/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 --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.trace.refinement.strategy FOX -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.safe_intersymbol_analog_estimation_convergence.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-17387ad-m [2024-11-06 16:15:12,341 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-06 16:15:12,417 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf [2024-11-06 16:15:12,423 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-06 16:15:12,424 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-06 16:15:12,452 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-06 16:15:12,452 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-06 16:15:12,453 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-06 16:15:12,453 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-06 16:15:12,454 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-06 16:15:12,454 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-06 16:15:12,454 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-06 16:15:12,455 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-06 16:15:12,458 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-06 16:15:12,458 INFO L153 SettingsManager]: * Use SBE=true [2024-11-06 16:15:12,458 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-06 16:15:12,459 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-06 16:15:12,459 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-06 16:15:12,459 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-06 16:15:12,459 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-06 16:15:12,460 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-06 16:15:12,462 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-06 16:15:12,462 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-06 16:15:12,462 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-06 16:15:12,462 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-06 16:15:12,463 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-06 16:15:12,463 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-06 16:15:12,463 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-06 16:15:12,463 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-06 16:15:12,464 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-06 16:15:12,464 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-06 16:15:12,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 16:15:12,464 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-06 16:15:12,465 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-06 16:15:12,465 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-06 16:15:12,465 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-06 16:15:12,465 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-06 16:15:12,465 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-06 16:15:12,466 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-06 16:15:12,466 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-06 16:15:12,466 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-06 16:15:12,467 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FOX [2024-11-06 16:15:12,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-06 16:15:12,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-06 16:15:12,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-06 16:15:12,738 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-06 16:15:12,739 INFO L274 PluginConnector]: CDTParser initialized [2024-11-06 16:15:12,740 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.safe_intersymbol_analog_estimation_convergence.c [2024-11-06 16:15:14,092 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-06 16:15:14,369 INFO L384 CDTParser]: Found 1 translation units. [2024-11-06 16:15:14,370 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.safe_intersymbol_analog_estimation_convergence.c [2024-11-06 16:15:14,381 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d98de1cb7/1efbe17e29dc4debb40a32ec7d7e1fe7/FLAGbb34a3232 [2024-11-06 16:15:14,705 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d98de1cb7/1efbe17e29dc4debb40a32ec7d7e1fe7 [2024-11-06 16:15:14,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-06 16:15:14,708 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-06 16:15:14,709 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-06 16:15:14,709 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-06 16:15:14,714 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-06 16:15:14,715 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 04:15:14" (1/1) ... [2024-11-06 16:15:14,715 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48767841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:14, skipping insertion in model container [2024-11-06 16:15:14,715 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 04:15:14" (1/1) ... [2024-11-06 16:15:14,766 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-06 16:15:14,945 WARN L250 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.safe_intersymbol_analog_estimation_convergence.c[1311,1324] [2024-11-06 16:15:15,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 16:15:15,139 INFO L200 MainTranslator]: Completed pre-run [2024-11-06 16:15:15,149 WARN L250 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.safe_intersymbol_analog_estimation_convergence.c[1311,1324] [2024-11-06 16:15:15,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 16:15:15,257 INFO L204 MainTranslator]: Completed translation [2024-11-06 16:15:15,258 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:15 WrapperNode [2024-11-06 16:15:15,258 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-06 16:15:15,259 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-06 16:15:15,262 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-06 16:15:15,262 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-06 16:15:15,268 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:15" (1/1) ... [2024-11-06 16:15:15,312 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:15" (1/1) ... [2024-11-06 16:15:15,366 INFO L138 Inliner]: procedures = 17, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 656 [2024-11-06 16:15:15,367 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-06 16:15:15,368 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-06 16:15:15,368 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-06 16:15:15,368 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-06 16:15:15,382 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:15" (1/1) ... [2024-11-06 16:15:15,382 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:15" (1/1) ... [2024-11-06 16:15:15,398 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:15" (1/1) ... [2024-11-06 16:15:15,425 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]. [2024-11-06 16:15:15,426 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:15" (1/1) ... [2024-11-06 16:15:15,426 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:15" (1/1) ... [2024-11-06 16:15:15,444 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:15" (1/1) ... [2024-11-06 16:15:15,447 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:15" (1/1) ... [2024-11-06 16:15:15,451 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:15" (1/1) ... [2024-11-06 16:15:15,455 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:15" (1/1) ... [2024-11-06 16:15:15,462 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-06 16:15:15,463 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-06 16:15:15,463 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-06 16:15:15,464 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-06 16:15:15,464 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:15" (1/1) ... [2024-11-06 16:15:15,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 16:15:15,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 16:15:15,516 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) [2024-11-06 16:15:15,519 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 [2024-11-06 16:15:15,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-06 16:15:15,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-06 16:15:15,547 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-06 16:15:15,547 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-06 16:15:15,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-06 16:15:15,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-06 16:15:15,750 INFO L238 CfgBuilder]: Building ICFG [2024-11-06 16:15:15,752 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-06 16:15:16,471 INFO L? ?]: Removed 267 outVars from TransFormulas that were not future-live. [2024-11-06 16:15:16,471 INFO L287 CfgBuilder]: Performing block encoding [2024-11-06 16:15:16,482 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-06 16:15:16,484 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-06 16:15:16,485 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 04:15:16 BoogieIcfgContainer [2024-11-06 16:15:16,485 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-06 16:15:16,487 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-06 16:15:16,487 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-06 16:15:16,490 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-06 16:15:16,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 04:15:14" (1/3) ... [2024-11-06 16:15:16,491 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c88e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 04:15:16, skipping insertion in model container [2024-11-06 16:15:16,492 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:15:15" (2/3) ... [2024-11-06 16:15:16,492 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c88e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 04:15:16, skipping insertion in model container [2024-11-06 16:15:16,492 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 04:15:16" (3/3) ... [2024-11-06 16:15:16,493 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.safe_intersymbol_analog_estimation_convergence.c [2024-11-06 16:15:16,509 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-06 16:15:16,510 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-06 16:15:16,575 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-06 16:15:16,583 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;@99d22f4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-06 16:15:16,583 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-06 16:15:16,587 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-06 16:15:16,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-06 16:15:16,597 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 16:15:16,598 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 16:15:16,598 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 16:15:16,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 16:15:16,605 INFO L85 PathProgramCache]: Analyzing trace with hash 896107007, now seen corresponding path program 1 times [2024-11-06 16:15:16,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 16:15:16,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636587329] [2024-11-06 16:15:16,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 16:15:16,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:16,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 16:15:16,624 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 16:15:16,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-06 16:15:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 16:15:16,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-06 16:15:16,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-06 16:15:17,365 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:17,600 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 16:15:17,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636587329] [2024-11-06 16:15:17,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636587329] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:17,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [147630246] [2024-11-06 16:15:17,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 16:15:17,602 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-06 16:15:17,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-06 16:15:17,614 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) [2024-11-06 16:15:17,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-06 16:15:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 16:15:18,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-06 16:15:18,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-06 16:15:18,237 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 16:15:18,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [147630246] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 16:15:18,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-06 16:15:18,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2024-11-06 16:15:18,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680571838] [2024-11-06 16:15:18,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 16:15:18,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-06 16:15:18,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 16:15:18,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-06 16:15:18,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-06 16:15:18,269 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-06 16:15:18,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 16:15:18,492 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2024-11-06 16:15:18,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-06 16:15:18,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-11-06 16:15:18,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 16:15:18,499 INFO L225 Difference]: With dead ends: 38 [2024-11-06 16:15:18,500 INFO L226 Difference]: Without dead ends: 22 [2024-11-06 16:15:18,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-06 16:15:18,507 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-06 16:15:18,510 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-06 16:15:18,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-06 16:15:18,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2024-11-06 16:15:18,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-06 16:15:18,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-06 16:15:18,545 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2024-11-06 16:15:18,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 16:15:18,546 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-06 16:15:18,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-06 16:15:18,547 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-06 16:15:18,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-06 16:15:18,550 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 16:15:18,550 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-06 16:15:18,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2024-11-06 16:15:18,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-06 16:15:18,951 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,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:18,952 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 16:15:18,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 16:15:18,952 INFO L85 PathProgramCache]: Analyzing trace with hash 91156387, now seen corresponding path program 1 times [2024-11-06 16:15:18,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 16:15:18,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071856652] [2024-11-06 16:15:18,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 16:15:18,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:18,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 16:15:18,956 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 16:15:18,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-06 16:15:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 16:15:19,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-06 16:15:19,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-06 16:15:19,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:19,950 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 16:15:19,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071856652] [2024-11-06 16:15:19,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071856652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:19,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [288967824] [2024-11-06 16:15:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 16:15:19,951 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-06 16:15:19,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-06 16:15:19,954 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) [2024-11-06 16:15:19,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-11-06 16:15:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 16:15:20,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-06 16:15:20,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-06 16:15:21,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:21,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [288967824] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:21,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 16:15:21,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2024-11-06 16:15:21,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071314062] [2024-11-06 16:15:21,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 16:15:21,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-06 16:15:21,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 16:15:21,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-06 16:15:21,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-06 16:15:21,174 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-06 16:15:21,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 16:15:21,591 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2024-11-06 16:15:21,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-06 16:15:21,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2024-11-06 16:15:21,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 16:15:21,592 INFO L225 Difference]: With dead ends: 31 [2024-11-06 16:15:21,592 INFO L226 Difference]: Without dead ends: 29 [2024-11-06 16:15:21,593 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-11-06 16:15:21,594 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-06 16:15:21,594 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-06 16:15:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-06 16:15:21,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2024-11-06 16:15:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-06 16:15:21,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-11-06 16:15:21,602 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2024-11-06 16:15:21,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 16:15:21,603 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-11-06 16:15:21,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-06 16:15:21,603 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-11-06 16:15:21,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-06 16:15:21,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 16:15:21,604 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2024-11-06 16:15:21,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2024-11-06 16:15:21,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-06 16:15:22,005 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,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:22,006 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 16:15:22,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 16:15:22,006 INFO L85 PathProgramCache]: Analyzing trace with hash 666109311, now seen corresponding path program 2 times [2024-11-06 16:15:22,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 16:15:22,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569184967] [2024-11-06 16:15:22,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-06 16:15:22,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:22,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 16:15:22,010 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 16:15:22,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-06 16:15:22,524 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-06 16:15:22,524 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 16:15:22,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-06 16:15:22,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-06 16:15:22,944 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:23,101 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 16:15:23,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569184967] [2024-11-06 16:15:23,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569184967] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:23,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1681399079] [2024-11-06 16:15:23,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-06 16:15:23,102 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-06 16:15:23,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-06 16:15:23,105 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) [2024-11-06 16:15:23,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-11-06 16:15:24,148 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-06 16:15:24,148 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 16:15:24,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-06 16:15:24,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-06 16:15:24,496 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:24,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1681399079] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:24,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 16:15:24,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2024-11-06 16:15:24,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166104996] [2024-11-06 16:15:24,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 16:15:24,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-06 16:15:24,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 16:15:24,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-06 16:15:24,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-06 16:15:24,637 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-06 16:15:25,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 16:15:25,134 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2024-11-06 16:15:25,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-06 16:15:25,135 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2024-11-06 16:15:25,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 16:15:25,136 INFO L225 Difference]: With dead ends: 38 [2024-11-06 16:15:25,136 INFO L226 Difference]: Without dead ends: 36 [2024-11-06 16:15:25,137 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-11-06 16:15:25,138 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-06 16:15:25,138 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 59 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-06 16:15:25,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-06 16:15:25,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2024-11-06 16:15:25,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-06 16:15:25,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-11-06 16:15:25,147 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 47 [2024-11-06 16:15:25,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 16:15:25,147 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-11-06 16:15:25,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-06 16:15:25,148 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-11-06 16:15:25,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-06 16:15:25,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 16:15:25,149 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2024-11-06 16:15:25,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-06 16:15:25,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2024-11-06 16:15:25,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-06 16:15:25,551 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 16:15:25,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 16:15:25,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1667038243, now seen corresponding path program 3 times [2024-11-06 16:15:25,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 16:15:25,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101319182] [2024-11-06 16:15:25,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-06 16:15:25,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:25,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 16:15:25,555 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 16:15:25,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-06 16:15:27,618 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-06 16:15:27,618 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 16:15:27,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-06 16:15:27,657 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:28,146 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-06 16:15:28,146 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:28,242 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 16:15:28,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101319182] [2024-11-06 16:15:28,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101319182] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:28,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [854109154] [2024-11-06 16:15:28,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-06 16:15:28,242 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-06 16:15:28,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-06 16:15:28,247 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) [2024-11-06 16:15:28,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2024-11-06 16:15:29,618 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-06 16:15:29,618 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 16:15:29,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-06 16:15:29,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-06 16:15:30,050 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:30,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [854109154] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:30,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 16:15:30,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2024-11-06 16:15:30,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526219109] [2024-11-06 16:15:30,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 16:15:30,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-06 16:15:30,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 16:15:30,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-06 16:15:30,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-06 16:15:30,163 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-06 16:15:30,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 16:15:30,941 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2024-11-06 16:15:30,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-06 16:15:30,943 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 62 [2024-11-06 16:15:30,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 16:15:30,944 INFO L225 Difference]: With dead ends: 45 [2024-11-06 16:15:30,944 INFO L226 Difference]: Without dead ends: 43 [2024-11-06 16:15:30,944 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-11-06 16:15:30,945 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-06 16:15:30,946 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 101 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-06 16:15:30,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-06 16:15:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-11-06 16:15:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 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) [2024-11-06 16:15:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2024-11-06 16:15:30,954 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 62 [2024-11-06 16:15:30,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 16:15:30,955 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2024-11-06 16:15:30,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-06 16:15:30,955 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2024-11-06 16:15:30,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-06 16:15:30,956 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 16:15:30,956 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2024-11-06 16:15:30,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2024-11-06 16:15:31,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-06 16:15:31,357 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,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:31,358 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 16:15:31,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 16:15:31,358 INFO L85 PathProgramCache]: Analyzing trace with hash 257648895, now seen corresponding path program 4 times [2024-11-06 16:15:31,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 16:15:31,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233389946] [2024-11-06 16:15:31,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-06 16:15:31,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:31,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 16:15:31,360 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 16:15:31,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-06 16:15:32,238 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-06 16:15:32,239 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 16:15:32,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-06 16:15:32,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-06 16:15:32,851 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:32,949 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 16:15:32,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233389946] [2024-11-06 16:15:32,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233389946] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:32,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1967820220] [2024-11-06 16:15:32,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-06 16:15:32,950 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-06 16:15:32,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-06 16:15:32,951 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) [2024-11-06 16:15:32,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2024-11-06 16:15:34,589 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-06 16:15:34,590 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 16:15:34,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-06 16:15:34,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-06 16:15:35,173 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:35,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1967820220] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:35,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 16:15:35,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2024-11-06 16:15:35,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965942800] [2024-11-06 16:15:35,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 16:15:35,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-06 16:15:35,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 16:15:35,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-06 16:15:35,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-06 16:15:35,269 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-06 16:15:36,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 16:15:36,740 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2024-11-06 16:15:36,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-06 16:15:36,740 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 77 [2024-11-06 16:15:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 16:15:36,741 INFO L225 Difference]: With dead ends: 52 [2024-11-06 16:15:36,742 INFO L226 Difference]: Without dead ends: 50 [2024-11-06 16:15:36,742 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-11-06 16:15:36,743 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-06 16:15:36,743 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 133 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-06 16:15:36,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-06 16:15:36,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-11-06 16:15:36,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-06 16:15:36,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2024-11-06 16:15:36,752 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 77 [2024-11-06 16:15:36,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 16:15:36,753 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2024-11-06 16:15:36,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-06 16:15:36,753 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2024-11-06 16:15:36,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-06 16:15:36,754 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 16:15:36,754 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1] [2024-11-06 16:15:36,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2024-11-06 16:15:36,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-06 16:15:37,155 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,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:37,155 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 16:15:37,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 16:15:37,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1970132829, now seen corresponding path program 5 times [2024-11-06 16:15:37,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 16:15:37,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781993272] [2024-11-06 16:15:37,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-06 16:15:37,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:15:37,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 16:15:37,159 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 16:15:37,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-06 16:15:58,890 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-06 16:15:58,891 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 16:15:58,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-06 16:15:58,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:15:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-06 16:15:59,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:15:59,702 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 16:15:59,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781993272] [2024-11-06 16:15:59,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781993272] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:15:59,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1468016786] [2024-11-06 16:15:59,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-06 16:15:59,702 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-06 16:15:59,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-06 16:15:59,704 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) [2024-11-06 16:15:59,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2024-11-06 16:16:06,847 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-06 16:16:06,847 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 16:16:06,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-06 16:16:06,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 16:16:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-06 16:16:07,485 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 16:16:07,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1468016786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 16:16:07,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 16:16:07,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2024-11-06 16:16:07,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732948144] [2024-11-06 16:16:07,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 16:16:07,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-06 16:16:07,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 16:16:07,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-06 16:16:07,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-06 16:16:07,583 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-06 16:16:09,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 16:16:09,007 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2024-11-06 16:16:09,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-06 16:16:09,008 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 92 [2024-11-06 16:16:09,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 16:16:09,009 INFO L225 Difference]: With dead ends: 59 [2024-11-06 16:16:09,009 INFO L226 Difference]: Without dead ends: 57 [2024-11-06 16:16:09,009 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-11-06 16:16:09,010 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-06 16:16:09,010 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 186 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-06 16:16:09,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-06 16:16:09,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-11-06 16:16:09,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 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) [2024-11-06 16:16:09,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2024-11-06 16:16:09,023 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 92 [2024-11-06 16:16:09,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 16:16:09,024 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2024-11-06 16:16:09,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-06 16:16:09,024 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2024-11-06 16:16:09,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-06 16:16:09,025 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 16:16:09,025 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1] [2024-11-06 16:16:09,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-06 16:16:09,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2024-11-06 16:16:09,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-06 16:16:09,426 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 16:16:09,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 16:16:09,427 INFO L85 PathProgramCache]: Analyzing trace with hash -761811841, now seen corresponding path program 6 times [2024-11-06 16:16:09,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 16:16:09,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540990187] [2024-11-06 16:16:09,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-06 16:16:09,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 16:16:09,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 16:16:09,430 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 16:16:09,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-06 16:16:17,974 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-06 16:16:17,974 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 16:16:18,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 688 conjuncts are in the unsatisfiable core [2024-11-06 16:16:18,102 INFO L278 TraceCheckSpWp]: Computing forward predicates...