/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-bv/btor2c-lazyMod.arbitrated_top_n2_w16_d128_e0.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-11-01 08:03:14,532 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-01 08:03:14,622 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 08:03:14,630 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-01 08:03:14,631 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-01 08:03:14,666 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-01 08:03:14,666 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-01 08:03:14,667 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-01 08:03:14,668 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-01 08:03:14,672 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-01 08:03:14,672 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-01 08:03:14,672 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-01 08:03:14,673 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-01 08:03:14,673 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-01 08:03:14,674 INFO L153 SettingsManager]: * Use SBE=true [2024-11-01 08:03:14,674 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-01 08:03:14,674 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-01 08:03:14,674 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-01 08:03:14,675 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-01 08:03:14,675 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-01 08:03:14,676 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-01 08:03:14,676 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-01 08:03:14,677 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-01 08:03:14,677 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-01 08:03:14,677 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-01 08:03:14,677 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-01 08:03:14,678 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-01 08:03:14,678 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-01 08:03:14,678 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-01 08:03:14,678 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-01 08:03:14,679 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-01 08:03:14,679 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-01 08:03:14,679 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-01 08:03:14,679 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-01 08:03:14,680 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-01 08:03:14,680 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-01 08:03:14,682 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-01 08:03:14,682 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-01 08:03:14,682 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-01 08:03:14,682 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-01 08:03:14,683 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-01 08:03:14,683 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-11-01 08:03:14,683 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-11-01 08:03:15,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-01 08:03:15,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-01 08:03:15,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-01 08:03:15,095 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-01 08:03:15,095 INFO L274 PluginConnector]: CDTParser initialized [2024-11-01 08:03:15,096 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w16_d128_e0.c [2024-11-01 08:03:16,522 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-01 08:03:17,082 INFO L384 CDTParser]: Found 1 translation units. [2024-11-01 08:03:17,083 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w16_d128_e0.c [2024-11-01 08:03:17,137 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b133ecc37/ed0c33d282d24d4e904644fb2276031a/FLAGcaeeb48db [2024-11-01 08:03:17,158 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b133ecc37/ed0c33d282d24d4e904644fb2276031a [2024-11-01 08:03:17,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-01 08:03:17,163 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-01 08:03:17,166 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-01 08:03:17,166 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-01 08:03:17,171 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-01 08:03:17,171 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 08:03:17" (1/1) ... [2024-11-01 08:03:17,172 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c051444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:03:17, skipping insertion in model container [2024-11-01 08:03:17,173 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 08:03:17" (1/1) ... [2024-11-01 08:03:17,391 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-01 08:03:17,695 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_n2_w16_d128_e0.c[1272,1285] [2024-11-01 08:03:18,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-01 08:03:18,478 INFO L200 MainTranslator]: Completed pre-run [2024-11-01 08:03:18,490 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_n2_w16_d128_e0.c[1272,1285] [2024-11-01 08:03:18,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-01 08:03:18,898 INFO L204 MainTranslator]: Completed translation [2024-11-01 08:03:18,898 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:03:18 WrapperNode [2024-11-01 08:03:18,899 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-01 08:03:18,900 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-01 08:03:18,900 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-01 08:03:18,900 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-01 08:03:18,909 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:03:18" (1/1) ... [2024-11-01 08:03:19,033 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:03:18" (1/1) ... [2024-11-01 08:03:19,350 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 8527 [2024-11-01 08:03:19,351 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-01 08:03:19,352 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-01 08:03:19,352 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-01 08:03:19,352 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-01 08:03:19,362 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:03:18" (1/1) ... [2024-11-01 08:03:19,363 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:03:18" (1/1) ... [2024-11-01 08:03:19,451 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:03:18" (1/1) ... [2024-11-01 08:03:19,595 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]. [2024-11-01 08:03:19,596 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:03:18" (1/1) ... [2024-11-01 08:03:19,596 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:03:18" (1/1) ... [2024-11-01 08:03:19,745 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:03:18" (1/1) ... [2024-11-01 08:03:19,772 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:03:18" (1/1) ... [2024-11-01 08:03:19,801 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:03:18" (1/1) ... [2024-11-01 08:03:19,825 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:03:18" (1/1) ... [2024-11-01 08:03:19,877 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-01 08:03:19,878 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-01 08:03:19,878 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-01 08:03:19,878 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-01 08:03:19,879 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:03:18" (1/1) ... [2024-11-01 08:03:19,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-01 08:03:19,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-01 08:03:19,909 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 08:03:19,912 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 08:03:19,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-01 08:03:19,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-01 08:03:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-01 08:03:19,942 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-01 08:03:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-01 08:03:19,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-01 08:03:21,066 INFO L238 CfgBuilder]: Building ICFG [2024-11-01 08:03:21,068 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-01 08:03:29,850 INFO L? ?]: Removed 2345 outVars from TransFormulas that were not future-live. [2024-11-01 08:03:29,850 INFO L287 CfgBuilder]: Performing block encoding [2024-11-01 08:03:29,863 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-01 08:03:29,864 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-01 08:03:29,865 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.11 08:03:29 BoogieIcfgContainer [2024-11-01 08:03:29,865 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-01 08:03:29,867 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-01 08:03:29,868 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-01 08:03:29,871 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-01 08:03:29,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.11 08:03:17" (1/3) ... [2024-11-01 08:03:29,872 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37faa4e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.11 08:03:29, skipping insertion in model container [2024-11-01 08:03:29,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:03:18" (2/3) ... [2024-11-01 08:03:29,873 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37faa4e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.11 08:03:29, skipping insertion in model container [2024-11-01 08:03:29,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.11 08:03:29" (3/3) ... [2024-11-01 08:03:29,875 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.arbitrated_top_n2_w16_d128_e0.c [2024-11-01 08:03:29,891 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-01 08:03:29,891 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-01 08:03:29,954 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-01 08:03:29,962 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;@f04042d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-01 08:03:29,963 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-01 08:03:29,967 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-01 08:03:29,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-01 08:03:29,976 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:03:29,976 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 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 08:03:29,977 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:03:29,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:03:29,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1387212075, now seen corresponding path program 1 times [2024-11-01 08:03:29,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:03:29,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978132867] [2024-11-01 08:03:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:03:29,994 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:03:29,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:03:29,997 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 08:03:29,999 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 08:03:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:03:33,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 2825 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-01 08:03:33,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:03:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-01 08:03:33,437 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:03:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-01 08:03:33,480 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:03:33,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978132867] [2024-11-01 08:03:33,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [978132867] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:03:33,481 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:03:33,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-11-01 08:03:33,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890806146] [2024-11-01 08:03:33,483 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:03:33,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-01 08:03:33,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:03:33,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-01 08:03:33,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-01 08:03:33,506 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-01 08:03:33,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:03:33,523 INFO L93 Difference]: Finished difference Result 51 states and 75 transitions. [2024-11-01 08:03:33,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-01 08:03:33,525 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 47 [2024-11-01 08:03:33,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:03:33,531 INFO L225 Difference]: With dead ends: 51 [2024-11-01 08:03:33,531 INFO L226 Difference]: Without dead ends: 25 [2024-11-01 08:03:33,534 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 92 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 08:03:33,537 INFO L432 NwaCegarLoop]: 31 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, 31 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 08:03:33,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-01 08:03:33,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-01 08:03:33,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-01 08:03:33,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-01 08:03:33,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2024-11-01 08:03:33,570 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 47 [2024-11-01 08:03:33,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:03:33,571 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2024-11-01 08:03:33,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-01 08:03:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2024-11-01 08:03:33,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-01 08:03:33,573 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:03:33,574 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 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 08:03:33,631 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 08:03:33,775 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 08:03:33,776 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:03:33,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:03:33,776 INFO L85 PathProgramCache]: Analyzing trace with hash 971432711, now seen corresponding path program 1 times [2024-11-01 08:03:33,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:03:33,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381609757] [2024-11-01 08:03:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:03:33,777 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:03:33,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:03:33,781 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 08:03:33,782 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 08:03:37,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:03:37,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 2825 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-01 08:03:37,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:03:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-01 08:03:37,995 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:03:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-01 08:03:38,484 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:03:38,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381609757] [2024-11-01 08:03:38,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [381609757] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 08:03:38,484 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 08:03:38,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-11-01 08:03:38,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588286626] [2024-11-01 08:03:38,485 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 08:03:38,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-01 08:03:38,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:03:38,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-01 08:03:38,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-01 08:03:38,488 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-01 08:03:39,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:03:39,742 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2024-11-01 08:03:39,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 08:03:39,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 47 [2024-11-01 08:03:39,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:03:39,744 INFO L225 Difference]: With dead ends: 43 [2024-11-01 08:03:39,744 INFO L226 Difference]: Without dead ends: 41 [2024-11-01 08:03:39,745 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-01 08:03:39,746 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-01 08:03:39,746 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-01 08:03:39,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-01 08:03:39,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-01 08:03:39,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-01 08:03:39,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2024-11-01 08:03:39,761 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 47 [2024-11-01 08:03:39,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:03:39,764 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2024-11-01 08:03:39,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-01 08:03:39,765 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2024-11-01 08:03:39,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-01 08:03:39,770 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:03:39,770 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 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] [2024-11-01 08:03:39,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2024-11-01 08:03:39,970 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 08:03:39,971 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:03:39,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:03:39,972 INFO L85 PathProgramCache]: Analyzing trace with hash 815302051, now seen corresponding path program 1 times [2024-11-01 08:03:39,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:03:39,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929550151] [2024-11-01 08:03:39,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:03:39,973 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:03:39,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:03:39,974 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 08:03:39,975 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 08:03:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:03:47,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 5469 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-01 08:03:47,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:03:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-01 08:03:48,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:03:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-01 08:03:52,508 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 08:03:52,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929550151] [2024-11-01 08:03:52,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1929550151] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 08:03:52,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 08:03:52,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-01 08:03:52,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003280593] [2024-11-01 08:03:52,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 08:03:52,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-01 08:03:52,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 08:03:52,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-01 08:03:52,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-11-01 08:03:52,511 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 15 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 15 states have internal predecessors, (50), 8 states have call successors, (28), 1 states have call predecessors, (28), 2 states have return successors, (28), 6 states have call predecessors, (28), 8 states have call successors, (28) [2024-11-01 08:03:55,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 08:03:55,905 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2024-11-01 08:03:55,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-01 08:03:55,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 15 states have internal predecessors, (50), 8 states have call successors, (28), 1 states have call predecessors, (28), 2 states have return successors, (28), 6 states have call predecessors, (28), 8 states have call successors, (28) Word has length 92 [2024-11-01 08:03:55,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 08:03:55,908 INFO L225 Difference]: With dead ends: 60 [2024-11-01 08:03:55,908 INFO L226 Difference]: Without dead ends: 58 [2024-11-01 08:03:55,908 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-11-01 08:03:55,910 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-01 08:03:55,911 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 124 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-01 08:03:55,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-01 08:03:55,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-01 08:03:55,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-01 08:03:55,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions. [2024-11-01 08:03:55,923 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 92 [2024-11-01 08:03:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 08:03:55,923 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 78 transitions. [2024-11-01 08:03:55,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 15 states have internal predecessors, (50), 8 states have call successors, (28), 1 states have call predecessors, (28), 2 states have return successors, (28), 6 states have call predecessors, (28), 8 states have call successors, (28) [2024-11-01 08:03:55,924 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions. [2024-11-01 08:03:55,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-01 08:03:55,928 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 08:03:55,928 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 21, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2024-11-01 08:03:55,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2024-11-01 08:03:56,129 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 08:03:56,129 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 08:03:56,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 08:03:56,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1845464953, now seen corresponding path program 2 times [2024-11-01 08:03:56,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 08:03:56,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125445360] [2024-11-01 08:03:56,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 08:03:56,131 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 08:03:56,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 08:03:56,132 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 08:03:56,133 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 08:04:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 08:04:07,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 8113 conjuncts, 156 conjuncts are in the unsatisfiable core [2024-11-01 08:04:07,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 08:04:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2024-11-01 08:04:13,533 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 08:04:35,448 WARN L286 SmtUtils]: Spent 9.20s on a formula simplification that was a NOOP. DAG size: 196 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)