/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/nla-digbench-scaling/divbin_valuebound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 16:48:48,640 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 16:48:48,707 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 16:48:48,713 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 16:48:48,713 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 16:48:48,748 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 16:48:48,749 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 16:48:48,749 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 16:48:48,749 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 16:48:48,753 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 16:48:48,753 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 16:48:48,754 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 16:48:48,754 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 16:48:48,755 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 16:48:48,756 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 16:48:48,756 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 16:48:48,756 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 16:48:48,757 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 16:48:48,757 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 16:48:48,757 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 16:48:48,758 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 16:48:48,759 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 16:48:48,759 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 16:48:48,759 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-16 16:48:48,759 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-16 16:48:48,759 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 16:48:48,760 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-16 16:48:48,760 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 16:48:48,760 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 16:48:48,760 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 16:48:48,761 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 16:48:48,761 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 16:48:48,761 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 16:48:48,762 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 16:48:48,762 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 16:48:48,762 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 16:48:48,762 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 16:48:48,762 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 16:48:48,762 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-12-16 16:48:48,763 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-16 16:48:48,763 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 16:48:48,763 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 16:48:48,763 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 16:48:48,763 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 16:48:48,764 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 16:48:48,764 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-12-16 16:48:48,764 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-12-16 16:48:48,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 16:48:49,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 16:48:49,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 16:48:49,015 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 16:48:49,015 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 16:48:49,016 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound2.i [2023-12-16 16:48:50,055 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 16:48:50,224 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 16:48:50,224 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound2.i [2023-12-16 16:48:50,230 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e530b0fd1/3eded68ad4804fceb27c000e9a3c6b35/FLAGbc4a12efe [2023-12-16 16:48:50,244 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e530b0fd1/3eded68ad4804fceb27c000e9a3c6b35 [2023-12-16 16:48:50,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 16:48:50,247 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 16:48:50,249 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 16:48:50,249 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 16:48:50,253 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 16:48:50,254 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 04:48:50" (1/1) ... [2023-12-16 16:48:50,254 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e98d976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:48:50, skipping insertion in model container [2023-12-16 16:48:50,255 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 04:48:50" (1/1) ... [2023-12-16 16:48:50,276 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 16:48:50,402 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound2.i[950,963] [2023-12-16 16:48:50,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 16:48:50,425 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 16:48:50,435 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound2.i[950,963] [2023-12-16 16:48:50,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 16:48:50,452 INFO L206 MainTranslator]: Completed translation [2023-12-16 16:48:50,452 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:48:50 WrapperNode [2023-12-16 16:48:50,453 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 16:48:50,453 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 16:48:50,454 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 16:48:50,454 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 16:48:50,459 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:48:50" (1/1) ... [2023-12-16 16:48:50,465 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:48:50" (1/1) ... [2023-12-16 16:48:50,478 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 48 [2023-12-16 16:48:50,478 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 16:48:50,479 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 16:48:50,479 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 16:48:50,479 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 16:48:50,487 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:48:50" (1/1) ... [2023-12-16 16:48:50,487 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:48:50" (1/1) ... [2023-12-16 16:48:50,489 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:48:50" (1/1) ... [2023-12-16 16:48:50,504 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 16:48:50,505 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:48:50" (1/1) ... [2023-12-16 16:48:50,505 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:48:50" (1/1) ... [2023-12-16 16:48:50,510 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:48:50" (1/1) ... [2023-12-16 16:48:50,513 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:48:50" (1/1) ... [2023-12-16 16:48:50,513 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:48:50" (1/1) ... [2023-12-16 16:48:50,514 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:48:50" (1/1) ... [2023-12-16 16:48:50,518 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 16:48:50,519 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 16:48:50,519 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 16:48:50,519 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 16:48:50,520 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:48:50" (1/1) ... [2023-12-16 16:48:50,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 16:48:50,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 16:48:50,545 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 16:48:50,569 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 16:48:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 16:48:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-12-16 16:48:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-16 16:48:50,579 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-16 16:48:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 16:48:50,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 16:48:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-16 16:48:50,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-16 16:48:50,643 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 16:48:50,646 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 16:48:50,823 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 16:48:50,855 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 16:48:50,855 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-16 16:48:50,856 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 04:48:50 BoogieIcfgContainer [2023-12-16 16:48:50,856 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 16:48:50,858 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 16:48:50,858 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 16:48:50,860 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 16:48:50,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 04:48:50" (1/3) ... [2023-12-16 16:48:50,862 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63da980f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 04:48:50, skipping insertion in model container [2023-12-16 16:48:50,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:48:50" (2/3) ... [2023-12-16 16:48:50,862 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63da980f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 04:48:50, skipping insertion in model container [2023-12-16 16:48:50,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 04:48:50" (3/3) ... [2023-12-16 16:48:50,864 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_valuebound2.i [2023-12-16 16:48:50,879 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 16:48:50,880 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-16 16:48:50,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 16:48:50,933 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;@453fe998, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 16:48:50,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-16 16:48:50,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-16 16:48:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-16 16:48:50,949 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 16:48:50,949 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 16:48:50,950 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 16:48:50,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 16:48:50,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1335240993, now seen corresponding path program 1 times [2023-12-16 16:48:50,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 16:48:50,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356989740] [2023-12-16 16:48:50,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 16:48:50,965 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 16:48:50,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 16:48:50,971 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 16:48:50,975 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 16:48:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 16:48:51,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-16 16:48:51,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 16:48:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-16 16:48:51,078 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 16:48:51,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 16:48:51,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356989740] [2023-12-16 16:48:51,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356989740] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 16:48:51,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 16:48:51,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-16 16:48:51,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022049088] [2023-12-16 16:48:51,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 16:48:51,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-16 16:48:51,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 16:48:51,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-16 16:48:51,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-16 16:48:51,121 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-16 16:48:51,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 16:48:51,147 INFO L93 Difference]: Finished difference Result 50 states and 79 transitions. [2023-12-16 16:48:51,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-16 16:48:51,149 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2023-12-16 16:48:51,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 16:48:51,153 INFO L225 Difference]: With dead ends: 50 [2023-12-16 16:48:51,153 INFO L226 Difference]: Without dead ends: 24 [2023-12-16 16:48:51,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-16 16:48:51,158 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 16:48:51,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 16:48:51,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-16 16:48:51,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-16 16:48:51,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-16 16:48:51,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-12-16 16:48:51,182 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 29 [2023-12-16 16:48:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 16:48:51,183 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-12-16 16:48:51,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-16 16:48:51,183 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-12-16 16:48:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-16 16:48:51,184 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 16:48:51,184 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 16:48:51,187 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 16:48:51,387 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 16:48:51,388 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 16:48:51,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 16:48:51,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1249624970, now seen corresponding path program 1 times [2023-12-16 16:48:51,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 16:48:51,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597599119] [2023-12-16 16:48:51,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 16:48:51,389 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 16:48:51,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 16:48:51,390 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 16:48:51,392 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 16:48:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 16:48:51,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-16 16:48:51,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 16:48:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-16 16:48:51,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 16:48:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 16:48:51,967 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 16:48:51,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597599119] [2023-12-16 16:48:51,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597599119] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-16 16:48:51,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-16 16:48:51,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-12-16 16:48:51,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187551627] [2023-12-16 16:48:51,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 16:48:51,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-16 16:48:51,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 16:48:51,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-16 16:48:51,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-16 16:48:51,970 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-16 16:48:52,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 16:48:52,414 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-12-16 16:48:52,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-16 16:48:52,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2023-12-16 16:48:52,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 16:48:52,417 INFO L225 Difference]: With dead ends: 35 [2023-12-16 16:48:52,417 INFO L226 Difference]: Without dead ends: 32 [2023-12-16 16:48:52,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-16 16:48:52,419 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-16 16:48:52,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 80 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-16 16:48:52,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-16 16:48:52,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-12-16 16:48:52,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-16 16:48:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-12-16 16:48:52,427 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 30 [2023-12-16 16:48:52,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 16:48:52,428 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-12-16 16:48:52,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-16 16:48:52,429 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-12-16 16:48:52,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-16 16:48:52,430 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 16:48:52,430 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 16:48:52,436 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 16:48:52,630 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 16:48:52,631 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 16:48:52,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 16:48:52,631 INFO L85 PathProgramCache]: Analyzing trace with hash -158878427, now seen corresponding path program 1 times [2023-12-16 16:48:52,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 16:48:52,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719964886] [2023-12-16 16:48:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 16:48:52,632 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 16:48:52,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 16:48:52,633 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 16:48:52,636 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 16:48:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 16:48:52,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-16 16:48:52,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 16:48:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 16:48:52,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 16:48:52,699 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 16:48:52,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719964886] [2023-12-16 16:48:52,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719964886] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 16:48:52,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 16:48:52,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 16:48:52,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999619240] [2023-12-16 16:48:52,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 16:48:52,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 16:48:52,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 16:48:52,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 16:48:52,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 16:48:52,701 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-16 16:48:52,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 16:48:52,731 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2023-12-16 16:48:52,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 16:48:52,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-12-16 16:48:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 16:48:52,733 INFO L225 Difference]: With dead ends: 56 [2023-12-16 16:48:52,733 INFO L226 Difference]: Without dead ends: 34 [2023-12-16 16:48:52,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 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 16:48:52,734 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 16:48:52,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 16:48:52,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-16 16:48:52,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-12-16 16:48:52,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-16 16:48:52,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2023-12-16 16:48:52,742 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 38 [2023-12-16 16:48:52,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 16:48:52,742 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2023-12-16 16:48:52,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-16 16:48:52,742 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2023-12-16 16:48:52,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-16 16:48:52,743 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 16:48:52,744 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 16:48:52,751 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 16:48:52,944 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 16:48:52,944 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 16:48:52,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 16:48:52,948 INFO L85 PathProgramCache]: Analyzing trace with hash 599091488, now seen corresponding path program 1 times [2023-12-16 16:48:52,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 16:48:52,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829100873] [2023-12-16 16:48:52,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 16:48:52,949 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 16:48:52,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 16:48:52,950 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 16:48:52,951 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 16:48:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 16:48:52,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-16 16:48:52,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 16:48:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-16 16:48:53,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 16:48:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 16:48:55,815 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 16:48:55,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829100873] [2023-12-16 16:48:55,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829100873] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 16:48:55,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 16:48:55,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 20 [2023-12-16 16:48:55,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522896323] [2023-12-16 16:48:55,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 16:48:55,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-16 16:48:55,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 16:48:55,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-16 16:48:55,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-12-16 16:48:55,818 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-16 16:48:57,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 16:48:57,581 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2023-12-16 16:48:57,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-16 16:48:57,583 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 40 [2023-12-16 16:48:57,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 16:48:57,584 INFO L225 Difference]: With dead ends: 72 [2023-12-16 16:48:57,584 INFO L226 Difference]: Without dead ends: 50 [2023-12-16 16:48:57,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2023-12-16 16:48:57,586 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-16 16:48:57,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 173 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-16 16:48:57,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-16 16:48:57,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2023-12-16 16:48:57,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-16 16:48:57,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2023-12-16 16:48:57,598 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 40 [2023-12-16 16:48:57,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 16:48:57,598 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2023-12-16 16:48:57,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-16 16:48:57,598 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2023-12-16 16:48:57,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-16 16:48:57,599 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 16:48:57,600 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 16:48:57,612 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 16:48:57,803 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 16:48:57,803 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 16:48:57,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 16:48:57,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2107284293, now seen corresponding path program 2 times [2023-12-16 16:48:57,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 16:48:57,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029196191] [2023-12-16 16:48:57,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 16:48:57,805 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 16:48:57,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 16:48:57,806 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 16:48:57,807 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 16:48:57,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 16:48:57,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 16:48:57,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-16 16:48:57,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 16:48:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-16 16:48:58,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 16:48:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-16 16:48:58,529 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 16:48:58,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029196191] [2023-12-16 16:48:58,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1029196191] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 16:48:58,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 16:48:58,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2023-12-16 16:48:58,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256427853] [2023-12-16 16:48:58,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 16:48:58,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-16 16:48:58,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 16:48:58,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-16 16:48:58,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-12-16 16:48:58,531 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2023-12-16 16:48:59,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 16:48:59,010 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2023-12-16 16:48:59,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-16 16:48:59,010 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 48 [2023-12-16 16:48:59,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 16:48:59,011 INFO L225 Difference]: With dead ends: 66 [2023-12-16 16:48:59,011 INFO L226 Difference]: Without dead ends: 48 [2023-12-16 16:48:59,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2023-12-16 16:48:59,013 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-16 16:48:59,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 204 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-16 16:48:59,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-16 16:48:59,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2023-12-16 16:48:59,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-16 16:48:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-12-16 16:48:59,024 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 48 [2023-12-16 16:48:59,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 16:48:59,024 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-12-16 16:48:59,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2023-12-16 16:48:59,024 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-12-16 16:48:59,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-16 16:48:59,026 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 16:48:59,026 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 16:48:59,029 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 16:48:59,229 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 16:48:59,230 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 16:48:59,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 16:48:59,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1064658186, now seen corresponding path program 3 times [2023-12-16 16:48:59,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 16:48:59,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621079371] [2023-12-16 16:48:59,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 16:48:59,231 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 16:48:59,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 16:48:59,232 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 16:48:59,233 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 16:48:59,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-16 16:48:59,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 16:48:59,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-16 16:48:59,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 16:49:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 13 refuted. 2 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-16 16:49:07,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 16:49:07,977 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 16:49:07,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621079371] [2023-12-16 16:49:07,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621079371] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 16:49:07,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [469587712] [2023-12-16 16:49:07,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 16:49:07,978 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-16 16:49:07,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-16 16:49:08,029 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-16 16:49:08,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2023-12-16 16:49:08,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-16 16:49:08,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 16:49:08,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-16 16:49:08,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 16:49:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-16 16:49:09,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 16:49:11,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [469587712] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 16:49:11,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 16:49:11,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 20 [2023-12-16 16:49:11,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871815157] [2023-12-16 16:49:11,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 16:49:11,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-16 16:49:11,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 16:49:11,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-16 16:49:11,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=705, Unknown=3, NotChecked=0, Total=870 [2023-12-16 16:49:11,357 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-16 16:49:13,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-16 16:49:14,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-16 16:49:16,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 16:49:16,268 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2023-12-16 16:49:16,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-16 16:49:16,268 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 50 [2023-12-16 16:49:16,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 16:49:16,269 INFO L225 Difference]: With dead ends: 59 [2023-12-16 16:49:16,269 INFO L226 Difference]: Without dead ends: 48 [2023-12-16 16:49:16,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=263, Invalid=1140, Unknown=3, NotChecked=0, Total=1406 [2023-12-16 16:49:16,271 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-12-16 16:49:16,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 161 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 224 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2023-12-16 16:49:16,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-16 16:49:16,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2023-12-16 16:49:16,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-16 16:49:16,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2023-12-16 16:49:16,282 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 50 [2023-12-16 16:49:16,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 16:49:16,282 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2023-12-16 16:49:16,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-16 16:49:16,283 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2023-12-16 16:49:16,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-16 16:49:16,284 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 16:49:16,284 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 16:49:16,288 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 (7)] Ended with exit code 0 [2023-12-16 16:49:16,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2023-12-16 16:49:16,687 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=3,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-12-16 16:49:16,688 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 16:49:16,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 16:49:16,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1007399884, now seen corresponding path program 1 times [2023-12-16 16:49:16,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 16:49:16,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717279176] [2023-12-16 16:49:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 16:49:16,689 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 16:49:16,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 16:49:16,690 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 16:49:16,693 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 16:49:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 16:49:16,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-16 16:49:16,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 16:49:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-16 16:49:17,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 16:49:31,926 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-16 16:49:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-16 16:49:31,972 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 16:49:31,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717279176] [2023-12-16 16:49:31,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717279176] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 16:49:31,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 16:49:31,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 26 [2023-12-16 16:49:31,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485168123] [2023-12-16 16:49:31,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 16:49:31,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-16 16:49:31,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 16:49:31,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-16 16:49:31,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2023-12-16 16:49:31,975 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 22 states have internal predecessors, (50), 9 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-16 16:49:47,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 16:49:47,896 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2023-12-16 16:49:47,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-16 16:49:47,903 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 22 states have internal predecessors, (50), 9 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 50 [2023-12-16 16:49:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 16:49:47,905 INFO L225 Difference]: With dead ends: 70 [2023-12-16 16:49:47,905 INFO L226 Difference]: Without dead ends: 66 [2023-12-16 16:49:47,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=371, Invalid=1609, Unknown=0, NotChecked=0, Total=1980 [2023-12-16 16:49:47,906 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 90 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-12-16 16:49:47,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 226 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-12-16 16:49:47,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-16 16:49:47,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2023-12-16 16:49:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 45 states have internal predecessors, (49), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-16 16:49:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-12-16 16:49:47,926 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 50 [2023-12-16 16:49:47,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 16:49:47,927 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-12-16 16:49:47,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 22 states have internal predecessors, (50), 9 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-16 16:49:47,927 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-12-16 16:49:47,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-16 16:49:47,928 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 16:49:47,928 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 16:49:47,940 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 16:49:48,136 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 16:49:48,137 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 16:49:48,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 16:49:48,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1214903247, now seen corresponding path program 2 times [2023-12-16 16:49:48,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-16 16:49:48,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667507800] [2023-12-16 16:49:48,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 16:49:48,138 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 16:49:48,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-16 16:49:48,139 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 16:49:48,147 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 16:49:48,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 16:49:48,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 16:49:48,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-16 16:49:48,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 16:49:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-16 16:49:49,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 16:49:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-16 16:49:53,201 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-16 16:49:53,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667507800] [2023-12-16 16:49:53,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667507800] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 16:49:53,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 16:49:53,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2023-12-16 16:49:53,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026964497] [2023-12-16 16:49:53,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 16:49:53,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-16 16:49:53,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-16 16:49:53,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-16 16:49:53,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2023-12-16 16:49:53,203 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 22 states have internal predecessors, (54), 11 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2023-12-16 16:49:55,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 16:49:55,186 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2023-12-16 16:49:55,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-16 16:49:55,190 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 22 states have internal predecessors, (54), 11 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) Word has length 58 [2023-12-16 16:49:55,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 16:49:55,190 INFO L225 Difference]: With dead ends: 67 [2023-12-16 16:49:55,190 INFO L226 Difference]: Without dead ends: 0 [2023-12-16 16:49:55,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2023-12-16 16:49:55,192 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-16 16:49:55,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 233 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-16 16:49:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-16 16:49:55,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-16 16:49:55,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 16:49:55,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-16 16:49:55,194 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 58 [2023-12-16 16:49:55,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 16:49:55,194 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-16 16:49:55,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 22 states have internal predecessors, (54), 11 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2023-12-16 16:49:55,194 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-16 16:49:55,194 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-16 16:49:55,196 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-16 16:49:55,200 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 16:49:55,400 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 16:49:55,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. Received shutdown request... [2023-12-16 16:50:02,755 WARN L235 SmtUtils]: Removed 13 from assertion stack [2023-12-16 16:50:02,755 WARN L619 AbstractCegarLoop]: Verification canceled: while SimplifyDDAWithTimeout was simplifying term of DAG size 120 for 1059ms.. [2023-12-16 16:50:02,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-16 16:50:02,757 INFO L257 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2023-12-16 16:50:02,758 INFO L158 Benchmark]: Toolchain (without parser) took 72511.06ms. Allocated memory was 183.5MB in the beginning and 223.3MB in the end (delta: 39.8MB). Free memory was 145.6MB in the beginning and 150.7MB in the end (delta: -5.1MB). Peak memory consumption was 35.2MB. Max. memory is 8.0GB. [2023-12-16 16:50:02,758 INFO L158 Benchmark]: CDTParser took 0.51ms. Allocated memory is still 183.5MB. Free memory is still 139.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 16:50:02,759 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.68ms. Allocated memory is still 183.5MB. Free memory was 145.2MB in the beginning and 133.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-16 16:50:02,759 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.92ms. Allocated memory is still 183.5MB. Free memory was 133.7MB in the beginning and 132.5MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-16 16:50:02,759 INFO L158 Benchmark]: Boogie Preprocessor took 39.59ms. Allocated memory is still 183.5MB. Free memory was 132.5MB in the beginning and 130.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 16:50:02,759 INFO L158 Benchmark]: RCFGBuilder took 336.83ms. Allocated memory is still 183.5MB. Free memory was 130.5MB in the beginning and 118.4MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-16 16:50:02,760 INFO L158 Benchmark]: TraceAbstraction took 71900.22ms. Allocated memory was 183.5MB in the beginning and 223.3MB in the end (delta: 39.8MB). Free memory was 118.0MB in the beginning and 150.7MB in the end (delta: -32.8MB). Peak memory consumption was 7.9MB. Max. memory is 8.0GB. [2023-12-16 16:50:02,761 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### [2023-12-16 16:50:02,763 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 --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51ms. Allocated memory is still 183.5MB. Free memory is still 139.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 203.68ms. Allocated memory is still 183.5MB. Free memory was 145.2MB in the beginning and 133.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.92ms. Allocated memory is still 183.5MB. Free memory was 133.7MB in the beginning and 132.5MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.59ms. Allocated memory is still 183.5MB. Free memory was 132.5MB in the beginning and 130.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 336.83ms. Allocated memory is still 183.5MB. Free memory was 130.5MB in the beginning and 118.4MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 71900.22ms. Allocated memory was 183.5MB in the beginning and 223.3MB in the end (delta: 39.8MB). Free memory was 118.0MB in the beginning and 150.7MB in the end (delta: -32.8MB). Peak memory consumption was 7.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown