/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 bitwuzla -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-03 13:37:22,043 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-03 13:37:22,095 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-03 13:37:22,098 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-03 13:37:22,098 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-03 13:37:22,121 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-03 13:37:22,121 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-03 13:37:22,122 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-03 13:37:22,123 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-03 13:37:22,123 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-03 13:37:22,124 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-03 13:37:22,124 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-03 13:37:22,124 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-03 13:37:22,125 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-03 13:37:22,125 INFO L153 SettingsManager]: * Use SBE=true [2024-11-03 13:37:22,125 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-03 13:37:22,127 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-03 13:37:22,127 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-03 13:37:22,127 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-03 13:37:22,127 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-03 13:37:22,127 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-03 13:37:22,130 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-03 13:37:22,130 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-03 13:37:22,130 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-03 13:37:22,131 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-03 13:37:22,131 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-03 13:37:22,131 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-03 13:37:22,131 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-03 13:37:22,131 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-03 13:37:22,131 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-03 13:37:22,131 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-03 13:37:22,132 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-03 13:37:22,132 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-03 13:37:22,132 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-03 13:37:22,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 13:37:22,132 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-03 13:37:22,132 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-03 13:37:22,132 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-03 13:37:22,133 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-03 13:37:22,133 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-03 13:37:22,133 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-03 13:37:22,133 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-03 13:37:22,133 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-03 13:37:22,133 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-03 13:37:22,134 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> bitwuzla [2024-11-03 13:37:22,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-03 13:37:22,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-03 13:37:22,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-03 13:37:22,383 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-03 13:37:22,383 INFO L274 PluginConnector]: CDTParser initialized [2024-11-03 13:37:22,384 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c [2024-11-03 13:37:23,707 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-03 13:37:23,904 INFO L384 CDTParser]: Found 1 translation units. [2024-11-03 13:37:23,905 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c [2024-11-03 13:37:23,912 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/457f7646d/0d0cbcd321044160ad3b96ee2e63f0fd/FLAG22de58ac4 [2024-11-03 13:37:24,310 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/457f7646d/0d0cbcd321044160ad3b96ee2e63f0fd [2024-11-03 13:37:24,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-03 13:37:24,313 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-03 13:37:24,315 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-03 13:37:24,315 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-03 13:37:24,319 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-03 13:37:24,320 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:37:24" (1/1) ... [2024-11-03 13:37:24,321 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@303fb837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:24, skipping insertion in model container [2024-11-03 13:37:24,321 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:37:24" (1/1) ... [2024-11-03 13:37:24,347 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-03 13:37:24,490 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c[755,768] [2024-11-03 13:37:24,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 13:37:24,550 INFO L200 MainTranslator]: Completed pre-run [2024-11-03 13:37:24,559 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c[755,768] [2024-11-03 13:37:24,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 13:37:24,598 INFO L204 MainTranslator]: Completed translation [2024-11-03 13:37:24,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:24 WrapperNode [2024-11-03 13:37:24,598 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-03 13:37:24,599 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-03 13:37:24,599 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-03 13:37:24,599 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-03 13:37:24,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:24" (1/1) ... [2024-11-03 13:37:24,612 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:24" (1/1) ... [2024-11-03 13:37:24,629 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 149 [2024-11-03 13:37:24,630 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-03 13:37:24,630 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-03 13:37:24,630 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-03 13:37:24,630 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-03 13:37:24,638 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:24" (1/1) ... [2024-11-03 13:37:24,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:24" (1/1) ... [2024-11-03 13:37:24,641 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:24" (1/1) ... [2024-11-03 13:37:24,659 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]. [2024-11-03 13:37:24,659 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:24" (1/1) ... [2024-11-03 13:37:24,660 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:24" (1/1) ... [2024-11-03 13:37:24,667 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:24" (1/1) ... [2024-11-03 13:37:24,669 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:24" (1/1) ... [2024-11-03 13:37:24,671 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:24" (1/1) ... [2024-11-03 13:37:24,672 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:24" (1/1) ... [2024-11-03 13:37:24,674 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-03 13:37:24,678 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-03 13:37:24,679 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-03 13:37:24,679 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-03 13:37:24,679 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:24" (1/1) ... [2024-11-03 13:37:24,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 13:37:24,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 13:37:24,716 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) [2024-11-03 13:37:24,724 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 [2024-11-03 13:37:24,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-03 13:37:24,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-03 13:37:24,743 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-03 13:37:24,743 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-03 13:37:24,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-03 13:37:24,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-03 13:37:24,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-03 13:37:24,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-03 13:37:24,814 INFO L238 CfgBuilder]: Building ICFG [2024-11-03 13:37:24,815 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-03 13:37:25,124 INFO L? ?]: Removed 55 outVars from TransFormulas that were not future-live. [2024-11-03 13:37:25,124 INFO L287 CfgBuilder]: Performing block encoding [2024-11-03 13:37:25,136 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-03 13:37:25,136 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-03 13:37:25,136 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:37:25 BoogieIcfgContainer [2024-11-03 13:37:25,137 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-03 13:37:25,138 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-03 13:37:25,138 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-03 13:37:25,141 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-03 13:37:25,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:37:24" (1/3) ... [2024-11-03 13:37:25,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3209f221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:37:25, skipping insertion in model container [2024-11-03 13:37:25,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:24" (2/3) ... [2024-11-03 13:37:25,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3209f221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:37:25, skipping insertion in model container [2024-11-03 13:37:25,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:37:25" (3/3) ... [2024-11-03 13:37:25,143 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2024-11-03 13:37:25,154 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-03 13:37:25,155 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-03 13:37:25,195 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-03 13:37:25,200 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;@109ce92e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-03 13:37:25,200 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-03 13:37:25,203 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 60 states have (on average 1.6) internal successors, (96), 63 states have internal predecessors, (96), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-03 13:37:25,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-03 13:37:25,209 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:37:25,209 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:37:25,210 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:37:25,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:37:25,214 INFO L85 PathProgramCache]: Analyzing trace with hash -760882007, now seen corresponding path program 1 times [2024-11-03 13:37:25,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:37:25,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48632708] [2024-11-03 13:37:25,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:37:25,222 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:37:25,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:25,226 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:37:25,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (2)] Waiting until timeout for monitored process [2024-11-03 13:37:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:37:25,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-03 13:37:25,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:37:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 13:37:25,480 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:37:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 13:37:25,566 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:37:25,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48632708] [2024-11-03 13:37:25,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [48632708] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 13:37:25,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 13:37:25,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2024-11-03 13:37:25,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430281958] [2024-11-03 13:37:25,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 13:37:25,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-03 13:37:25,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:37:25,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-03 13:37:25,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-03 13:37:25,600 INFO L87 Difference]: Start difference. First operand has 72 states, 60 states have (on average 1.6) internal successors, (96), 63 states have internal predecessors, (96), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-03 13:37:25,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:37:25,767 INFO L93 Difference]: Finished difference Result 164 states and 272 transitions. [2024-11-03 13:37:25,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-03 13:37:25,771 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 32 [2024-11-03 13:37:25,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:37:25,779 INFO L225 Difference]: With dead ends: 164 [2024-11-03 13:37:25,779 INFO L226 Difference]: Without dead ends: 91 [2024-11-03 13:37:25,783 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-03 13:37:25,785 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 14 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 13:37:25,787 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 673 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 13:37:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-03 13:37:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2024-11-03 13:37:25,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 71 states have internal predecessors, (100), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2024-11-03 13:37:25,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 127 transitions. [2024-11-03 13:37:25,820 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 127 transitions. Word has length 32 [2024-11-03 13:37:25,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:37:25,820 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 127 transitions. [2024-11-03 13:37:25,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-03 13:37:25,821 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 127 transitions. [2024-11-03 13:37:25,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-03 13:37:25,822 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:37:25,823 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:37:25,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (2)] Ended with exit code 0 [2024-11-03 13:37:26,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:26,025 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:37:26,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:37:26,025 INFO L85 PathProgramCache]: Analyzing trace with hash 975798983, now seen corresponding path program 1 times [2024-11-03 13:37:26,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:37:26,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610366711] [2024-11-03 13:37:26,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:37:26,026 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:37:26,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:26,028 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:37:26,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (3)] Waiting until timeout for monitored process [2024-11-03 13:37:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:37:26,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-03 13:37:26,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:37:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 13:37:26,140 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:37:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 13:37:26,202 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:37:26,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610366711] [2024-11-03 13:37:26,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1610366711] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-03 13:37:26,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-03 13:37:26,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2024-11-03 13:37:26,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149051517] [2024-11-03 13:37:26,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-03 13:37:26,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-03 13:37:26,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:37:26,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-03 13:37:26,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-03 13:37:26,205 INFO L87 Difference]: Start difference. First operand 85 states and 127 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:26,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:37:26,293 INFO L93 Difference]: Finished difference Result 141 states and 209 transitions. [2024-11-03 13:37:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-03 13:37:26,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2024-11-03 13:37:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:37:26,298 INFO L225 Difference]: With dead ends: 141 [2024-11-03 13:37:26,298 INFO L226 Difference]: Without dead ends: 99 [2024-11-03 13:37:26,298 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-03 13:37:26,299 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 2 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 13:37:26,301 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 440 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 13:37:26,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-03 13:37:26,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-11-03 13:37:26,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 84 states have (on average 1.4047619047619047) internal successors, (118), 82 states have internal predecessors, (118), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (16), 15 states have call predecessors, (16), 10 states have call successors, (16) [2024-11-03 13:37:26,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 145 transitions. [2024-11-03 13:37:26,314 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 145 transitions. Word has length 36 [2024-11-03 13:37:26,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:37:26,315 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 145 transitions. [2024-11-03 13:37:26,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:26,315 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 145 transitions. [2024-11-03 13:37:26,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-03 13:37:26,319 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:37:26,319 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:37:26,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (3)] Forceful destruction successful, exit code 0 [2024-11-03 13:37:26,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:26,520 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:37:26,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:37:26,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1655857353, now seen corresponding path program 1 times [2024-11-03 13:37:26,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:37:26,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212895456] [2024-11-03 13:37:26,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:37:26,521 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:37:26,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:26,524 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:37:26,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (4)] Waiting until timeout for monitored process [2024-11-03 13:37:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:37:26,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-03 13:37:26,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:37:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 13:37:26,729 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:37:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 13:37:26,814 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:37:26,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212895456] [2024-11-03 13:37:26,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [212895456] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 13:37:26,815 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 13:37:26,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 7] imperfect sequences [] total 12 [2024-11-03 13:37:26,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725009012] [2024-11-03 13:37:26,815 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 13:37:26,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-03 13:37:26,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:37:26,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-03 13:37:26,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-03 13:37:26,817 INFO L87 Difference]: Start difference. First operand 99 states and 145 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-03 13:37:27,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:37:27,136 INFO L93 Difference]: Finished difference Result 248 states and 379 transitions. [2024-11-03 13:37:27,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-03 13:37:27,136 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-11-03 13:37:27,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:37:27,138 INFO L225 Difference]: With dead ends: 248 [2024-11-03 13:37:27,138 INFO L226 Difference]: Without dead ends: 200 [2024-11-03 13:37:27,139 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-03 13:37:27,139 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 157 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-03 13:37:27,140 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 659 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-03 13:37:27,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-11-03 13:37:27,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 161. [2024-11-03 13:37:27,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 140 states have (on average 1.3785714285714286) internal successors, (193), 137 states have internal predecessors, (193), 17 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (23), 23 states have call predecessors, (23), 16 states have call successors, (23) [2024-11-03 13:37:27,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 233 transitions. [2024-11-03 13:37:27,153 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 233 transitions. Word has length 36 [2024-11-03 13:37:27,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:37:27,156 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 233 transitions. [2024-11-03 13:37:27,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-03 13:37:27,157 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 233 transitions. [2024-11-03 13:37:27,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-03 13:37:27,158 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:37:27,158 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:37:27,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (4)] Ended with exit code 0 [2024-11-03 13:37:27,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:27,359 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:37:27,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:37:27,360 INFO L85 PathProgramCache]: Analyzing trace with hash -371678158, now seen corresponding path program 1 times [2024-11-03 13:37:27,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:37:27,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169370818] [2024-11-03 13:37:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:37:27,360 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:37:27,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:27,364 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:37:27,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (5)] Waiting until timeout for monitored process [2024-11-03 13:37:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:37:27,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-03 13:37:27,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:37:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 13:37:27,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:37:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 13:37:27,498 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:37:27,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169370818] [2024-11-03 13:37:27,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [169370818] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 13:37:27,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 13:37:27,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-03 13:37:27,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000983261] [2024-11-03 13:37:27,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 13:37:27,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-03 13:37:27,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:37:27,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-03 13:37:27,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-03 13:37:27,500 INFO L87 Difference]: Start difference. First operand 161 states and 233 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-03 13:37:27,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:37:27,618 INFO L93 Difference]: Finished difference Result 192 states and 278 transitions. [2024-11-03 13:37:27,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-03 13:37:27,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2024-11-03 13:37:27,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:37:27,620 INFO L225 Difference]: With dead ends: 192 [2024-11-03 13:37:27,620 INFO L226 Difference]: Without dead ends: 154 [2024-11-03 13:37:27,620 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-03 13:37:27,621 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 28 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 13:37:27,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 590 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 13:37:27,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-03 13:37:27,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2024-11-03 13:37:27,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 133 states have (on average 1.368421052631579) internal successors, (182), 130 states have internal predecessors, (182), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (21), 21 states have call predecessors, (21), 14 states have call successors, (21) [2024-11-03 13:37:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 218 transitions. [2024-11-03 13:37:27,629 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 218 transitions. Word has length 40 [2024-11-03 13:37:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:37:27,630 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 218 transitions. [2024-11-03 13:37:27,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-03 13:37:27,630 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 218 transitions. [2024-11-03 13:37:27,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-03 13:37:27,631 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:37:27,631 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:37:27,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (5)] Forceful destruction successful, exit code 0 [2024-11-03 13:37:27,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:27,832 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:37:27,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:37:27,833 INFO L85 PathProgramCache]: Analyzing trace with hash -280935876, now seen corresponding path program 1 times [2024-11-03 13:37:27,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:37:27,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423910167] [2024-11-03 13:37:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:37:27,833 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:37:27,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:27,835 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:37:27,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (6)] Waiting until timeout for monitored process [2024-11-03 13:37:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:37:27,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-03 13:37:27,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:37:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 13:37:27,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:37:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 13:37:27,941 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:37:27,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423910167] [2024-11-03 13:37:27,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [423910167] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 13:37:27,942 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 13:37:27,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2024-11-03 13:37:27,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539808799] [2024-11-03 13:37:27,942 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 13:37:27,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-03 13:37:27,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:37:27,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-03 13:37:27,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-03 13:37:27,943 INFO L87 Difference]: Start difference. First operand 152 states and 218 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:28,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:37:28,017 INFO L93 Difference]: Finished difference Result 218 states and 321 transitions. [2024-11-03 13:37:28,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-03 13:37:28,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-03 13:37:28,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:37:28,018 INFO L225 Difference]: With dead ends: 218 [2024-11-03 13:37:28,018 INFO L226 Difference]: Without dead ends: 180 [2024-11-03 13:37:28,019 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-03 13:37:28,019 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 32 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 13:37:28,020 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 511 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 13:37:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-03 13:37:28,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2024-11-03 13:37:28,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 156 states have (on average 1.3846153846153846) internal successors, (216), 155 states have internal predecessors, (216), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2024-11-03 13:37:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 258 transitions. [2024-11-03 13:37:28,028 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 258 transitions. Word has length 40 [2024-11-03 13:37:28,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:37:28,028 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 258 transitions. [2024-11-03 13:37:28,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:28,028 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 258 transitions. [2024-11-03 13:37:28,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-03 13:37:28,029 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:37:28,029 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:37:28,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (6)] Ended with exit code 0 [2024-11-03 13:37:28,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:28,230 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:37:28,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:37:28,231 INFO L85 PathProgramCache]: Analyzing trace with hash -2082074321, now seen corresponding path program 1 times [2024-11-03 13:37:28,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:37:28,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625709853] [2024-11-03 13:37:28,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:37:28,231 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:37:28,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:28,233 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:37:28,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (7)] Waiting until timeout for monitored process [2024-11-03 13:37:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:37:28,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-03 13:37:28,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:37:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 13:37:28,323 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:37:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 13:37:28,351 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:37:28,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625709853] [2024-11-03 13:37:28,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [625709853] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 13:37:28,351 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 13:37:28,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-11-03 13:37:28,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920992372] [2024-11-03 13:37:28,351 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 13:37:28,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-03 13:37:28,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:37:28,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-03 13:37:28,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-03 13:37:28,352 INFO L87 Difference]: Start difference. First operand 178 states and 258 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:37:28,386 INFO L93 Difference]: Finished difference Result 310 states and 451 transitions. [2024-11-03 13:37:28,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-03 13:37:28,386 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-03 13:37:28,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:37:28,387 INFO L225 Difference]: With dead ends: 310 [2024-11-03 13:37:28,387 INFO L226 Difference]: Without dead ends: 244 [2024-11-03 13:37:28,388 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-03 13:37:28,388 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 31 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 13:37:28,389 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 481 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 13:37:28,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2024-11-03 13:37:28,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2024-11-03 13:37:28,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 220 states have (on average 1.3227272727272728) internal successors, (291), 217 states have internal predecessors, (291), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2024-11-03 13:37:28,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 333 transitions. [2024-11-03 13:37:28,409 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 333 transitions. Word has length 43 [2024-11-03 13:37:28,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:37:28,409 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 333 transitions. [2024-11-03 13:37:28,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:28,409 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 333 transitions. [2024-11-03 13:37:28,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-03 13:37:28,412 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:37:28,412 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:37:28,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (7)] Ended with exit code 0 [2024-11-03 13:37:28,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:28,614 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:37:28,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:37:28,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1563397194, now seen corresponding path program 1 times [2024-11-03 13:37:28,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:37:28,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896520330] [2024-11-03 13:37:28,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:37:28,615 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:37:28,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:28,616 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:37:28,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (8)] Waiting until timeout for monitored process [2024-11-03 13:37:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:37:28,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-03 13:37:28,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:37:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-03 13:37:28,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:37:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 13:37:28,808 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:37:28,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896520330] [2024-11-03 13:37:28,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [896520330] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-03 13:37:28,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-03 13:37:28,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-03 13:37:28,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620454711] [2024-11-03 13:37:28,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-03 13:37:28,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-03 13:37:28,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:37:28,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-03 13:37:28,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-03 13:37:28,809 INFO L87 Difference]: Start difference. First operand 242 states and 333 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:28,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:37:28,939 INFO L93 Difference]: Finished difference Result 349 states and 487 transitions. [2024-11-03 13:37:28,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-03 13:37:28,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-03 13:37:28,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:37:28,941 INFO L225 Difference]: With dead ends: 349 [2024-11-03 13:37:28,941 INFO L226 Difference]: Without dead ends: 313 [2024-11-03 13:37:28,942 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-03 13:37:28,942 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 25 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 13:37:28,943 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 432 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 13:37:28,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2024-11-03 13:37:28,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 295. [2024-11-03 13:37:28,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 268 states have (on average 1.3097014925373134) internal successors, (351), 266 states have internal predecessors, (351), 23 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (29), 29 states have call predecessors, (29), 22 states have call successors, (29) [2024-11-03 13:37:28,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 403 transitions. [2024-11-03 13:37:28,953 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 403 transitions. Word has length 44 [2024-11-03 13:37:28,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:37:28,953 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 403 transitions. [2024-11-03 13:37:28,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:28,953 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 403 transitions. [2024-11-03 13:37:28,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-03 13:37:28,954 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:37:28,954 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:37:28,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (8)] Ended with exit code 0 [2024-11-03 13:37:29,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:29,155 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:37:29,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:37:29,155 INFO L85 PathProgramCache]: Analyzing trace with hash -956562740, now seen corresponding path program 1 times [2024-11-03 13:37:29,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:37:29,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899375167] [2024-11-03 13:37:29,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:37:29,155 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:37:29,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:29,159 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:37:29,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (9)] Waiting until timeout for monitored process [2024-11-03 13:37:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:37:29,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-03 13:37:29,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:37:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 13:37:29,202 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:37:29,231 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 13:37:29,231 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:37:29,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899375167] [2024-11-03 13:37:29,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [899375167] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 13:37:29,231 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 13:37:29,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2024-11-03 13:37:29,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364914158] [2024-11-03 13:37:29,231 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 13:37:29,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-03 13:37:29,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:37:29,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-03 13:37:29,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-03 13:37:29,232 INFO L87 Difference]: Start difference. First operand 295 states and 403 transitions. Second operand has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:29,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:37:29,258 INFO L93 Difference]: Finished difference Result 302 states and 409 transitions. [2024-11-03 13:37:29,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-03 13:37:29,259 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-03 13:37:29,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:37:29,260 INFO L225 Difference]: With dead ends: 302 [2024-11-03 13:37:29,260 INFO L226 Difference]: Without dead ends: 295 [2024-11-03 13:37:29,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-03 13:37:29,261 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 3 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 13:37:29,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 577 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 13:37:29,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-11-03 13:37:29,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2024-11-03 13:37:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 268 states have (on average 1.2985074626865671) internal successors, (348), 266 states have internal predecessors, (348), 23 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (29), 29 states have call predecessors, (29), 22 states have call successors, (29) [2024-11-03 13:37:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 400 transitions. [2024-11-03 13:37:29,273 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 400 transitions. Word has length 44 [2024-11-03 13:37:29,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:37:29,273 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 400 transitions. [2024-11-03 13:37:29,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:29,273 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 400 transitions. [2024-11-03 13:37:29,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-03 13:37:29,274 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:37:29,274 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:37:29,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (9)] Ended with exit code 0 [2024-11-03 13:37:29,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:29,475 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:37:29,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:37:29,476 INFO L85 PathProgramCache]: Analyzing trace with hash -3100185, now seen corresponding path program 2 times [2024-11-03 13:37:29,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:37:29,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344238582] [2024-11-03 13:37:29,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:37:29,476 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:37:29,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:29,477 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:37:29,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (10)] Waiting until timeout for monitored process [2024-11-03 13:37:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:37:29,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-03 13:37:29,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:37:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-03 13:37:29,589 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:37:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-03 13:37:29,705 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:37:29,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344238582] [2024-11-03 13:37:29,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1344238582] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-03 13:37:29,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-03 13:37:29,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 11 [2024-11-03 13:37:29,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894415534] [2024-11-03 13:37:29,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-03 13:37:29,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-03 13:37:29,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:37:29,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-03 13:37:29,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-03 13:37:29,707 INFO L87 Difference]: Start difference. First operand 295 states and 400 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-03 13:37:29,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:37:29,901 INFO L93 Difference]: Finished difference Result 369 states and 495 transitions. [2024-11-03 13:37:29,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-03 13:37:29,901 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 44 [2024-11-03 13:37:29,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:37:29,903 INFO L225 Difference]: With dead ends: 369 [2024-11-03 13:37:29,903 INFO L226 Difference]: Without dead ends: 328 [2024-11-03 13:37:29,903 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-03 13:37:29,904 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 23 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 13:37:29,904 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 796 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 13:37:29,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2024-11-03 13:37:29,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 291. [2024-11-03 13:37:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 264 states have (on average 1.303030303030303) internal successors, (344), 262 states have internal predecessors, (344), 23 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (29), 29 states have call predecessors, (29), 22 states have call successors, (29) [2024-11-03 13:37:29,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 396 transitions. [2024-11-03 13:37:29,913 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 396 transitions. Word has length 44 [2024-11-03 13:37:29,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:37:29,913 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 396 transitions. [2024-11-03 13:37:29,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-03 13:37:29,913 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 396 transitions. [2024-11-03 13:37:29,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-03 13:37:29,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:37:29,914 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:37:29,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (10)] Ended with exit code 0 [2024-11-03 13:37:30,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:30,117 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:37:30,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:37:30,117 INFO L85 PathProgramCache]: Analyzing trace with hash -261265623, now seen corresponding path program 1 times [2024-11-03 13:37:30,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:37:30,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158180379] [2024-11-03 13:37:30,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:37:30,118 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:37:30,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:30,119 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:37:30,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (11)] Waiting until timeout for monitored process [2024-11-03 13:37:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:37:30,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-03 13:37:30,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:37:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 13:37:30,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:37:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 13:37:30,352 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:37:30,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158180379] [2024-11-03 13:37:30,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [158180379] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 13:37:30,352 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 13:37:30,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-11-03 13:37:30,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482142866] [2024-11-03 13:37:30,352 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 13:37:30,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-03 13:37:30,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:37:30,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-03 13:37:30,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-03 13:37:30,353 INFO L87 Difference]: Start difference. First operand 291 states and 396 transitions. Second operand has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:37:31,157 INFO L93 Difference]: Finished difference Result 297 states and 401 transitions. [2024-11-03 13:37:31,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-03 13:37:31,157 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-03 13:37:31,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:37:31,159 INFO L225 Difference]: With dead ends: 297 [2024-11-03 13:37:31,159 INFO L226 Difference]: Without dead ends: 295 [2024-11-03 13:37:31,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-03 13:37:31,159 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 3 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-03 13:37:31,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 642 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-03 13:37:31,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-11-03 13:37:31,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2024-11-03 13:37:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 267 states have (on average 1.299625468164794) internal successors, (347), 265 states have internal predecessors, (347), 23 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (29), 29 states have call predecessors, (29), 22 states have call successors, (29) [2024-11-03 13:37:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 399 transitions. [2024-11-03 13:37:31,175 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 399 transitions. Word has length 44 [2024-11-03 13:37:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:37:31,176 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 399 transitions. [2024-11-03 13:37:31,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:31,176 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 399 transitions. [2024-11-03 13:37:31,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-03 13:37:31,177 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:37:31,177 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:37:31,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (11)] Ended with exit code 0 [2024-11-03 13:37:31,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:31,379 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:37:31,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:37:31,380 INFO L85 PathProgramCache]: Analyzing trace with hash 561980754, now seen corresponding path program 1 times [2024-11-03 13:37:31,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:37:31,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110071507] [2024-11-03 13:37:31,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:37:31,380 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:37:31,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:31,384 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:37:31,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (12)] Waiting until timeout for monitored process [2024-11-03 13:37:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:37:31,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-03 13:37:31,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:37:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 13:37:31,474 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:37:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 13:37:31,515 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:37:31,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110071507] [2024-11-03 13:37:31,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2110071507] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 13:37:31,515 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 13:37:31,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-11-03 13:37:31,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836894241] [2024-11-03 13:37:31,516 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 13:37:31,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-03 13:37:31,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:37:31,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-03 13:37:31,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-03 13:37:31,517 INFO L87 Difference]: Start difference. First operand 295 states and 399 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:31,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:37:31,558 INFO L93 Difference]: Finished difference Result 631 states and 850 transitions. [2024-11-03 13:37:31,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-03 13:37:31,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-03 13:37:31,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:37:31,561 INFO L225 Difference]: With dead ends: 631 [2024-11-03 13:37:31,561 INFO L226 Difference]: Without dead ends: 579 [2024-11-03 13:37:31,562 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-03 13:37:31,564 INFO L432 NwaCegarLoop]: 134 mSDtfsCounter, 56 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 13:37:31,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 525 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 13:37:31,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2024-11-03 13:37:31,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 314. [2024-11-03 13:37:31,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 285 states have (on average 1.3017543859649123) internal successors, (371), 282 states have internal predecessors, (371), 24 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (30), 30 states have call predecessors, (30), 23 states have call successors, (30) [2024-11-03 13:37:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 425 transitions. [2024-11-03 13:37:31,587 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 425 transitions. Word has length 45 [2024-11-03 13:37:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:37:31,587 INFO L471 AbstractCegarLoop]: Abstraction has 314 states and 425 transitions. [2024-11-03 13:37:31,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:31,587 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 425 transitions. [2024-11-03 13:37:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-03 13:37:31,588 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:37:31,588 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:37:31,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (12)] Ended with exit code 0 [2024-11-03 13:37:31,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:31,791 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:37:31,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:37:31,792 INFO L85 PathProgramCache]: Analyzing trace with hash 2079579127, now seen corresponding path program 1 times [2024-11-03 13:37:31,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:37:31,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074070726] [2024-11-03 13:37:31,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:37:31,792 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:37:31,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:31,796 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:37:31,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (13)] Waiting until timeout for monitored process [2024-11-03 13:37:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:37:31,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-03 13:37:31,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:37:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 13:37:31,884 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:37:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 13:37:31,895 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:37:31,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074070726] [2024-11-03 13:37:31,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1074070726] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 13:37:31,895 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 13:37:31,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2024-11-03 13:37:31,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584922525] [2024-11-03 13:37:31,896 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 13:37:31,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-03 13:37:31,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:37:31,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-03 13:37:31,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-03 13:37:31,896 INFO L87 Difference]: Start difference. First operand 314 states and 425 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:31,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:37:31,914 INFO L93 Difference]: Finished difference Result 329 states and 441 transitions. [2024-11-03 13:37:31,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-03 13:37:31,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-11-03 13:37:31,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:37:31,916 INFO L225 Difference]: With dead ends: 329 [2024-11-03 13:37:31,916 INFO L226 Difference]: Without dead ends: 268 [2024-11-03 13:37:31,916 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-03 13:37:31,917 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 0 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 13:37:31,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 288 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 13:37:31,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-11-03 13:37:31,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2024-11-03 13:37:31,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 239 states have (on average 1.3138075313807531) internal successors, (314), 238 states have internal predecessors, (314), 24 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (28), 28 states have call predecessors, (28), 23 states have call successors, (28) [2024-11-03 13:37:31,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 366 transitions. [2024-11-03 13:37:31,926 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 366 transitions. Word has length 48 [2024-11-03 13:37:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:37:31,926 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 366 transitions. [2024-11-03 13:37:31,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:31,926 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 366 transitions. [2024-11-03 13:37:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-03 13:37:31,927 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:37:31,927 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:37:31,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (13)] Ended with exit code 0 [2024-11-03 13:37:32,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:32,128 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:37:32,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:37:32,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1609971577, now seen corresponding path program 1 times [2024-11-03 13:37:32,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:37:32,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7856466] [2024-11-03 13:37:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:37:32,128 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:37:32,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:32,134 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:37:32,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (14)] Waiting until timeout for monitored process [2024-11-03 13:37:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:37:32,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-03 13:37:32,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:37:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-03 13:37:32,290 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:37:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 13:37:32,338 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:37:32,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7856466] [2024-11-03 13:37:32,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [7856466] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-03 13:37:32,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-03 13:37:32,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 9 [2024-11-03 13:37:32,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515107152] [2024-11-03 13:37:32,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-03 13:37:32,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-03 13:37:32,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:37:32,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-03 13:37:32,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-03 13:37:32,339 INFO L87 Difference]: Start difference. First operand 268 states and 366 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:32,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:37:32,430 INFO L93 Difference]: Finished difference Result 336 states and 461 transitions. [2024-11-03 13:37:32,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-03 13:37:32,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-11-03 13:37:32,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:37:32,431 INFO L225 Difference]: With dead ends: 336 [2024-11-03 13:37:32,431 INFO L226 Difference]: Without dead ends: 294 [2024-11-03 13:37:32,432 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-03 13:37:32,432 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 50 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 13:37:32,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 407 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 13:37:32,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2024-11-03 13:37:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 268. [2024-11-03 13:37:32,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 239 states have (on average 1.3054393305439331) internal successors, (312), 238 states have internal predecessors, (312), 24 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (28), 28 states have call predecessors, (28), 23 states have call successors, (28) [2024-11-03 13:37:32,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 364 transitions. [2024-11-03 13:37:32,440 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 364 transitions. Word has length 49 [2024-11-03 13:37:32,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:37:32,440 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 364 transitions. [2024-11-03 13:37:32,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:32,440 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 364 transitions. [2024-11-03 13:37:32,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-03 13:37:32,441 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:37:32,441 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:37:32,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (14)] Ended with exit code 0 [2024-11-03 13:37:32,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:32,643 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:37:32,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:37:32,643 INFO L85 PathProgramCache]: Analyzing trace with hash -908906999, now seen corresponding path program 1 times [2024-11-03 13:37:32,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:37:32,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023198515] [2024-11-03 13:37:32,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:37:32,644 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:37:32,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:32,645 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:37:32,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (15)] Waiting until timeout for monitored process [2024-11-03 13:37:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:37:32,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-03 13:37:32,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:37:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 13:37:32,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:37:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 13:37:32,766 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:37:32,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023198515] [2024-11-03 13:37:32,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1023198515] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 13:37:32,766 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 13:37:32,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-11-03 13:37:32,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024477185] [2024-11-03 13:37:32,766 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 13:37:32,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-03 13:37:32,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:37:32,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-03 13:37:32,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-03 13:37:32,767 INFO L87 Difference]: Start difference. First operand 268 states and 364 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:33,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:37:33,018 INFO L93 Difference]: Finished difference Result 355 states and 480 transitions. [2024-11-03 13:37:33,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-03 13:37:33,019 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-11-03 13:37:33,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:37:33,020 INFO L225 Difference]: With dead ends: 355 [2024-11-03 13:37:33,020 INFO L226 Difference]: Without dead ends: 277 [2024-11-03 13:37:33,021 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-03 13:37:33,021 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 51 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-03 13:37:33,021 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 651 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-03 13:37:33,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-11-03 13:37:33,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 227. [2024-11-03 13:37:33,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 196 states have (on average 1.3112244897959184) internal successors, (257), 197 states have internal predecessors, (257), 26 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (27), 27 states have call predecessors, (27), 24 states have call successors, (27) [2024-11-03 13:37:33,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 310 transitions. [2024-11-03 13:37:33,029 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 310 transitions. Word has length 49 [2024-11-03 13:37:33,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:37:33,030 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 310 transitions. [2024-11-03 13:37:33,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:33,030 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 310 transitions. [2024-11-03 13:37:33,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-03 13:37:33,030 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:37:33,031 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:37:33,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (15)] Forceful destruction successful, exit code 0 [2024-11-03 13:37:33,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:33,232 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:37:33,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:37:33,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1552744902, now seen corresponding path program 1 times [2024-11-03 13:37:33,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:37:33,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631160369] [2024-11-03 13:37:33,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:37:33,233 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:37:33,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:33,234 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:37:33,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (16)] Waiting until timeout for monitored process [2024-11-03 13:37:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:37:33,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-03 13:37:33,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:37:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 13:37:33,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:37:33,382 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 13:37:33,382 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:37:33,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631160369] [2024-11-03 13:37:33,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1631160369] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 13:37:33,382 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 13:37:33,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2024-11-03 13:37:33,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031367856] [2024-11-03 13:37:33,382 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 13:37:33,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-03 13:37:33,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:37:33,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-03 13:37:33,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-03 13:37:33,383 INFO L87 Difference]: Start difference. First operand 227 states and 310 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:37:33,743 INFO L93 Difference]: Finished difference Result 344 states and 468 transitions. [2024-11-03 13:37:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-03 13:37:33,743 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-03 13:37:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:37:33,745 INFO L225 Difference]: With dead ends: 344 [2024-11-03 13:37:33,745 INFO L226 Difference]: Without dead ends: 323 [2024-11-03 13:37:33,745 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2024-11-03 13:37:33,745 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 65 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-03 13:37:33,746 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 667 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-03 13:37:33,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-11-03 13:37:33,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 286. [2024-11-03 13:37:33,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 247 states have (on average 1.2834008097165992) internal successors, (317), 249 states have internal predecessors, (317), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (35), 35 states have call predecessors, (35), 32 states have call successors, (35) [2024-11-03 13:37:33,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 386 transitions. [2024-11-03 13:37:33,777 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 386 transitions. Word has length 50 [2024-11-03 13:37:33,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:37:33,777 INFO L471 AbstractCegarLoop]: Abstraction has 286 states and 386 transitions. [2024-11-03 13:37:33,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:33,777 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 386 transitions. [2024-11-03 13:37:33,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-03 13:37:33,778 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:37:33,778 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:37:33,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (16)] Ended with exit code 0 [2024-11-03 13:37:33,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:33,979 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:37:33,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:37:33,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1555222541, now seen corresponding path program 1 times [2024-11-03 13:37:33,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:37:33,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143261695] [2024-11-03 13:37:33,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:37:33,979 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:37:33,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:33,982 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:37:33,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (17)] Waiting until timeout for monitored process [2024-11-03 13:37:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:37:34,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-03 13:37:34,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:37:34,036 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 13:37:34,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:37:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 13:37:34,071 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:37:34,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143261695] [2024-11-03 13:37:34,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1143261695] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 13:37:34,071 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 13:37:34,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-11-03 13:37:34,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515892440] [2024-11-03 13:37:34,071 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 13:37:34,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-03 13:37:34,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:37:34,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-03 13:37:34,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-03 13:37:34,072 INFO L87 Difference]: Start difference. First operand 286 states and 386 transitions. Second operand has 10 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:34,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:37:34,115 INFO L93 Difference]: Finished difference Result 315 states and 418 transitions. [2024-11-03 13:37:34,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-03 13:37:34,116 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2024-11-03 13:37:34,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:37:34,117 INFO L225 Difference]: With dead ends: 315 [2024-11-03 13:37:34,117 INFO L226 Difference]: Without dead ends: 313 [2024-11-03 13:37:34,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-03 13:37:34,118 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 33 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 13:37:34,118 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 663 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 13:37:34,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2024-11-03 13:37:34,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 290. [2024-11-03 13:37:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 250 states have (on average 1.28) internal successors, (320), 252 states have internal predecessors, (320), 34 states have call successors, (34), 4 states have call predecessors, (34), 5 states have return successors, (35), 35 states have call predecessors, (35), 32 states have call successors, (35) [2024-11-03 13:37:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 389 transitions. [2024-11-03 13:37:34,130 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 389 transitions. Word has length 51 [2024-11-03 13:37:34,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:37:34,130 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 389 transitions. [2024-11-03 13:37:34,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 389 transitions. [2024-11-03 13:37:34,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-03 13:37:34,131 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:37:34,131 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:37:34,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (17)] Forceful destruction successful, exit code 0 [2024-11-03 13:37:34,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:34,332 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:37:34,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:37:34,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1332385442, now seen corresponding path program 1 times [2024-11-03 13:37:34,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:37:34,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982694614] [2024-11-03 13:37:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:37:34,333 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:37:34,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:34,334 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:37:34,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (18)] Waiting until timeout for monitored process [2024-11-03 13:37:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:37:34,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-03 13:37:34,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:37:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 13:37:34,397 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:37:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-03 13:37:34,415 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:37:34,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982694614] [2024-11-03 13:37:34,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [982694614] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 13:37:34,415 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 13:37:34,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2024-11-03 13:37:34,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837423140] [2024-11-03 13:37:34,416 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 13:37:34,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-03 13:37:34,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:37:34,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-03 13:37:34,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-03 13:37:34,416 INFO L87 Difference]: Start difference. First operand 290 states and 389 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:34,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:37:34,437 INFO L93 Difference]: Finished difference Result 299 states and 397 transitions. [2024-11-03 13:37:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-03 13:37:34,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-11-03 13:37:34,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:37:34,442 INFO L225 Difference]: With dead ends: 299 [2024-11-03 13:37:34,442 INFO L226 Difference]: Without dead ends: 243 [2024-11-03 13:37:34,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-03 13:37:34,443 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 13:37:34,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 13:37:34,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-11-03 13:37:34,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 217. [2024-11-03 13:37:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 185 states have (on average 1.2864864864864864) internal successors, (238), 188 states have internal predecessors, (238), 26 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2024-11-03 13:37:34,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 289 transitions. [2024-11-03 13:37:34,459 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 289 transitions. Word has length 52 [2024-11-03 13:37:34,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:37:34,459 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 289 transitions. [2024-11-03 13:37:34,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-03 13:37:34,459 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 289 transitions. [2024-11-03 13:37:34,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-03 13:37:34,459 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:37:34,460 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:37:34,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (18)] Forceful destruction successful, exit code 0 [2024-11-03 13:37:34,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:34,664 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:37:34,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:37:34,664 INFO L85 PathProgramCache]: Analyzing trace with hash -71376074, now seen corresponding path program 1 times [2024-11-03 13:37:34,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:37:34,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458065660] [2024-11-03 13:37:34,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:37:34,665 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:37:34,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:37:34,666 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:37:34,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (19)] Waiting until timeout for monitored process [2024-11-03 13:37:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:37:34,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-03 13:37:34,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:37:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 13:37:44,213 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:37:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 13:37:44,650 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:37:44,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458065660] [2024-11-03 13:37:44,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [458065660] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 13:37:44,650 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 13:37:44,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 16 [2024-11-03 13:37:44,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968868264] [2024-11-03 13:37:44,650 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 13:37:44,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-03 13:37:44,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:37:44,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-03 13:37:44,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=181, Unknown=2, NotChecked=0, Total=240 [2024-11-03 13:37:44,651 INFO L87 Difference]: Start difference. First operand 217 states and 289 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-03 13:37:48,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.68s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-03 13:37:52,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-03 13:37:56,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-03 13:38:00,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-03 13:38:00,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:38:00,816 INFO L93 Difference]: Finished difference Result 233 states and 308 transitions. [2024-11-03 13:38:00,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-03 13:38:00,818 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2024-11-03 13:38:00,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:38:00,819 INFO L225 Difference]: With dead ends: 233 [2024-11-03 13:38:00,819 INFO L226 Difference]: Without dead ends: 231 [2024-11-03 13:38:00,819 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=63, Invalid=207, Unknown=2, NotChecked=0, Total=272 [2024-11-03 13:38:00,820 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 8 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2024-11-03 13:38:00,820 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 862 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 4 Unknown, 0 Unchecked, 16.1s Time] [2024-11-03 13:38:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-03 13:38:00,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 221. [2024-11-03 13:38:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 188 states have (on average 1.2819148936170213) internal successors, (241), 191 states have internal predecessors, (241), 26 states have call successors, (26), 5 states have call predecessors, (26), 6 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2024-11-03 13:38:00,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 292 transitions. [2024-11-03 13:38:00,829 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 292 transitions. Word has length 54 [2024-11-03 13:38:00,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:38:00,830 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 292 transitions. [2024-11-03 13:38:00,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-03 13:38:00,830 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 292 transitions. [2024-11-03 13:38:00,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-03 13:38:00,831 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:38:00,831 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:38:00,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (19)] Ended with exit code 0 [2024-11-03 13:38:01,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:38:01,033 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:38:01,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:38:01,033 INFO L85 PathProgramCache]: Analyzing trace with hash -516760800, now seen corresponding path program 1 times [2024-11-03 13:38:01,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:38:01,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391899289] [2024-11-03 13:38:01,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:38:01,033 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:38:01,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:38:01,037 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:38:01,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (20)] Waiting until timeout for monitored process [2024-11-03 13:38:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:38:01,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-03 13:38:01,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:38:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 13:38:01,112 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:38:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-03 13:38:01,203 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:38:01,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391899289] [2024-11-03 13:38:01,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [391899289] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 13:38:01,203 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 13:38:01,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-11-03 13:38:01,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462879117] [2024-11-03 13:38:01,203 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 13:38:01,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-03 13:38:01,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:38:01,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-03 13:38:01,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-03 13:38:01,205 INFO L87 Difference]: Start difference. First operand 221 states and 292 transitions. Second operand has 10 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 13:38:01,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:38:01,275 INFO L93 Difference]: Finished difference Result 241 states and 312 transitions. [2024-11-03 13:38:01,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-03 13:38:01,275 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2024-11-03 13:38:01,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:38:01,276 INFO L225 Difference]: With dead ends: 241 [2024-11-03 13:38:01,276 INFO L226 Difference]: Without dead ends: 215 [2024-11-03 13:38:01,276 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-03 13:38:01,277 INFO L432 NwaCegarLoop]: 109 mSDtfsCounter, 18 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-03 13:38:01,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 720 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-03 13:38:01,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-03 13:38:01,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 198. [2024-11-03 13:38:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 167 states have (on average 1.2634730538922156) internal successors, (211), 170 states have internal predecessors, (211), 23 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2024-11-03 13:38:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 256 transitions. [2024-11-03 13:38:01,285 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 256 transitions. Word has length 59 [2024-11-03 13:38:01,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:38:01,285 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 256 transitions. [2024-11-03 13:38:01,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-03 13:38:01,285 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 256 transitions. [2024-11-03 13:38:01,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-03 13:38:01,286 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:38:01,286 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:38:01,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (20)] Ended with exit code 0 [2024-11-03 13:38:01,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:38:01,487 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:38:01,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:38:01,488 INFO L85 PathProgramCache]: Analyzing trace with hash 921322142, now seen corresponding path program 1 times [2024-11-03 13:38:01,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:38:01,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936406211] [2024-11-03 13:38:01,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:38:01,488 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:38:01,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:38:01,489 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:38:01,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (21)] Waiting until timeout for monitored process [2024-11-03 13:38:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:38:01,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-03 13:38:01,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:38:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-03 13:38:03,775 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:38:06,116 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-03 13:38:06,116 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:38:06,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936406211] [2024-11-03 13:38:06,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [936406211] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 13:38:06,116 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 13:38:06,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14, 15] imperfect sequences [] total 26 [2024-11-03 13:38:06,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582166466] [2024-11-03 13:38:06,117 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 13:38:06,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-03 13:38:06,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:38:06,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-03 13:38:06,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2024-11-03 13:38:06,118 INFO L87 Difference]: Start difference. First operand 198 states and 256 transitions. Second operand has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-03 13:38:14,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-03 13:38:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 13:38:21,191 INFO L93 Difference]: Finished difference Result 366 states and 472 transitions. [2024-11-03 13:38:21,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-03 13:38:21,193 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2024-11-03 13:38:21,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 13:38:21,194 INFO L225 Difference]: With dead ends: 366 [2024-11-03 13:38:21,194 INFO L226 Difference]: Without dead ends: 328 [2024-11-03 13:38:21,195 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 100 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2024-11-03 13:38:21,195 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 99 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2024-11-03 13:38:21,195 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 1262 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1002 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2024-11-03 13:38:21,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2024-11-03 13:38:21,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 262. [2024-11-03 13:38:21,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 222 states have (on average 1.2567567567567568) internal successors, (279), 226 states have internal predecessors, (279), 32 states have call successors, (32), 6 states have call predecessors, (32), 7 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2024-11-03 13:38:21,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 342 transitions. [2024-11-03 13:38:21,209 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 342 transitions. Word has length 65 [2024-11-03 13:38:21,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 13:38:21,209 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 342 transitions. [2024-11-03 13:38:21,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-03 13:38:21,210 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 342 transitions. [2024-11-03 13:38:21,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-03 13:38:21,210 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 13:38:21,210 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 13:38:21,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (21)] Ended with exit code 0 [2024-11-03 13:38:21,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:38:21,413 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 13:38:21,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 13:38:21,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1467102624, now seen corresponding path program 1 times [2024-11-03 13:38:21,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 13:38:21,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206371616] [2024-11-03 13:38:21,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 13:38:21,414 INFO L173 SolverBuilder]: Constructing external solver with command: bitwuzla [2024-11-03 13:38:21,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla [2024-11-03 13:38:21,420 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null) [2024-11-03 13:38:21,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (22)] Waiting until timeout for monitored process [2024-11-03 13:38:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 13:38:21,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-03 13:38:21,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 13:38:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-03 13:38:34,974 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 13:38:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-03 13:38:36,326 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 13:38:36,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206371616] [2024-11-03 13:38:36,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [206371616] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 13:38:36,327 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 13:38:36,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 20 [2024-11-03 13:38:36,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360087300] [2024-11-03 13:38:36,327 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 13:38:36,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-03 13:38:36,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 13:38:36,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-03 13:38:36,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=309, Unknown=3, NotChecked=0, Total=380 [2024-11-03 13:38:36,334 INFO L87 Difference]: Start difference. First operand 262 states and 342 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-03 13:38:40,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-03 13:38:48,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-03 13:38:53,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-03 13:39:01,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0]