/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/loop-acceleration/nested_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 16:27:12,473 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 16:27:12,528 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-12-16 16:27:12,531 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 16:27:12,531 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 16:27:12,544 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 16:27:12,544 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 16:27:12,545 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 16:27:12,545 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 16:27:12,548 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 16:27:12,548 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 16:27:12,549 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 16:27:12,549 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 16:27:12,550 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 16:27:12,550 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 16:27:12,551 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 16:27:12,551 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 16:27:12,551 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 16:27:12,551 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 16:27:12,552 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 16:27:12,552 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 16:27:12,553 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 16:27:12,553 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 16:27:12,553 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-16 16:27:12,553 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-16 16:27:12,553 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 16:27:12,553 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-16 16:27:12,554 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 16:27:12,554 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 16:27:12,554 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 16:27:12,555 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 16:27:12,555 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 16:27:12,555 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 16:27:12,555 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 16:27:12,555 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 16:27:12,555 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 16:27:12,556 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 16:27:12,556 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 16:27:12,556 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-12-16 16:27:12,556 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-16 16:27:12,556 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 16:27:12,556 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 16:27:12,556 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 16:27:12,557 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 16:27:12,557 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 16:27:12,557 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-12-16 16:27:12,557 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-12-16 16:27:12,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 16:27:12,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 16:27:12,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 16:27:12,735 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 16:27:12,735 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 16:27:12,737 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2023-12-16 16:27:13,689 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 16:27:13,830 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 16:27:13,831 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2023-12-16 16:27:13,835 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aedd846cd/46417dfe35654166bd18604f13adc7f8/FLAGc22da56a8 [2023-12-16 16:27:13,846 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aedd846cd/46417dfe35654166bd18604f13adc7f8 [2023-12-16 16:27:13,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 16:27:13,849 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 16:27:13,852 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 16:27:13,852 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 16:27:13,868 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 16:27:13,868 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 04:27:13" (1/1) ... [2023-12-16 16:27:13,869 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ec711e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:27:13, skipping insertion in model container [2023-12-16 16:27:13,869 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 04:27:13" (1/1) ... [2023-12-16 16:27:13,882 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 16:27:13,998 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-2.c[322,335] [2023-12-16 16:27:14,010 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 16:27:14,019 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 16:27:14,027 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-2.c[322,335] [2023-12-16 16:27:14,028 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 16:27:14,038 INFO L206 MainTranslator]: Completed translation [2023-12-16 16:27:14,038 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:27:14 WrapperNode [2023-12-16 16:27:14,038 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 16:27:14,039 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 16:27:14,039 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 16:27:14,039 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 16:27:14,044 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:27:14" (1/1) ... [2023-12-16 16:27:14,048 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:27:14" (1/1) ... [2023-12-16 16:27:14,061 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 33 [2023-12-16 16:27:14,061 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 16:27:14,061 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 16:27:14,061 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 16:27:14,062 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 16:27:14,069 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:27:14" (1/1) ... [2023-12-16 16:27:14,070 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:27:14" (1/1) ... [2023-12-16 16:27:14,073 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:27:14" (1/1) ... [2023-12-16 16:27:14,080 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]. [2023-12-16 16:27:14,080 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:27:14" (1/1) ... [2023-12-16 16:27:14,080 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:27:14" (1/1) ... [2023-12-16 16:27:14,088 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:27:14" (1/1) ... [2023-12-16 16:27:14,090 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:27:14" (1/1) ... [2023-12-16 16:27:14,091 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:27:14" (1/1) ... [2023-12-16 16:27:14,092 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:27:14" (1/1) ... [2023-12-16 16:27:14,093 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 16:27:14,093 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 16:27:14,093 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 16:27:14,094 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 16:27:14,094 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:27:14" (1/1) ... [2023-12-16 16:27:14,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 16:27:14,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 16:27:14,117 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) [2023-12-16 16:27:14,118 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 [2023-12-16 16:27:14,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 16:27:14,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 16:27:14,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 16:27:14,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-12-16 16:27:14,184 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 16:27:14,186 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 16:27:14,277 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 16:27:14,311 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 16:27:14,311 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-16 16:27:14,311 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 04:27:14 BoogieIcfgContainer [2023-12-16 16:27:14,311 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 16:27:14,313 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 16:27:14,313 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 16:27:14,315 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 16:27:14,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 04:27:13" (1/3) ... [2023-12-16 16:27:14,316 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ed5818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 04:27:14, skipping insertion in model container [2023-12-16 16:27:14,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:27:14" (2/3) ... [2023-12-16 16:27:14,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ed5818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 04:27:14, skipping insertion in model container [2023-12-16 16:27:14,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 04:27:14" (3/3) ... [2023-12-16 16:27:14,321 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_1-2.c [2023-12-16 16:27:14,333 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 16:27:14,333 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-16 16:27:14,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 16:27:14,373 INFO L357 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, mHoare=true, 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;@542a706c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 16:27:14,373 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-16 16:27:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:14,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-16 16:27:14,384 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 16:27:14,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-16 16:27:14,385 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 16:27:14,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 16:27:14,390 INFO L85 PathProgramCache]: Analyzing trace with hash 68636575, now seen corresponding path program 1 times [2023-12-16 16:27:14,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 16:27:14,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394221575] [2023-12-16 16:27:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 16:27:14,399 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:27:14,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 16:27:14,402 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-16 16:27:14,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-16 16:27:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 16:27:14,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-16 16:27:14,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 16:27:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 16:27:14,468 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 16:27:14,468 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 16:27:14,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394221575] [2023-12-16 16:27:14,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394221575] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 16:27:14,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 16:27:14,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-16 16:27:14,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867580362] [2023-12-16 16:27:14,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 16:27:14,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 16:27:14,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 16:27:14,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 16:27:14,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 16:27:14,492 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:14,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 16:27:14,517 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2023-12-16 16:27:14,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 16:27:14,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-16 16:27:14,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 16:27:14,525 INFO L225 Difference]: With dead ends: 22 [2023-12-16 16:27:14,525 INFO L226 Difference]: Without dead ends: 11 [2023-12-16 16:27:14,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 16:27:14,529 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 16:27:14,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 16:27:14,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-12-16 16:27:14,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2023-12-16 16:27:14,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:14,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2023-12-16 16:27:14,550 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2023-12-16 16:27:14,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 16:27:14,550 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2023-12-16 16:27:14,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:14,550 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2023-12-16 16:27:14,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-16 16:27:14,550 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 16:27:14,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 16:27:14,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-12-16 16:27:14,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:27:14,753 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 16:27:14,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 16:27:14,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1829337052, now seen corresponding path program 1 times [2023-12-16 16:27:14,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 16:27:14,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065098003] [2023-12-16 16:27:14,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 16:27:14,755 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:27:14,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 16:27:14,756 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-16 16:27:14,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-16 16:27:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 16:27:14,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-16 16:27:14,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 16:27:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 16:27:14,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 16:27:14,783 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 16:27:14,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065098003] [2023-12-16 16:27:14,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065098003] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 16:27:14,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 16:27:14,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 16:27:14,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469263039] [2023-12-16 16:27:14,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 16:27:14,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 16:27:14,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 16:27:14,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 16:27:14,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 16:27:14,785 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:14,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 16:27:14,794 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2023-12-16 16:27:14,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 16:27:14,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-16 16:27:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 16:27:14,795 INFO L225 Difference]: With dead ends: 17 [2023-12-16 16:27:14,795 INFO L226 Difference]: Without dead ends: 10 [2023-12-16 16:27:14,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 16:27:14,796 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 16:27:14,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 16:27:14,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-12-16 16:27:14,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-12-16 16:27:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-12-16 16:27:14,799 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2023-12-16 16:27:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 16:27:14,800 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-12-16 16:27:14,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-12-16 16:27:14,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-16 16:27:14,800 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 16:27:14,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 16:27:14,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-12-16 16:27:15,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:27:15,003 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 16:27:15,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 16:27:15,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1803577202, now seen corresponding path program 1 times [2023-12-16 16:27:15,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 16:27:15,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709862789] [2023-12-16 16:27:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 16:27:15,004 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:27:15,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 16:27:15,011 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-16 16:27:15,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-16 16:27:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 16:27:15,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-16 16:27:15,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 16:27:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 16:27:15,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 16:27:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 16:27:15,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 16:27:15,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709862789] [2023-12-16 16:27:15,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709862789] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 16:27:15,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 16:27:15,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-12-16 16:27:15,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698012106] [2023-12-16 16:27:15,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 16:27:15,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-16 16:27:15,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 16:27:15,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-16 16:27:15,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-16 16:27:15,139 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:15,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 16:27:15,168 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2023-12-16 16:27:15,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-16 16:27:15,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-16 16:27:15,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 16:27:15,171 INFO L225 Difference]: With dead ends: 21 [2023-12-16 16:27:15,172 INFO L226 Difference]: Without dead ends: 13 [2023-12-16 16:27:15,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-12-16 16:27:15,173 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 16:27:15,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 16:27:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-16 16:27:15,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-12-16 16:27:15,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:15,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-12-16 16:27:15,176 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2023-12-16 16:27:15,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 16:27:15,176 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-12-16 16:27:15,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:15,177 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-12-16 16:27:15,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-16 16:27:15,177 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 16:27:15,177 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 16:27:15,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-12-16 16:27:15,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:27:15,387 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 16:27:15,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 16:27:15,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1444604836, now seen corresponding path program 2 times [2023-12-16 16:27:15,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 16:27:15,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689895496] [2023-12-16 16:27:15,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 16:27:15,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:27:15,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 16:27:15,389 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-16 16:27:15,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-12-16 16:27:15,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 16:27:15,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 16:27:15,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-16 16:27:15,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 16:27:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 16:27:15,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 16:27:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 16:27:15,541 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 16:27:15,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689895496] [2023-12-16 16:27:15,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689895496] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 16:27:15,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 16:27:15,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-12-16 16:27:15,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494450090] [2023-12-16 16:27:15,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 16:27:15,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-16 16:27:15,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 16:27:15,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-16 16:27:15,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-12-16 16:27:15,543 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:15,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 16:27:15,679 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2023-12-16 16:27:15,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-16 16:27:15,682 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-16 16:27:15,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 16:27:15,683 INFO L225 Difference]: With dead ends: 30 [2023-12-16 16:27:15,683 INFO L226 Difference]: Without dead ends: 19 [2023-12-16 16:27:15,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2023-12-16 16:27:15,684 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 16:27:15,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 16:27:15,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-16 16:27:15,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-12-16 16:27:15,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:15,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-12-16 16:27:15,688 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2023-12-16 16:27:15,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 16:27:15,688 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-12-16 16:27:15,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:15,688 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-12-16 16:27:15,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-16 16:27:15,689 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 16:27:15,689 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 16:27:15,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-12-16 16:27:15,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:27:15,890 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 16:27:15,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 16:27:15,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2080917276, now seen corresponding path program 3 times [2023-12-16 16:27:15,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 16:27:15,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2147174514] [2023-12-16 16:27:15,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 16:27:15,891 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:27:15,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 16:27:15,892 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-16 16:27:15,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-12-16 16:27:15,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-16 16:27:15,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 16:27:15,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-16 16:27:15,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 16:27:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-16 16:27:15,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 16:27:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-16 16:27:15,969 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 16:27:15,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2147174514] [2023-12-16 16:27:15,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2147174514] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 16:27:15,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 16:27:15,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-12-16 16:27:15,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598160761] [2023-12-16 16:27:15,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 16:27:15,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-16 16:27:15,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 16:27:15,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-16 16:27:15,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-16 16:27:15,971 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:16,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 16:27:16,006 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2023-12-16 16:27:16,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-16 16:27:16,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-16 16:27:16,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 16:27:16,007 INFO L225 Difference]: With dead ends: 62 [2023-12-16 16:27:16,008 INFO L226 Difference]: Without dead ends: 58 [2023-12-16 16:27:16,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-12-16 16:27:16,008 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 16:27:16,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 16:27:16,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-16 16:27:16,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-12-16 16:27:16,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:16,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2023-12-16 16:27:16,018 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 18 [2023-12-16 16:27:16,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 16:27:16,019 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2023-12-16 16:27:16,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2023-12-16 16:27:16,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-16 16:27:16,020 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 16:27:16,020 INFO L195 NwaCegarLoop]: trace histogram [40, 4, 4, 4, 1, 1, 1, 1, 1] [2023-12-16 16:27:16,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-12-16 16:27:16,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:27:16,222 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 16:27:16,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 16:27:16,222 INFO L85 PathProgramCache]: Analyzing trace with hash 934366687, now seen corresponding path program 4 times [2023-12-16 16:27:16,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 16:27:16,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950323513] [2023-12-16 16:27:16,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-16 16:27:16,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:27:16,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 16:27:16,224 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-16 16:27:16,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-12-16 16:27:16,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-16 16:27:16,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 16:27:16,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-16 16:27:16,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 16:27:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-12-16 16:27:16,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 16:27:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-12-16 16:27:16,515 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 16:27:16,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950323513] [2023-12-16 16:27:16,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950323513] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 16:27:16,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 16:27:16,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-12-16 16:27:16,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646845458] [2023-12-16 16:27:16,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 16:27:16,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-16 16:27:16,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 16:27:16,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-16 16:27:16,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-12-16 16:27:16,518 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 16:27:16,663 INFO L93 Difference]: Finished difference Result 140 states and 155 transitions. [2023-12-16 16:27:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-16 16:27:16,664 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-12-16 16:27:16,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 16:27:16,669 INFO L225 Difference]: With dead ends: 140 [2023-12-16 16:27:16,670 INFO L226 Difference]: Without dead ends: 136 [2023-12-16 16:27:16,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2023-12-16 16:27:16,674 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 16:27:16,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 76 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 16:27:16,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-12-16 16:27:16,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2023-12-16 16:27:16,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0814814814814815) internal successors, (146), 135 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 146 transitions. [2023-12-16 16:27:16,695 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 146 transitions. Word has length 57 [2023-12-16 16:27:16,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 16:27:16,696 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 146 transitions. [2023-12-16 16:27:16,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 146 transitions. [2023-12-16 16:27:16,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-12-16 16:27:16,698 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 16:27:16,699 INFO L195 NwaCegarLoop]: trace histogram [100, 10, 10, 10, 1, 1, 1, 1, 1] [2023-12-16 16:27:16,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-12-16 16:27:16,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:27:16,902 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 16:27:16,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 16:27:16,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1891032895, now seen corresponding path program 5 times [2023-12-16 16:27:16,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 16:27:16,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478325193] [2023-12-16 16:27:16,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-16 16:27:16,903 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:27:16,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 16:27:16,904 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-16 16:27:16,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-12-16 16:27:17,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2023-12-16 16:27:17,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 16:27:17,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-16 16:27:17,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 16:27:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2023-12-16 16:27:17,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 16:27:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2023-12-16 16:27:18,194 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 16:27:18,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478325193] [2023-12-16 16:27:18,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478325193] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 16:27:18,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 16:27:18,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-12-16 16:27:18,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276203491] [2023-12-16 16:27:18,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 16:27:18,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-16 16:27:18,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 16:27:18,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-16 16:27:18,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2023-12-16 16:27:18,197 INFO L87 Difference]: Start difference. First operand 136 states and 146 transitions. Second operand has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:18,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 16:27:18,860 INFO L93 Difference]: Finished difference Result 296 states and 329 transitions. [2023-12-16 16:27:18,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-16 16:27:18,860 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2023-12-16 16:27:18,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 16:27:18,862 INFO L225 Difference]: With dead ends: 296 [2023-12-16 16:27:18,862 INFO L226 Difference]: Without dead ends: 292 [2023-12-16 16:27:18,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=454, Invalid=806, Unknown=0, NotChecked=0, Total=1260 [2023-12-16 16:27:18,863 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 66 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 16:27:18,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 277 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 16:27:18,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-12-16 16:27:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2023-12-16 16:27:18,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.0790378006872852) internal successors, (314), 291 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:18,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 314 transitions. [2023-12-16 16:27:18,889 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 314 transitions. Word has length 135 [2023-12-16 16:27:18,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 16:27:18,889 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 314 transitions. [2023-12-16 16:27:18,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:18,890 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 314 transitions. [2023-12-16 16:27:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2023-12-16 16:27:18,892 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 16:27:18,892 INFO L195 NwaCegarLoop]: trace histogram [220, 22, 22, 22, 1, 1, 1, 1, 1] [2023-12-16 16:27:18,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-12-16 16:27:19,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:27:19,098 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 16:27:19,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 16:27:19,099 INFO L85 PathProgramCache]: Analyzing trace with hash 82397695, now seen corresponding path program 6 times [2023-12-16 16:27:19,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 16:27:19,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059031358] [2023-12-16 16:27:19,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-16 16:27:19,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:27:19,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 16:27:19,101 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-16 16:27:19,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-12-16 16:27:20,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 94 check-sat command(s) [2023-12-16 16:27:20,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 16:27:20,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-16 16:27:20,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 16:27:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2023-12-16 16:27:21,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 16:27:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 14894 refuted. 0 times theorem prover too weak. 14751 trivial. 0 not checked. [2023-12-16 16:27:22,039 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 16:27:22,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059031358] [2023-12-16 16:27:22,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059031358] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 16:27:22,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 16:27:22,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 4] total 28 [2023-12-16 16:27:22,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867031565] [2023-12-16 16:27:22,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 16:27:22,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-16 16:27:22,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 16:27:22,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-16 16:27:22,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2023-12-16 16:27:22,042 INFO L87 Difference]: Start difference. First operand 292 states and 314 transitions. Second operand has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:22,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 16:27:22,407 INFO L93 Difference]: Finished difference Result 336 states and 362 transitions. [2023-12-16 16:27:22,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-16 16:27:22,407 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 291 [2023-12-16 16:27:22,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 16:27:22,410 INFO L225 Difference]: With dead ends: 336 [2023-12-16 16:27:22,410 INFO L226 Difference]: Without dead ends: 330 [2023-12-16 16:27:22,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 542 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2023-12-16 16:27:22,413 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 8 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-16 16:27:22,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 888 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-16 16:27:22,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-12-16 16:27:22,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 305. [2023-12-16 16:27:22,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.0789473684210527) internal successors, (328), 304 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:22,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 328 transitions. [2023-12-16 16:27:22,444 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 328 transitions. Word has length 291 [2023-12-16 16:27:22,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 16:27:22,445 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 328 transitions. [2023-12-16 16:27:22,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 328 transitions. [2023-12-16 16:27:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-12-16 16:27:22,447 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 16:27:22,448 INFO L195 NwaCegarLoop]: trace histogram [230, 23, 23, 23, 1, 1, 1, 1, 1] [2023-12-16 16:27:22,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-12-16 16:27:22,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:27:22,650 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 16:27:22,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 16:27:22,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1625827516, now seen corresponding path program 7 times [2023-12-16 16:27:22,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 16:27:22,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925582284] [2023-12-16 16:27:22,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-16 16:27:22,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:27:22,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 16:27:22,652 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-16 16:27:22,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-12-16 16:27:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 16:27:24,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-16 16:27:24,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 16:27:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 32407 backedges. 0 proven. 31142 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2023-12-16 16:27:25,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 16:27:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 32407 backedges. 0 proven. 31142 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2023-12-16 16:27:26,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 16:27:26,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925582284] [2023-12-16 16:27:26,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925582284] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 16:27:26,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 16:27:26,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2023-12-16 16:27:26,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534799818] [2023-12-16 16:27:26,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 16:27:26,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-16 16:27:26,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 16:27:26,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-16 16:27:26,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2023-12-16 16:27:26,126 INFO L87 Difference]: Start difference. First operand 305 states and 328 transitions. Second operand has 50 states, 50 states have (on average 3.82) internal successors, (191), 49 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:28,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 16:27:28,937 INFO L93 Difference]: Finished difference Result 647 states and 708 transitions. [2023-12-16 16:27:28,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-16 16:27:28,938 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.82) internal successors, (191), 49 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2023-12-16 16:27:28,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 16:27:28,940 INFO L225 Difference]: With dead ends: 647 [2023-12-16 16:27:28,940 INFO L226 Difference]: Without dead ends: 643 [2023-12-16 16:27:28,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1823, Invalid=3433, Unknown=0, NotChecked=0, Total=5256 [2023-12-16 16:27:28,942 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 78 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-16 16:27:28,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1250 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1272 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-16 16:27:28,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2023-12-16 16:27:28,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 643. [2023-12-16 16:27:28,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 1.0778816199376946) internal successors, (692), 642 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:28,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 692 transitions. [2023-12-16 16:27:28,997 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 692 transitions. Word has length 304 [2023-12-16 16:27:28,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 16:27:28,997 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 692 transitions. [2023-12-16 16:27:28,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.82) internal successors, (191), 49 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:27:28,997 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 692 transitions. [2023-12-16 16:27:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2023-12-16 16:27:29,003 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 16:27:29,004 INFO L195 NwaCegarLoop]: trace histogram [490, 49, 49, 49, 1, 1, 1, 1, 1] [2023-12-16 16:27:29,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-12-16 16:27:29,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:27:29,212 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 16:27:29,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 16:27:29,212 INFO L85 PathProgramCache]: Analyzing trace with hash -854361060, now seen corresponding path program 8 times [2023-12-16 16:27:29,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 16:27:29,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376395812] [2023-12-16 16:27:29,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 16:27:29,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:27:29,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 16:27:29,214 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-16 16:27:29,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-12-16 16:27:37,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 16:27:37,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 16:27:37,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-16 16:27:37,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 16:27:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 147392 backedges. 0 proven. 144697 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2023-12-16 16:27:38,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 16:27:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 147392 backedges. 0 proven. 144697 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2023-12-16 16:27:42,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 16:27:42,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376395812] [2023-12-16 16:27:42,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376395812] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 16:27:42,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 16:27:42,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 101 [2023-12-16 16:27:42,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163108735] [2023-12-16 16:27:42,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 16:27:42,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-12-16 16:27:42,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 16:27:42,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-12-16 16:27:42,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=7601, Unknown=0, NotChecked=0, Total=10302 [2023-12-16 16:27:42,541 INFO L87 Difference]: Start difference. First operand 643 states and 692 transitions. Second operand has 102 states, 102 states have (on average 3.911764705882353) internal successors, (399), 101 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:28:00,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 16:28:00,802 INFO L93 Difference]: Finished difference Result 1323 states and 1449 transitions. [2023-12-16 16:28:00,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-12-16 16:28:00,803 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.911764705882353) internal successors, (399), 101 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 642 [2023-12-16 16:28:00,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 16:28:00,807 INFO L225 Difference]: With dead ends: 1323 [2023-12-16 16:28:00,807 INFO L226 Difference]: Without dead ends: 1319 [2023-12-16 16:28:00,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1331 GetRequests, 1182 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=7699, Invalid=14951, Unknown=0, NotChecked=0, Total=22650 [2023-12-16 16:28:00,812 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 156 mSDsluCounter, 5106 mSDsCounter, 0 mSdLazyCounter, 5258 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 5210 SdHoareTripleChecker+Invalid, 5260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-16 16:28:00,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 5210 Invalid, 5260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5258 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-16 16:28:00,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2023-12-16 16:28:00,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1319. [2023-12-16 16:28:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1318 states have (on average 1.077389984825493) internal successors, (1420), 1318 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:28:00,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 1420 transitions. [2023-12-16 16:28:00,928 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 1420 transitions. Word has length 642 [2023-12-16 16:28:00,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 16:28:00,929 INFO L495 AbstractCegarLoop]: Abstraction has 1319 states and 1420 transitions. [2023-12-16 16:28:00,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.911764705882353) internal successors, (399), 101 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 16:28:00,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 1420 transitions. [2023-12-16 16:28:00,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1319 [2023-12-16 16:28:00,957 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 16:28:00,957 INFO L195 NwaCegarLoop]: trace histogram [1010, 101, 101, 101, 1, 1, 1, 1, 1] [2023-12-16 16:28:00,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-12-16 16:28:01,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:28:01,167 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 16:28:01,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 16:28:01,168 INFO L85 PathProgramCache]: Analyzing trace with hash 731699932, now seen corresponding path program 9 times [2023-12-16 16:28:01,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 16:28:01,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276143089] [2023-12-16 16:28:01,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 16:28:01,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:28:01,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 16:28:01,170 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-16 16:28:01,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process Received shutdown request... [2023-12-16 16:28:30,481 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 16:28:30,514 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 16:28:31,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 [2023-12-16 16:28:31,706 ERROR L246 FreeRefinementEngine]: Caught known exception: Timeout or Toolchain cancelled by user [2023-12-16 16:28:31,708 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-16 16:28:31,714 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forcibly destroying the process [2023-12-16 16:28:31,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 137 [2023-12-16 16:28:31,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-16 16:28:31,730 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 1319 with TraceHistMax 1010,while AutomatonFreeRefinementEngine was Timeout during feasibility check between IpTcStrategyModuleMathsat [276143089] and IpTcStrategyModuleCvc4 [1419477484]. [2023-12-16 16:28:31,733 INFO L445 BasicCegarLoop]: Path program histogram: [9, 1, 1] [2023-12-16 16:28:31,735 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-16 16:28:31,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 04:28:31 BoogieIcfgContainer [2023-12-16 16:28:31,736 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-16 16:28:31,737 INFO L158 Benchmark]: Toolchain (without parser) took 77887.96ms. Allocated memory was 269.5MB in the beginning and 333.4MB in the end (delta: 64.0MB). Free memory was 217.7MB in the beginning and 125.5MB in the end (delta: 92.1MB). Peak memory consumption was 157.4MB. Max. memory is 8.0GB. [2023-12-16 16:28:31,737 INFO L158 Benchmark]: CDTParser took 0.44ms. Allocated memory is still 194.0MB. Free memory is still 143.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 16:28:31,737 INFO L158 Benchmark]: CACSL2BoogieTranslator took 186.77ms. Allocated memory is still 269.5MB. Free memory was 217.7MB in the beginning and 206.9MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-16 16:28:31,737 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.96ms. Allocated memory is still 269.5MB. Free memory was 206.6MB in the beginning and 205.4MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-16 16:28:31,737 INFO L158 Benchmark]: Boogie Preprocessor took 31.53ms. Allocated memory is still 269.5MB. Free memory was 205.4MB in the beginning and 203.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 16:28:31,737 INFO L158 Benchmark]: RCFGBuilder took 217.97ms. Allocated memory is still 269.5MB. Free memory was 203.4MB in the beginning and 192.6MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-16 16:28:31,738 INFO L158 Benchmark]: TraceAbstraction took 77423.62ms. Allocated memory was 269.5MB in the beginning and 333.4MB in the end (delta: 64.0MB). Free memory was 191.9MB in the beginning and 125.5MB in the end (delta: 66.3MB). Peak memory consumption was 131.2MB. Max. memory is 8.0GB. [2023-12-16 16:28:31,739 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44ms. Allocated memory is still 194.0MB. Free memory is still 143.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 186.77ms. Allocated memory is still 269.5MB. Free memory was 217.7MB in the beginning and 206.9MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.96ms. Allocated memory is still 269.5MB. Free memory was 206.6MB in the beginning and 205.4MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.53ms. Allocated memory is still 269.5MB. Free memory was 205.4MB in the beginning and 203.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 217.97ms. Allocated memory is still 269.5MB. Free memory was 203.4MB in the beginning and 192.6MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 77423.62ms. Allocated memory was 269.5MB in the beginning and 333.4MB in the end (delta: 64.0MB). Free memory was 191.9MB in the beginning and 125.5MB in the end (delta: 66.3MB). Peak memory consumption was 131.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 7]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 7). Cancelled while NwaCegarLoop was analyzing trace of length 1319 with TraceHistMax 1010,while AutomatonFreeRefinementEngine was Timeout during feasibility check between IpTcStrategyModuleMathsat [276143089] and IpTcStrategyModuleCvc4 [1419477484]. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 77.4s, OverallIterations: 11, TraceHistogramMax: 1010, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.1s, AutomataDifference: 22.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 344 SdHoareTripleChecker+Valid, 2.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 344 mSDsluCounter, 7799 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7520 mSDsCounter, 42 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7938 IncrementalHoareTripleChecker+Invalid, 7980 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 42 mSolverCounterUnsat, 279 mSDtfsCounter, 7938 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3025 GetRequests, 2692 SyntacticMatches, 11 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 24.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1319occurred in iteration=10, InterpolantAutomatonStates: 247, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 10 MinimizatonAttempts, 27 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 12.0s SatisfiabilityAnalysisTime, 9.4s InterpolantComputationTime, 1481 NumberOfCodeBlocks, 1463 NumberOfCodeBlocksAsserted, 151 NumberOfCheckSat, 2931 ConstructedInterpolants, 0 QuantifiedInterpolants, 12622 SizeOfPredicates, 2 NumberOfNonLiveVariables, 2792 ConjunctsInSsa, 143 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 25536/433141 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown