/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 Internal_SMTInterpol -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n4_w16_d32_e0.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 23:52:59,170 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 23:52:59,222 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf [2024-10-31 23:52:59,225 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 23:52:59,225 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 23:52:59,251 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 23:52:59,253 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 23:52:59,253 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 23:52:59,254 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 23:52:59,257 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 23:52:59,257 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 23:52:59,257 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 23:52:59,258 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 23:52:59,258 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 23:52:59,258 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 23:52:59,258 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 23:52:59,258 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 23:52:59,259 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 23:52:59,259 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 23:52:59,259 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 23:52:59,261 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 23:52:59,261 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 23:52:59,262 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 23:52:59,262 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 23:52:59,262 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 23:52:59,262 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 23:52:59,262 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 23:52:59,262 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 23:52:59,262 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 23:52:59,263 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 23:52:59,263 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 23:52:59,263 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 23:52:59,263 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 23:52:59,263 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 23:52:59,263 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 23:52:59,263 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 23:52:59,264 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 23:52:59,264 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 23:52:59,264 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 23:52:59,264 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 23:52:59,264 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 23:52:59,265 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 23:52:59,265 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol [2024-10-31 23:52:59,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 23:52:59,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 23:52:59,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 23:52:59,521 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 23:52:59,521 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 23:52:59,522 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n4_w16_d32_e0.c [2024-10-31 23:53:00,701 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 23:53:01,007 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 23:53:01,008 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n4_w16_d32_e0.c [2024-10-31 23:53:01,027 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3b79f415/435bd8d133b9496fbcb662dbaf1365d1/FLAG1e8e07500 [2024-10-31 23:53:01,280 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3b79f415/435bd8d133b9496fbcb662dbaf1365d1 [2024-10-31 23:53:01,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 23:53:01,282 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 23:53:01,283 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 23:53:01,283 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 23:53:01,287 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 23:53:01,287 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 11:53:01" (1/1) ... [2024-10-31 23:53:01,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a6ef0af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:53:01, skipping insertion in model container [2024-10-31 23:53:01,288 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 11:53:01" (1/1) ... [2024-10-31 23:53:01,406 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 23:53:01,571 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-bv/btor2c-lazyMod.arbitrated_top_n4_w16_d32_e0.c[1271,1284] [2024-10-31 23:53:01,937 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 23:53:01,947 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 23:53:01,955 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-bv/btor2c-lazyMod.arbitrated_top_n4_w16_d32_e0.c[1271,1284] [2024-10-31 23:53:02,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 23:53:02,143 INFO L204 MainTranslator]: Completed translation [2024-10-31 23:53:02,144 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:53:02 WrapperNode [2024-10-31 23:53:02,144 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 23:53:02,145 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 23:53:02,145 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 23:53:02,145 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 23:53:02,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:53:02" (1/1) ... [2024-10-31 23:53:02,204 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:53:02" (1/1) ... [2024-10-31 23:53:02,350 INFO L138 Inliner]: procedures = 17, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 5068 [2024-10-31 23:53:02,350 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 23:53:02,352 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 23:53:02,352 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 23:53:02,352 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 23:53:02,359 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:53:02" (1/1) ... [2024-10-31 23:53:02,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:53:02" (1/1) ... [2024-10-31 23:53:02,381 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:53:02" (1/1) ... [2024-10-31 23:53:02,437 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 23:53:02,437 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:53:02" (1/1) ... [2024-10-31 23:53:02,437 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:53:02" (1/1) ... [2024-10-31 23:53:02,480 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:53:02" (1/1) ... [2024-10-31 23:53:02,493 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:53:02" (1/1) ... [2024-10-31 23:53:02,547 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:53:02" (1/1) ... [2024-10-31 23:53:02,564 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:53:02" (1/1) ... [2024-10-31 23:53:02,582 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 23:53:02,583 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 23:53:02,583 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 23:53:02,583 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 23:53:02,584 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:53:02" (1/1) ... [2024-10-31 23:53:02,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 23:53:02,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 23:53:02,613 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) [2024-10-31 23:53:02,616 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 [2024-10-31 23:53:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 23:53:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 23:53:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-31 23:53:02,633 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-31 23:53:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 23:53:02,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 23:53:03,120 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 23:53:03,121 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 23:53:06,036 INFO L? ?]: Removed 1538 outVars from TransFormulas that were not future-live. [2024-10-31 23:53:06,036 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 23:53:06,045 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 23:53:06,046 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 23:53:06,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 11:53:06 BoogieIcfgContainer [2024-10-31 23:53:06,046 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 23:53:06,047 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 23:53:06,047 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 23:53:06,049 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 23:53:06,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 11:53:01" (1/3) ... [2024-10-31 23:53:06,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43875b35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 11:53:06, skipping insertion in model container [2024-10-31 23:53:06,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 11:53:02" (2/3) ... [2024-10-31 23:53:06,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43875b35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 11:53:06, skipping insertion in model container [2024-10-31 23:53:06,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 11:53:06" (3/3) ... [2024-10-31 23:53:06,052 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.arbitrated_top_n4_w16_d32_e0.c [2024-10-31 23:53:06,063 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 23:53:06,063 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 23:53:06,102 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 23:53:06,107 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;@780ad5b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 23:53:06,107 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 23:53:06,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-31 23:53:06,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-10-31 23:53:06,117 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 23:53:06,118 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 23:53:06,118 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 23:53:06,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 23:53:06,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1644883339, now seen corresponding path program 1 times [2024-10-31 23:53:06,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 23:53:06,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884544417] [2024-10-31 23:53:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 23:53:06,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 23:53:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 23:53:08,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-10-31 23:53:08,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 23:53:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-10-31 23:53:08,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 23:53:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-10-31 23:53:08,145 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 23:53:08,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884544417] [2024-10-31 23:53:08,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [884544417] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 23:53:08,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 23:53:08,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-10-31 23:53:08,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940864678] [2024-10-31 23:53:08,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 23:53:08,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 23:53:08,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 23:53:08,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 23:53:08,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 23:53:08,169 INFO L87 Difference]: Start difference. First operand has 40 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2024-10-31 23:53:08,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 23:53:08,186 INFO L93 Difference]: Finished difference Result 75 states and 117 transitions. [2024-10-31 23:53:08,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 23:53:08,187 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 83 [2024-10-31 23:53:08,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 23:53:08,195 INFO L225 Difference]: With dead ends: 75 [2024-10-31 23:53:08,195 INFO L226 Difference]: Without dead ends: 37 [2024-10-31 23:53:08,197 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 23:53:08,199 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 23:53:08,199 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 23:53:08,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-31 23:53:08,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-10-31 23:53:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-31 23:53:08,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2024-10-31 23:53:08,224 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 83 [2024-10-31 23:53:08,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 23:53:08,225 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2024-10-31 23:53:08,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2024-10-31 23:53:08,225 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2024-10-31 23:53:08,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-10-31 23:53:08,227 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 23:53:08,227 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 23:53:08,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 23:53:08,227 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 23:53:08,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 23:53:08,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1385434447, now seen corresponding path program 1 times [2024-10-31 23:53:08,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 23:53:08,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32523362] [2024-10-31 23:53:08,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 23:53:08,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms