 08:00:43,923 INFO L316 CfgBuilder]: Removed 19 assume(true) statements. [2024-11-01 08:00:43,924 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.11 08:00:43 BoogieIcfgContainer [2024-11-01 08:00:43,924 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-01 08:00:43,927 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-01 08:00:43,927 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-01 08:00:43,931 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-01 08:00:43,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.11 08:00:41" (1/3) ... [2024-11-01 08:00:43,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@325509f 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 08:00:43,933 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 08:00:43,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@325509f 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 08:00:43,933 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 08:00:43,934 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c [2024-11-01 08:00:43,951 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-01 08:00:43,951 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-01 08:00:44,037 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-01 08:00:44,045 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;@32e377fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-01 08:00:44,046 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-01 08:00:44,050 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 70 states have (on average 1.5714285714285714) internal successors, (110), 71 states have internal predecessors, (110), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-01 08:00:44,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-01 08:00:44,057 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:44,057 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:00:44,058 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:44,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:44,062 INFO L85 PathProgramCache]: Analyzing trace with hash -958431594, now seen corresponding path program 1 times [2024-11-01 08:00:44,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:44,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819356399] [2024-11-01 08:00:44,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:44,073 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:44,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:44,076 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 08:00:44,081 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 08:00:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:44,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-01 08:00:44,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:44,871 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 08:00:44,872 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:44,915 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 08:00:44,918 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:44,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819356399] [2024-11-01 08:00:44,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1819356399] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:44,919 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:44,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-11-01 08:00:44,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792591103] [2024-11-01 08:00:44,921 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:44,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-01 08:00:44,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:44,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-01 08:00:44,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-01 08:00:44,952 INFO L87 Difference]: Start difference. First operand has 78 states, 70 states have (on average 1.5714285714285714) internal successors, (110), 71 states have internal predecessors, (110), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-01 08:00:44,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:44,984 INFO L93 Difference]: Finished difference Result 149 states and 237 transitions. [2024-11-01 08:00:44,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-01 08:00:44,986 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2024-11-01 08:00:44,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:44,993 INFO L225 Difference]: With dead ends: 149 [2024-11-01 08:00:44,994 INFO L226 Difference]: Without dead ends: 75 [2024-11-01 08:00:44,997 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-01 08:00:45,000 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:45,001 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:45,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-01 08:00:45,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-11-01 08:00:45,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 68 states have internal predecessors, (87), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-01 08:00:45,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2024-11-01 08:00:45,048 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 41 [2024-11-01 08:00:45,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:45,048 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2024-11-01 08:00:45,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-01 08:00:45,049 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2024-11-01 08:00:45,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-01 08:00:45,051 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:45,052 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:00:45,061 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 08:00:45,254 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 08:00:45,255 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:45,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:45,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2099855424, now seen corresponding path program 1 times [2024-11-01 08:00:45,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:45,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670458443] [2024-11-01 08:00:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:45,256 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:45,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:45,259 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 08:00:45,261 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 08:00:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:46,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:46,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:46,056 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 08:00:46,057 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:46,097 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 08:00:46,097 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:46,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670458443] [2024-11-01 08:00:46,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [670458443] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:46,098 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:46,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:46,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637375972] [2024-11-01 08:00:46,098 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:46,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:46,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:46,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:46,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:46,101 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-01 08:00:46,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:46,135 INFO L93 Difference]: Finished difference Result 149 states and 194 transitions. [2024-11-01 08:00:46,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:46,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 41 [2024-11-01 08:00:46,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:46,138 INFO L225 Difference]: With dead ends: 149 [2024-11-01 08:00:46,138 INFO L226 Difference]: Without dead ends: 78 [2024-11-01 08:00:46,139 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:46,140 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:46,140 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 279 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:46,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-01 08:00:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-01 08:00:46,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 states have internal predecessors, (90), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-01 08:00:46,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2024-11-01 08:00:46,151 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 41 [2024-11-01 08:00:46,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:46,151 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2024-11-01 08:00:46,151 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 08:00:46,151 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2024-11-01 08:00:46,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-01 08:00:46,152 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:46,153 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:00:46,161 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 08:00:46,353 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 08:00:46,354 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:46,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:46,354 INFO L85 PathProgramCache]: Analyzing trace with hash 963432764, now seen corresponding path program 1 times [2024-11-01 08:00:46,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:46,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479421545] [2024-11-01 08:00:46,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:46,355 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:46,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:46,360 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 08:00:46,362 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 08:00:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:47,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:00:47,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:47,207 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 08:00:47,207 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:47,277 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 08:00:47,277 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:47,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479421545] [2024-11-01 08:00:47,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [479421545] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:00:47,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:00:47,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:00:47,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963717888] [2024-11-01 08:00:47,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:00:47,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:00:47,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:47,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:00:47,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:00:47,280 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-01 08:00:47,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:47,367 INFO L93 Difference]: Finished difference Result 153 states and 198 transitions. [2024-11-01 08:00:47,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:00:47,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 45 [2024-11-01 08:00:47,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:47,373 INFO L225 Difference]: With dead ends: 153 [2024-11-01 08:00:47,373 INFO L226 Difference]: Without dead ends: 82 [2024-11-01 08:00:47,374 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:00:47,377 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:47,377 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 463 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:00:47,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-01 08:00:47,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-11-01 08:00:47,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 75 states have internal predecessors, (94), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-01 08:00:47,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2024-11-01 08:00:47,391 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 45 [2024-11-01 08:00:47,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:47,391 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2024-11-01 08:00:47,392 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 08:00:47,392 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2024-11-01 08:00:47,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-01 08:00:47,393 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:47,396 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:00:47,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2024-11-01 08:00:47,596 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 08:00:47,597 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:47,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:47,598 INFO L85 PathProgramCache]: Analyzing trace with hash 390562872, now seen corresponding path program 2 times [2024-11-01 08:00:47,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:47,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861711929] [2024-11-01 08:00:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:47,598 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:47,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:47,600 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 08:00:47,601 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 08:00:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:48,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:48,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-01 08:00:48,399 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-01 08:00:48,438 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:48,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861711929] [2024-11-01 08:00:48,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1861711929] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:48,439 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:48,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:48,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011015287] [2024-11-01 08:00:48,440 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:48,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:48,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:48,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:48,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:48,445 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-01 08:00:48,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:48,506 INFO L93 Difference]: Finished difference Result 153 states and 197 transitions. [2024-11-01 08:00:48,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:48,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 49 [2024-11-01 08:00:48,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:48,509 INFO L225 Difference]: With dead ends: 153 [2024-11-01 08:00:48,509 INFO L226 Difference]: Without dead ends: 85 [2024-11-01 08:00:48,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:48,513 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:48,514 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:48,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-01 08:00:48,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-11-01 08:00:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 78 states have internal predecessors, (97), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-01 08:00:48,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2024-11-01 08:00:48,522 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 49 [2024-11-01 08:00:48,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:48,522 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2024-11-01 08:00:48,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-01 08:00:48,522 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2024-11-01 08:00:48,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-01 08:00:48,524 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:48,524 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:00:48,533 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 08:00:48,724 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 08:00:48,725 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:48,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:48,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1998153908, now seen corresponding path program 1 times [2024-11-01 08:00:48,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:48,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701238365] [2024-11-01 08:00:48,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:48,726 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:48,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:48,727 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 08:00:48,729 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 08:00:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:49,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:49,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-01 08:00:49,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-01 08:00:49,532 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:49,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701238365] [2024-11-01 08:00:49,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [701238365] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:49,532 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:49,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:49,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234153123] [2024-11-01 08:00:49,533 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:49,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:49,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:49,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:49,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:49,534 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-01 08:00:49,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:49,577 INFO L93 Difference]: Finished difference Result 153 states and 196 transitions. [2024-11-01 08:00:49,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:49,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 53 [2024-11-01 08:00:49,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:49,580 INFO L225 Difference]: With dead ends: 153 [2024-11-01 08:00:49,580 INFO L226 Difference]: Without dead ends: 88 [2024-11-01 08:00:49,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:49,581 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:49,581 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:49,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-01 08:00:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-11-01 08:00:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 81 states have internal predecessors, (100), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-01 08:00:49,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 110 transitions. [2024-11-01 08:00:49,594 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 110 transitions. Word has length 53 [2024-11-01 08:00:49,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:49,595 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 110 transitions. [2024-11-01 08:00:49,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-01 08:00:49,595 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 110 transitions. [2024-11-01 08:00:49,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-01 08:00:49,596 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:49,598 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:00:49,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2024-11-01 08:00:49,799 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 08:00:49,800 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:49,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:49,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1928044208, now seen corresponding path program 1 times [2024-11-01 08:00:49,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:49,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305456037] [2024-11-01 08:00:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:49,801 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:49,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:49,802 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 08:00:49,803 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 08:00:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:50,606 INFO L255 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:00:50,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-01 08:00:50,635 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-01 08:00:50,685 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:50,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305456037] [2024-11-01 08:00:50,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [305456037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:00:50,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:00:50,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:00:50,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012854250] [2024-11-01 08:00:50,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:00:50,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:00:50,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:50,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:00:50,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:00:50,687 INFO L87 Difference]: Start difference. First operand 88 states and 110 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-01 08:00:50,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:50,764 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2024-11-01 08:00:50,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:00:50,768 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 57 [2024-11-01 08:00:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:50,769 INFO L225 Difference]: With dead ends: 157 [2024-11-01 08:00:50,769 INFO L226 Difference]: Without dead ends: 92 [2024-11-01 08:00:50,770 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:00:50,770 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:50,770 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 641 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:00:50,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-01 08:00:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-01 08:00:50,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 85 states have (on average 1.223529411764706) internal successors, (104), 85 states have internal predecessors, (104), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-01 08:00:50,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2024-11-01 08:00:50,777 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 57 [2024-11-01 08:00:50,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:50,778 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2024-11-01 08:00:50,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-01 08:00:50,778 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2024-11-01 08:00:50,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-01 08:00:50,779 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:50,779 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:00:50,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2024-11-01 08:00:50,979 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 08:00:50,980 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:50,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:50,980 INFO L85 PathProgramCache]: Analyzing trace with hash 779777708, now seen corresponding path program 2 times [2024-11-01 08:00:50,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:50,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247777336] [2024-11-01 08:00:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:50,981 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:50,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:50,983 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 08:00:50,984 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 08:00:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:51,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-01 08:00:51,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-01 08:00:52,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-01 08:00:52,839 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:52,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247777336] [2024-11-01 08:00:52,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1247777336] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:52,840 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:52,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2024-11-01 08:00:52,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041818711] [2024-11-01 08:00:52,840 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:52,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:00:52,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:52,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:00:52,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:00:52,842 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-01 08:00:53,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:53,184 INFO L93 Difference]: Finished difference Result 106 states and 133 transitions. [2024-11-01 08:00:53,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-01 08:00:53,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 61 [2024-11-01 08:00:53,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:53,186 INFO L225 Difference]: With dead ends: 106 [2024-11-01 08:00:53,186 INFO L226 Difference]: Without dead ends: 104 [2024-11-01 08:00:53,187 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-01 08:00:53,187 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 156 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:53,188 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 413 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-01 08:00:53,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-01 08:00:53,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2024-11-01 08:00:53,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 92 states have (on average 1.2065217391304348) internal successors, (111), 92 states have internal predecessors, (111), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:00:53,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 131 transitions. [2024-11-01 08:00:53,199 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 131 transitions. Word has length 61 [2024-11-01 08:00:53,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:53,201 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 131 transitions. [2024-11-01 08:00:53,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-01 08:00:53,201 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 131 transitions. [2024-11-01 08:00:53,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-01 08:00:53,202 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:53,203 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:00:53,218 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 08:00:53,403 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 08:00:53,404 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:53,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:53,404 INFO L85 PathProgramCache]: Analyzing trace with hash -466492681, now seen corresponding path program 1 times [2024-11-01 08:00:53,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:53,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494170579] [2024-11-01 08:00:53,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:53,405 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:53,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:53,408 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 08:00:53,408 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 08:00:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:55,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 1528 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:55,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-01 08:00:55,114 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2024-11-01 08:00:55,159 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:55,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494170579] [2024-11-01 08:00:55,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1494170579] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:55,159 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:55,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:55,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211893569] [2024-11-01 08:00:55,160 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:55,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:55,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:55,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:55,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:55,161 INFO L87 Difference]: Start difference. First operand 104 states and 131 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:00:55,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:55,201 INFO L93 Difference]: Finished difference Result 171 states and 219 transitions. [2024-11-01 08:00:55,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:55,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 124 [2024-11-01 08:00:55,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:55,204 INFO L225 Difference]: With dead ends: 171 [2024-11-01 08:00:55,204 INFO L226 Difference]: Without dead ends: 107 [2024-11-01 08:00:55,205 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:55,206 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:55,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:55,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-01 08:00:55,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2024-11-01 08:00:55,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 95 states have (on average 1.2) internal successors, (114), 95 states have internal predecessors, (114), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:00:55,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2024-11-01 08:00:55,227 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 124 [2024-11-01 08:00:55,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:55,227 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2024-11-01 08:00:55,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:00:55,228 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2024-11-01 08:00:55,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-01 08:00:55,229 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:55,233 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:00:55,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2024-11-01 08:00:55,434 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 08:00:55,434 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:55,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:55,435 INFO L85 PathProgramCache]: Analyzing trace with hash 57551859, now seen corresponding path program 1 times [2024-11-01 08:00:55,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:55,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203184153] [2024-11-01 08:00:55,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:55,435 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:55,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:55,438 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 08:00:55,439 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 08:00:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:57,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 1540 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:57,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-01 08:00:57,128 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-01 08:00:57,178 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:57,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203184153] [2024-11-01 08:00:57,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1203184153] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:57,179 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:57,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:57,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310056080] [2024-11-01 08:00:57,179 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:57,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:57,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:57,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:57,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:57,181 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:00:57,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:57,233 INFO L93 Difference]: Finished difference Result 177 states and 225 transitions. [2024-11-01 08:00:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:57,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 128 [2024-11-01 08:00:57,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:57,236 INFO L225 Difference]: With dead ends: 177 [2024-11-01 08:00:57,237 INFO L226 Difference]: Without dead ends: 110 [2024-11-01 08:00:57,237 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 08:00:57,238 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:57,238 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-01 08:00:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2024-11-01 08:00:57,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 98 states have internal predecessors, (117), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:00:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 137 transitions. [2024-11-01 08:00:57,254 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 137 transitions. Word has length 128 [2024-11-01 08:00:57,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:57,254 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 137 transitions. [2024-11-01 08:00:57,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:00:57,254 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 137 transitions. [2024-11-01 08:00:57,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-01 08:00:57,256 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:57,256 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:00:57,289 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 08:00:57,457 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 08:00:57,457 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:57,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:57,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1200629359, now seen corresponding path program 1 times [2024-11-01 08:00:57,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:57,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756772077] [2024-11-01 08:00:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:57,458 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:57,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:57,464 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 08:00:57,466 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 08:00:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:00:59,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 1552 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:00:59,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:00:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-11-01 08:00:59,277 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:00:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2024-11-01 08:00:59,324 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:00:59,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756772077] [2024-11-01 08:00:59,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [756772077] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:00:59,324 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:00:59,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:00:59,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475936740] [2024-11-01 08:00:59,324 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:00:59,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:00:59,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:00:59,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:00:59,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:59,326 INFO L87 Difference]: Start difference. First operand 110 states and 137 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:00:59,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:00:59,371 INFO L93 Difference]: Finished difference Result 183 states and 231 transitions. [2024-11-01 08:00:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:00:59,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 132 [2024-11-01 08:00:59,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:00:59,375 INFO L225 Difference]: With dead ends: 183 [2024-11-01 08:00:59,375 INFO L226 Difference]: Without dead ends: 113 [2024-11-01 08:00:59,375 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:00:59,376 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:00:59,376 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:00:59,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-01 08:00:59,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2024-11-01 08:00:59,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 101 states have (on average 1.188118811881188) internal successors, (120), 101 states have internal predecessors, (120), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:00:59,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 140 transitions. [2024-11-01 08:00:59,385 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 140 transitions. Word has length 132 [2024-11-01 08:00:59,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:00:59,385 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 140 transitions. [2024-11-01 08:00:59,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:00:59,385 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 140 transitions. [2024-11-01 08:00:59,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-01 08:00:59,387 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:00:59,387 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:00:59,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2024-11-01 08:00:59,587 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 08:00:59,587 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:00:59,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:00:59,588 INFO L85 PathProgramCache]: Analyzing trace with hash 197194347, now seen corresponding path program 1 times [2024-11-01 08:00:59,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:00:59,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021639246] [2024-11-01 08:00:59,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:00:59,588 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:00:59,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:00:59,589 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 08:00:59,590 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 08:01:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:01,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 1564 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:01,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-11-01 08:01:01,554 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-11-01 08:01:01,601 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:01,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021639246] [2024-11-01 08:01:01,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2021639246] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:01,601 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:01,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:01,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551414452] [2024-11-01 08:01:01,601 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:01,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:01,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:01,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:01,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:01,603 INFO L87 Difference]: Start difference. First operand 113 states and 140 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:01,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:01,658 INFO L93 Difference]: Finished difference Result 189 states and 237 transitions. [2024-11-01 08:01:01,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:01,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 136 [2024-11-01 08:01:01,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:01,661 INFO L225 Difference]: With dead ends: 189 [2024-11-01 08:01:01,661 INFO L226 Difference]: Without dead ends: 116 [2024-11-01 08:01:01,662 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:01,663 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:01,664 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:01,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-01 08:01:01,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2024-11-01 08:01:01,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 104 states have internal predecessors, (123), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:01,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 143 transitions. [2024-11-01 08:01:01,676 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 143 transitions. Word has length 136 [2024-11-01 08:01:01,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:01,676 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 143 transitions. [2024-11-01 08:01:01,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:01,677 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 143 transitions. [2024-11-01 08:01:01,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-01 08:01:01,678 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:01,678 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:01,716 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 08:01:01,878 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 08:01:01,879 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:01,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:01,879 INFO L85 PathProgramCache]: Analyzing trace with hash -275664921, now seen corresponding path program 1 times [2024-11-01 08:01:01,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:01,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584419723] [2024-11-01 08:01:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:01,880 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:01,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:01,883 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 08:01:01,884 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 08:01:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:03,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 1576 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:03,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2024-11-01 08:01:03,880 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-11-01 08:01:03,932 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:03,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584419723] [2024-11-01 08:01:03,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1584419723] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:03,933 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:03,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:03,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599979223] [2024-11-01 08:01:03,933 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:03,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:03,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:03,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:03,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:03,935 INFO L87 Difference]: Start difference. First operand 116 states and 143 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:03,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:03,994 INFO L93 Difference]: Finished difference Result 195 states and 243 transitions. [2024-11-01 08:01:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:03,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 140 [2024-11-01 08:01:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:03,999 INFO L225 Difference]: With dead ends: 195 [2024-11-01 08:01:03,999 INFO L226 Difference]: Without dead ends: 119 [2024-11-01 08:01:03,999 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:04,000 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:04,000 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:04,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-01 08:01:04,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2024-11-01 08:01:04,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:04,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 146 transitions. [2024-11-01 08:01:04,012 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 146 transitions. Word has length 140 [2024-11-01 08:01:04,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:04,013 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 146 transitions. [2024-11-01 08:01:04,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:04,013 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 146 transitions. [2024-11-01 08:01:04,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-01 08:01:04,014 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:04,015 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:04,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:04,215 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 08:01:04,215 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:04,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:04,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2131001629, now seen corresponding path program 1 times [2024-11-01 08:01:04,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:04,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272268817] [2024-11-01 08:01:04,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:04,217 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:04,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:04,219 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 08:01:04,221 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 08:01:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:06,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:06,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-01 08:01:06,264 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2024-11-01 08:01:06,310 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:06,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272268817] [2024-11-01 08:01:06,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1272268817] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:06,311 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:06,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:06,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712237534] [2024-11-01 08:01:06,311 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:06,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:06,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:06,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:06,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:06,313 INFO L87 Difference]: Start difference. First operand 119 states and 146 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:06,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:06,401 INFO L93 Difference]: Finished difference Result 201 states and 249 transitions. [2024-11-01 08:01:06,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:06,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 144 [2024-11-01 08:01:06,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:06,408 INFO L225 Difference]: With dead ends: 201 [2024-11-01 08:01:06,408 INFO L226 Difference]: Without dead ends: 122 [2024-11-01 08:01:06,408 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 08:01:06,409 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:06,409 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:01:06,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-01 08:01:06,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2024-11-01 08:01:06,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 110 states have internal predecessors, (129), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:06,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 149 transitions. [2024-11-01 08:01:06,423 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 149 transitions. Word has length 144 [2024-11-01 08:01:06,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:06,424 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 149 transitions. [2024-11-01 08:01:06,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:06,424 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 149 transitions. [2024-11-01 08:01:06,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-01 08:01:06,426 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:06,426 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:06,462 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 08:01:06,627 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 08:01:06,627 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:06,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:06,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1717534559, now seen corresponding path program 1 times [2024-11-01 08:01:06,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:06,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268548701] [2024-11-01 08:01:06,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:06,628 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:06,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:06,629 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 08:01:06,630 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 08:01:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:08,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:08,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-01 08:01:08,720 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2024-11-01 08:01:08,829 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:08,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268548701] [2024-11-01 08:01:08,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [268548701] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:08,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:08,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:08,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968409748] [2024-11-01 08:01:08,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:08,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:08,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:08,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:08,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:08,831 INFO L87 Difference]: Start difference. First operand 122 states and 149 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:08,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:08,963 INFO L93 Difference]: Finished difference Result 208 states and 256 transitions. [2024-11-01 08:01:08,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:01:08,967 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 148 [2024-11-01 08:01:08,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:08,969 INFO L225 Difference]: With dead ends: 208 [2024-11-01 08:01:08,969 INFO L226 Difference]: Without dead ends: 126 [2024-11-01 08:01:08,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:08,970 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:08,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 459 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:01:08,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-01 08:01:08,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-11-01 08:01:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 114 states have internal predecessors, (133), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:08,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 153 transitions. [2024-11-01 08:01:08,982 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 153 transitions. Word has length 148 [2024-11-01 08:01:08,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:08,983 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 153 transitions. [2024-11-01 08:01:08,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:08,983 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 153 transitions. [2024-11-01 08:01:08,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-01 08:01:08,984 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:08,984 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:09,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:09,185 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 08:01:09,185 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:09,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:09,185 INFO L85 PathProgramCache]: Analyzing trace with hash 9888219, now seen corresponding path program 2 times [2024-11-01 08:01:09,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:09,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445464345] [2024-11-01 08:01:09,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:09,186 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:09,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:09,187 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 08:01:09,188 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 08:01:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:11,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:11,314 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-11-01 08:01:11,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-01 08:01:11,371 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:11,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445464345] [2024-11-01 08:01:11,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [445464345] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:11,371 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:11,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:11,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065060136] [2024-11-01 08:01:11,371 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:11,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:11,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:11,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:11,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:11,373 INFO L87 Difference]: Start difference. First operand 126 states and 153 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:11,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:11,414 INFO L93 Difference]: Finished difference Result 215 states and 263 transitions. [2024-11-01 08:01:11,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:11,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 152 [2024-11-01 08:01:11,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:11,418 INFO L225 Difference]: With dead ends: 215 [2024-11-01 08:01:11,418 INFO L226 Difference]: Without dead ends: 129 [2024-11-01 08:01:11,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:11,420 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:11,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:11,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-01 08:01:11,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2024-11-01 08:01:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 117 states have (on average 1.1623931623931625) internal successors, (136), 117 states have internal predecessors, (136), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2024-11-01 08:01:11,432 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 152 [2024-11-01 08:01:11,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:11,433 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2024-11-01 08:01:11,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:11,433 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2024-11-01 08:01:11,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-01 08:01:11,434 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:11,435 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:11,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2024-11-01 08:01:11,635 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 08:01:11,635 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:11,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:11,636 INFO L85 PathProgramCache]: Analyzing trace with hash 454071767, now seen corresponding path program 1 times [2024-11-01 08:01:11,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:11,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112339032] [2024-11-01 08:01:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:11,636 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:11,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:11,638 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 08:01:11,638 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 08:01:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:13,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 1624 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:13,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-11-01 08:01:13,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-01 08:01:13,993 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:13,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112339032] [2024-11-01 08:01:13,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2112339032] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:13,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:13,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:13,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566064553] [2024-11-01 08:01:13,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:13,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:13,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:13,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:13,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:13,995 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:14,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:14,087 INFO L93 Difference]: Finished difference Result 222 states and 270 transitions. [2024-11-01 08:01:14,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:01:14,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 156 [2024-11-01 08:01:14,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:14,091 INFO L225 Difference]: With dead ends: 222 [2024-11-01 08:01:14,091 INFO L226 Difference]: Without dead ends: 133 [2024-11-01 08:01:14,091 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:14,092 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:14,092 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 368 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:01:14,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-01 08:01:14,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2024-11-01 08:01:14,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 121 states have (on average 1.1570247933884297) internal successors, (140), 121 states have internal predecessors, (140), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:14,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 160 transitions. [2024-11-01 08:01:14,104 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 160 transitions. Word has length 156 [2024-11-01 08:01:14,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:14,104 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 160 transitions. [2024-11-01 08:01:14,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:14,105 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 160 transitions. [2024-11-01 08:01:14,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-01 08:01:14,107 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:14,107 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:14,148 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 08:01:14,307 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 08:01:14,308 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:14,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:14,308 INFO L85 PathProgramCache]: Analyzing trace with hash 962063315, now seen corresponding path program 2 times [2024-11-01 08:01:14,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:14,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87254474] [2024-11-01 08:01:14,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:14,309 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:14,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:14,310 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 08:01:14,311 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 08:01:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:16,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 1636 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:16,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-01 08:01:16,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-01 08:01:16,702 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:16,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87254474] [2024-11-01 08:01:16,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [87254474] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:16,703 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:16,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:16,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28834239] [2024-11-01 08:01:16,703 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:16,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:16,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:16,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:16,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:16,704 INFO L87 Difference]: Start difference. First operand 133 states and 160 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:16,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:16,744 INFO L93 Difference]: Finished difference Result 229 states and 277 transitions. [2024-11-01 08:01:16,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:16,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 160 [2024-11-01 08:01:16,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:16,748 INFO L225 Difference]: With dead ends: 229 [2024-11-01 08:01:16,748 INFO L226 Difference]: Without dead ends: 136 [2024-11-01 08:01:16,749 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 08:01:16,749 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:16,750 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:16,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-01 08:01:16,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2024-11-01 08:01:16,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 124 states have (on average 1.153225806451613) internal successors, (143), 124 states have internal predecessors, (143), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 163 transitions. [2024-11-01 08:01:16,760 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 163 transitions. Word has length 160 [2024-11-01 08:01:16,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:16,761 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 163 transitions. [2024-11-01 08:01:16,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:16,762 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 163 transitions. [2024-11-01 08:01:16,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-11-01 08:01:16,763 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:16,763 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:16,820 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 08:01:16,963 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 08:01:16,964 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:16,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:16,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1846430897, now seen corresponding path program 1 times [2024-11-01 08:01:16,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:16,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600946177] [2024-11-01 08:01:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:16,965 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:16,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:16,968 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 08:01:16,970 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 08:01:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:19,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 1648 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:19,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-01 08:01:19,423 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-01 08:01:19,490 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:19,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600946177] [2024-11-01 08:01:19,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1600946177] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:19,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:19,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:19,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610574191] [2024-11-01 08:01:19,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:19,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:19,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:19,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:19,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:19,492 INFO L87 Difference]: Start difference. First operand 136 states and 163 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:19,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:19,561 INFO L93 Difference]: Finished difference Result 236 states and 284 transitions. [2024-11-01 08:01:19,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:01:19,563 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 164 [2024-11-01 08:01:19,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:19,564 INFO L225 Difference]: With dead ends: 236 [2024-11-01 08:01:19,564 INFO L226 Difference]: Without dead ends: 140 [2024-11-01 08:01:19,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:19,565 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:19,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 368 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:01:19,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-01 08:01:19,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2024-11-01 08:01:19,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 128 states have (on average 1.1484375) internal successors, (147), 128 states have internal predecessors, (147), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:19,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 167 transitions. [2024-11-01 08:01:19,577 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 167 transitions. Word has length 164 [2024-11-01 08:01:19,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:19,578 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 167 transitions. [2024-11-01 08:01:19,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:19,578 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 167 transitions. [2024-11-01 08:01:19,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2024-11-01 08:01:19,579 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:19,579 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:19,626 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 08:01:19,779 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 08:01:19,780 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:19,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:19,780 INFO L85 PathProgramCache]: Analyzing trace with hash -249340725, now seen corresponding path program 2 times [2024-11-01 08:01:19,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:19,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309712783] [2024-11-01 08:01:19,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:19,781 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:19,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:19,782 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 08:01:19,783 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 08:01:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:22,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 1660 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:22,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-01 08:01:22,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2024-11-01 08:01:22,373 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:22,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309712783] [2024-11-01 08:01:22,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1309712783] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:22,374 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:22,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:22,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470369325] [2024-11-01 08:01:22,374 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:22,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:22,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:22,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:22,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:22,377 INFO L87 Difference]: Start difference. First operand 140 states and 167 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:22,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:22,424 INFO L93 Difference]: Finished difference Result 243 states and 291 transitions. [2024-11-01 08:01:22,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:22,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 168 [2024-11-01 08:01:22,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:22,430 INFO L225 Difference]: With dead ends: 243 [2024-11-01 08:01:22,430 INFO L226 Difference]: Without dead ends: 143 [2024-11-01 08:01:22,431 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:22,431 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:22,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:22,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-01 08:01:22,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2024-11-01 08:01:22,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 131 states have (on average 1.1450381679389312) internal successors, (150), 131 states have internal predecessors, (150), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:22,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 170 transitions. [2024-11-01 08:01:22,444 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 170 transitions. Word has length 168 [2024-11-01 08:01:22,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:22,444 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 170 transitions. [2024-11-01 08:01:22,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:22,445 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 170 transitions. [2024-11-01 08:01:22,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-11-01 08:01:22,445 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:22,446 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:22,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:22,646 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 08:01:22,647 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:22,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:22,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1686083527, now seen corresponding path program 1 times [2024-11-01 08:01:22,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:22,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333196432] [2024-11-01 08:01:22,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:22,648 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:22,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:22,650 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 08:01:22,651 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 08:01:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:25,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 1672 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:25,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-01 08:01:25,363 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2024-11-01 08:01:25,425 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:25,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333196432] [2024-11-01 08:01:25,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1333196432] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:25,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:25,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:25,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762654423] [2024-11-01 08:01:25,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:25,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:25,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:25,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:25,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:25,427 INFO L87 Difference]: Start difference. First operand 143 states and 170 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:25,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:25,511 INFO L93 Difference]: Finished difference Result 250 states and 298 transitions. [2024-11-01 08:01:25,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:01:25,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 172 [2024-11-01 08:01:25,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:25,516 INFO L225 Difference]: With dead ends: 250 [2024-11-01 08:01:25,516 INFO L226 Difference]: Without dead ends: 147 [2024-11-01 08:01:25,516 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:25,517 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:25,518 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 368 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:01:25,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-01 08:01:25,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-11-01 08:01:25,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 135 states have internal predecessors, (154), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:25,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2024-11-01 08:01:25,535 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 172 [2024-11-01 08:01:25,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:25,536 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2024-11-01 08:01:25,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:25,536 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2024-11-01 08:01:25,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2024-11-01 08:01:25,537 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:25,537 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:25,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2024-11-01 08:01:25,737 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 08:01:25,738 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:25,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:25,738 INFO L85 PathProgramCache]: Analyzing trace with hash 151909571, now seen corresponding path program 2 times [2024-11-01 08:01:25,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:25,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916082428] [2024-11-01 08:01:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:25,739 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:25,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:25,740 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 08:01:25,741 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 08:01:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:28,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:28,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-11-01 08:01:28,542 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-11-01 08:01:28,576 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:28,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916082428] [2024-11-01 08:01:28,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [916082428] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:28,576 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:28,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:28,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713984246] [2024-11-01 08:01:28,576 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:28,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:28,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:28,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:28,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:28,577 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:28,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:28,615 INFO L93 Difference]: Finished difference Result 257 states and 305 transitions. [2024-11-01 08:01:28,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:28,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 176 [2024-11-01 08:01:28,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:28,618 INFO L225 Difference]: With dead ends: 257 [2024-11-01 08:01:28,618 INFO L226 Difference]: Without dead ends: 150 [2024-11-01 08:01:28,619 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:28,620 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:28,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:28,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-01 08:01:28,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-11-01 08:01:28,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:28,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 177 transitions. [2024-11-01 08:01:28,634 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 177 transitions. Word has length 176 [2024-11-01 08:01:28,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:28,635 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 177 transitions. [2024-11-01 08:01:28,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:28,635 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 177 transitions. [2024-11-01 08:01:28,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2024-11-01 08:01:28,636 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:28,636 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:28,686 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 08:01:28,836 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 08:01:28,837 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:28,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:28,837 INFO L85 PathProgramCache]: Analyzing trace with hash -848886977, now seen corresponding path program 1 times [2024-11-01 08:01:28,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:28,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596282417] [2024-11-01 08:01:28,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:28,838 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:28,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:28,840 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 08:01:28,841 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 08:01:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:31,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 1696 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:31,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-11-01 08:01:31,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:31,785 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-11-01 08:01:31,785 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:31,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596282417] [2024-11-01 08:01:31,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1596282417] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:31,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:31,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:31,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446857769] [2024-11-01 08:01:31,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:31,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:31,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:31,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:31,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:31,787 INFO L87 Difference]: Start difference. First operand 150 states and 177 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:31,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:31,854 INFO L93 Difference]: Finished difference Result 264 states and 312 transitions. [2024-11-01 08:01:31,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:01:31,856 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 180 [2024-11-01 08:01:31,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:31,858 INFO L225 Difference]: With dead ends: 264 [2024-11-01 08:01:31,858 INFO L226 Difference]: Without dead ends: 154 [2024-11-01 08:01:31,858 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:31,859 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:31,859 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 368 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:01:31,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-01 08:01:31,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2024-11-01 08:01:31,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 142 states have internal predecessors, (161), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 181 transitions. [2024-11-01 08:01:31,869 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 181 transitions. Word has length 180 [2024-11-01 08:01:31,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:31,869 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 181 transitions. [2024-11-01 08:01:31,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:31,870 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 181 transitions. [2024-11-01 08:01:31,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-11-01 08:01:31,871 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:31,871 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:31,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:32,071 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 08:01:32,072 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:32,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:32,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1990429765, now seen corresponding path program 2 times [2024-11-01 08:01:32,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:32,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280499399] [2024-11-01 08:01:32,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:32,073 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:32,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:32,074 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:32,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2024-11-01 08:01:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:34,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 1708 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:34,983 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2024-11-01 08:01:34,995 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2024-11-01 08:01:35,048 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:35,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280499399] [2024-11-01 08:01:35,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1280499399] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:35,048 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:35,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:35,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578233384] [2024-11-01 08:01:35,049 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:35,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:35,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:35,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:35,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:35,050 INFO L87 Difference]: Start difference. First operand 154 states and 181 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:35,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:35,095 INFO L93 Difference]: Finished difference Result 271 states and 319 transitions. [2024-11-01 08:01:35,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:35,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 184 [2024-11-01 08:01:35,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:35,101 INFO L225 Difference]: With dead ends: 271 [2024-11-01 08:01:35,101 INFO L226 Difference]: Without dead ends: 157 [2024-11-01 08:01:35,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:35,102 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:35,104 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:35,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-01 08:01:35,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2024-11-01 08:01:35,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 145 states have (on average 1.1310344827586207) internal successors, (164), 145 states have internal predecessors, (164), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 184 transitions. [2024-11-01 08:01:35,115 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 184 transitions. Word has length 184 [2024-11-01 08:01:35,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:35,115 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 184 transitions. [2024-11-01 08:01:35,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:35,116 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 184 transitions. [2024-11-01 08:01:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2024-11-01 08:01:35,117 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:35,117 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:35,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2024-11-01 08:01:35,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:35,317 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:35,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:35,318 INFO L85 PathProgramCache]: Analyzing trace with hash 881112503, now seen corresponding path program 1 times [2024-11-01 08:01:35,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:35,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927179368] [2024-11-01 08:01:35,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:35,319 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:35,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:35,320 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:35,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2024-11-01 08:01:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:38,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 1720 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:38,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2024-11-01 08:01:38,395 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2024-11-01 08:01:38,474 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:38,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927179368] [2024-11-01 08:01:38,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1927179368] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:38,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:38,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:38,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261448927] [2024-11-01 08:01:38,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:38,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:38,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:38,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:38,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:38,477 INFO L87 Difference]: Start difference. First operand 157 states and 184 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:38,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:38,583 INFO L93 Difference]: Finished difference Result 278 states and 326 transitions. [2024-11-01 08:01:38,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:01:38,586 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 188 [2024-11-01 08:01:38,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:38,587 INFO L225 Difference]: With dead ends: 278 [2024-11-01 08:01:38,587 INFO L226 Difference]: Without dead ends: 161 [2024-11-01 08:01:38,588 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:38,588 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:38,589 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 368 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:01:38,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-01 08:01:38,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2024-11-01 08:01:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 149 states have (on average 1.1275167785234899) internal successors, (168), 149 states have internal predecessors, (168), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:38,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 188 transitions. [2024-11-01 08:01:38,600 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 188 transitions. Word has length 188 [2024-11-01 08:01:38,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:38,601 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 188 transitions. [2024-11-01 08:01:38,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:38,601 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 188 transitions. [2024-11-01 08:01:38,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-11-01 08:01:38,602 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:38,602 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:38,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:38,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:38,803 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:38,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:38,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1383884365, now seen corresponding path program 2 times [2024-11-01 08:01:38,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:38,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470956440] [2024-11-01 08:01:38,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:38,804 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:38,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:38,806 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:38,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2024-11-01 08:01:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:41,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 1732 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:41,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-11-01 08:01:41,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2024-11-01 08:01:41,918 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:41,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470956440] [2024-11-01 08:01:41,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [470956440] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:41,918 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:41,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:41,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588550752] [2024-11-01 08:01:41,919 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:41,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:41,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:41,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:41,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:41,920 INFO L87 Difference]: Start difference. First operand 161 states and 188 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:41,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:41,947 INFO L93 Difference]: Finished difference Result 285 states and 333 transitions. [2024-11-01 08:01:41,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:41,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 192 [2024-11-01 08:01:41,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:41,951 INFO L225 Difference]: With dead ends: 285 [2024-11-01 08:01:41,951 INFO L226 Difference]: Without dead ends: 164 [2024-11-01 08:01:41,951 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:41,952 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:41,952 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:41,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-01 08:01:41,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2024-11-01 08:01:41,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 152 states have (on average 1.125) internal successors, (171), 152 states have internal predecessors, (171), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 191 transitions. [2024-11-01 08:01:41,967 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 191 transitions. Word has length 192 [2024-11-01 08:01:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:41,967 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 191 transitions. [2024-11-01 08:01:41,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 191 transitions. [2024-11-01 08:01:41,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2024-11-01 08:01:41,968 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:41,968 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:42,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2024-11-01 08:01:42,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:42,169 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:42,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:42,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1159368913, now seen corresponding path program 1 times [2024-11-01 08:01:42,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:42,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052879956] [2024-11-01 08:01:42,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:42,170 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:42,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:42,173 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:42,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2024-11-01 08:01:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:45,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 1744 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:45,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-11-01 08:01:45,402 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2024-11-01 08:01:45,467 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:45,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052879956] [2024-11-01 08:01:45,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2052879956] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:45,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:45,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:45,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817504700] [2024-11-01 08:01:45,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:45,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:45,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:45,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:45,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:45,469 INFO L87 Difference]: Start difference. First operand 164 states and 191 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:45,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:45,548 INFO L93 Difference]: Finished difference Result 292 states and 340 transitions. [2024-11-01 08:01:45,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:01:45,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 196 [2024-11-01 08:01:45,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:45,551 INFO L225 Difference]: With dead ends: 292 [2024-11-01 08:01:45,551 INFO L226 Difference]: Without dead ends: 168 [2024-11-01 08:01:45,552 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:45,553 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:45,553 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 368 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:01:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-01 08:01:45,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2024-11-01 08:01:45,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 156 states have (on average 1.1217948717948718) internal successors, (175), 156 states have internal predecessors, (175), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:45,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 195 transitions. [2024-11-01 08:01:45,565 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 195 transitions. Word has length 196 [2024-11-01 08:01:45,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:45,565 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 195 transitions. [2024-11-01 08:01:45,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:45,565 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 195 transitions. [2024-11-01 08:01:45,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-11-01 08:01:45,566 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:45,566 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:45,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:45,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:45,767 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:45,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:45,768 INFO L85 PathProgramCache]: Analyzing trace with hash -265804117, now seen corresponding path program 2 times [2024-11-01 08:01:45,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:45,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089170235] [2024-11-01 08:01:45,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:45,768 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:45,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:45,769 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:45,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2024-11-01 08:01:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:48,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 1756 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:48,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2024-11-01 08:01:48,990 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2024-11-01 08:01:49,023 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:49,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089170235] [2024-11-01 08:01:49,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2089170235] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:49,023 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:49,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:49,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423254037] [2024-11-01 08:01:49,023 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:49,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:49,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:49,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:49,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:49,025 INFO L87 Difference]: Start difference. First operand 168 states and 195 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:49,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:49,091 INFO L93 Difference]: Finished difference Result 299 states and 347 transitions. [2024-11-01 08:01:49,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:49,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 200 [2024-11-01 08:01:49,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:49,093 INFO L225 Difference]: With dead ends: 299 [2024-11-01 08:01:49,093 INFO L226 Difference]: Without dead ends: 171 [2024-11-01 08:01:49,094 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:49,094 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:49,095 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:49,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-01 08:01:49,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2024-11-01 08:01:49,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 159 states have (on average 1.119496855345912) internal successors, (178), 159 states have internal predecessors, (178), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:49,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 198 transitions. [2024-11-01 08:01:49,106 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 198 transitions. Word has length 200 [2024-11-01 08:01:49,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:49,107 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 198 transitions. [2024-11-01 08:01:49,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:49,107 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 198 transitions. [2024-11-01 08:01:49,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2024-11-01 08:01:49,108 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:49,108 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:49,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:49,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:49,309 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:49,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:49,309 INFO L85 PathProgramCache]: Analyzing trace with hash -960106585, now seen corresponding path program 1 times [2024-11-01 08:01:49,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:49,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552939190] [2024-11-01 08:01:49,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:49,310 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:49,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:49,319 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:49,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2024-11-01 08:01:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:52,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 1768 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:01:52,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-01 08:01:52,665 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2024-11-01 08:01:52,698 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:52,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552939190] [2024-11-01 08:01:52,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1552939190] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:01:52,698 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:01:52,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:01:52,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010319692] [2024-11-01 08:01:52,698 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:01:52,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:01:52,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:52,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:01:52,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:52,700 INFO L87 Difference]: Start difference. First operand 171 states and 198 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:52,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:52,739 INFO L93 Difference]: Finished difference Result 305 states and 353 transitions. [2024-11-01 08:01:52,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:01:52,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 204 [2024-11-01 08:01:52,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:52,741 INFO L225 Difference]: With dead ends: 305 [2024-11-01 08:01:52,741 INFO L226 Difference]: Without dead ends: 174 [2024-11-01 08:01:52,742 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:01:52,742 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:52,743 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:01:52,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-01 08:01:52,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2024-11-01 08:01:52,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 162 states have (on average 1.117283950617284) internal successors, (181), 162 states have internal predecessors, (181), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:52,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 201 transitions. [2024-11-01 08:01:52,755 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 201 transitions. Word has length 204 [2024-11-01 08:01:52,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:52,755 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 201 transitions. [2024-11-01 08:01:52,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:52,756 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 201 transitions. [2024-11-01 08:01:52,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2024-11-01 08:01:52,756 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:52,757 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:52,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:52,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:52,957 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:52,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:52,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1004530211, now seen corresponding path program 1 times [2024-11-01 08:01:52,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:52,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659875392] [2024-11-01 08:01:52,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:52,958 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:52,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:52,959 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:52,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2024-11-01 08:01:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:01:56,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:01:56,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:01:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-01 08:01:56,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:01:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2024-11-01 08:01:56,533 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:01:56,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659875392] [2024-11-01 08:01:56,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [659875392] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:01:56,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:01:56,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:01:56,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310714079] [2024-11-01 08:01:56,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:01:56,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:01:56,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:01:56,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:01:56,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:56,535 INFO L87 Difference]: Start difference. First operand 174 states and 201 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:56,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:01:56,604 INFO L93 Difference]: Finished difference Result 312 states and 360 transitions. [2024-11-01 08:01:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:01:56,604 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 208 [2024-11-01 08:01:56,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:01:56,606 INFO L225 Difference]: With dead ends: 312 [2024-11-01 08:01:56,606 INFO L226 Difference]: Without dead ends: 178 [2024-11-01 08:01:56,607 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:01:56,607 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:01:56,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 459 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:01:56,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-01 08:01:56,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2024-11-01 08:01:56,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 166 states have (on average 1.1144578313253013) internal successors, (185), 166 states have internal predecessors, (185), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:01:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 205 transitions. [2024-11-01 08:01:56,620 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 205 transitions. Word has length 208 [2024-11-01 08:01:56,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:01:56,620 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 205 transitions. [2024-11-01 08:01:56,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:01:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 205 transitions. [2024-11-01 08:01:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2024-11-01 08:01:56,621 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:01:56,622 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:01:56,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2024-11-01 08:01:56,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:56,822 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:01:56,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:01:56,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1178617503, now seen corresponding path program 2 times [2024-11-01 08:01:56,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:01:56,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529232233] [2024-11-01 08:01:56,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:01:56,823 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:01:56,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:01:56,824 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:01:56,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2024-11-01 08:02:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:02:00,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 1792 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 08:02:00,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:02:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-01 08:02:00,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:02:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2024-11-01 08:02:00,362 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:02:00,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529232233] [2024-11-01 08:02:00,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [529232233] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:02:00,362 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:02:00,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 08:02:00,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675168751] [2024-11-01 08:02:00,362 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:02:00,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 08:02:00,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:02:00,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 08:02:00,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:02:00,363 INFO L87 Difference]: Start difference. First operand 178 states and 205 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:02:00,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:02:00,425 INFO L93 Difference]: Finished difference Result 319 states and 367 transitions. [2024-11-01 08:02:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:02:00,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 212 [2024-11-01 08:02:00,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:02:00,428 INFO L225 Difference]: With dead ends: 319 [2024-11-01 08:02:00,428 INFO L226 Difference]: Without dead ends: 181 [2024-11-01 08:02:00,429 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 08:02:00,429 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-01 08:02:00,430 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-01 08:02:00,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-01 08:02:00,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2024-11-01 08:02:00,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 169 states have (on average 1.1124260355029585) internal successors, (188), 169 states have internal predecessors, (188), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:02:00,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 208 transitions. [2024-11-01 08:02:00,442 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 208 transitions. Word has length 212 [2024-11-01 08:02:00,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:02:00,443 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 208 transitions. [2024-11-01 08:02:00,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:02:00,443 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 208 transitions. [2024-11-01 08:02:00,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2024-11-01 08:02:00,444 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:02:00,444 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:02:00,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2024-11-01 08:02:00,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:02:00,645 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:02:00,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:02:00,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1868237669, now seen corresponding path program 1 times [2024-11-01 08:02:00,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:02:00,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078220634] [2024-11-01 08:02:00,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:02:00,646 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:02:00,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:02:00,647 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:02:00,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2024-11-01 08:02:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:02:04,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-01 08:02:04,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:02:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-01 08:02:04,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:02:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2024-11-01 08:02:04,282 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:02:04,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078220634] [2024-11-01 08:02:04,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2078220634] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:02:04,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:02:04,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 08:02:04,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941885383] [2024-11-01 08:02:04,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:02:04,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 08:02:04,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:02:04,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 08:02:04,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:02:04,283 INFO L87 Difference]: Start difference. First operand 181 states and 208 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:02:04,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:02:04,341 INFO L93 Difference]: Finished difference Result 326 states and 374 transitions. [2024-11-01 08:02:04,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-01 08:02:04,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 216 [2024-11-01 08:02:04,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:02:04,343 INFO L225 Difference]: With dead ends: 326 [2024-11-01 08:02:04,343 INFO L226 Difference]: Without dead ends: 185 [2024-11-01 08:02:04,344 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-01 08:02:04,344 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-01 08:02:04,344 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 368 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:02:04,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-01 08:02:04,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2024-11-01 08:02:04,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 173 states have (on average 1.1098265895953756) internal successors, (192), 173 states have internal predecessors, (192), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-01 08:02:04,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 212 transitions. [2024-11-01 08:02:04,357 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 212 transitions. Word has length 216 [2024-11-01 08:02:04,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:02:04,358 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 212 transitions. [2024-11-01 08:02:04,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-01 08:02:04,358 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 212 transitions. [2024-11-01 08:02:04,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2024-11-01 08:02:04,359 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:02:04,359 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-01 08:02:04,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2024-11-01 08:02:04,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-01 08:02:04,560 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:02:04,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:02:04,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1664465769, now seen corresponding path program 2 times [2024-11-01 08:02:04,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:02:04,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175902405] [2024-11-01 08:02:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:02:04,561 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:02:04,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:02:04,564 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-01 08:02:04,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2024-11-01 08:02:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:02:09,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 1816 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-01 08:02:09,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:02:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-11-01 08:02:10,011 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:02:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-11-01 08:02:12,856 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:02:12,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175902405] [2024-11-01 08:02:12,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1175902405] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:02:12,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:02:12,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2024-11-01 08:02:12,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139773327] [2024-11-01 08:02:12,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:02:12,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-01 08:02:12,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:02:12,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-01 08:02:12,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2024-11-01 08:02:12,859 INFO L87 Difference]: Start difference. First operand 185 states and 212 transitions. Second operand has 19 states, 17 states have (on average 10.941176470588236) internal successors, (186), 19 states have internal predecessors, (186), 6 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20)