/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/loops-crafted-1/nested3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-24 23:42:15,809 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-24 23:42:15,848 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-12-24 23:42:15,851 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-24 23:42:15,851 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-24 23:42:15,882 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-24 23:42:15,883 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-24 23:42:15,883 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-24 23:42:15,883 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-24 23:42:15,883 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-24 23:42:15,884 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-24 23:42:15,884 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-24 23:42:15,884 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-24 23:42:15,885 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-24 23:42:15,885 INFO L153 SettingsManager]: * Use SBE=true [2023-12-24 23:42:15,885 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-24 23:42:15,885 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-24 23:42:15,886 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-24 23:42:15,886 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-24 23:42:15,886 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-24 23:42:15,886 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-24 23:42:15,890 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-24 23:42:15,890 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-24 23:42:15,890 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-24 23:42:15,890 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-24 23:42:15,891 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-24 23:42:15,891 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-24 23:42:15,891 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-24 23:42:15,891 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-24 23:42:15,892 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-24 23:42:15,892 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-24 23:42:15,892 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-24 23:42:15,892 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-24 23:42:15,892 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-24 23:42:15,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-24 23:42:15,893 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-24 23:42:15,893 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-24 23:42:15,893 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-24 23:42:15,893 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-12-24 23:42:15,893 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-24 23:42:15,894 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-24 23:42:15,894 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-24 23:42:15,894 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-24 23:42:15,894 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-24 23:42:15,894 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-24 23:42:15,895 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-12-24 23:42:15,895 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-12-24 23:42:16,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-24 23:42:16,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-24 23:42:16,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-24 23:42:16,077 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-24 23:42:16,077 INFO L274 PluginConnector]: CDTParser initialized [2023-12-24 23:42:16,078 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2023-12-24 23:42:17,027 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-24 23:42:17,169 INFO L384 CDTParser]: Found 1 translation units. [2023-12-24 23:42:17,169 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2023-12-24 23:42:17,174 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73407299e/1d46e322c6c04dbcb8c8385113727f9a/FLAG9b99da709 [2023-12-24 23:42:17,188 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73407299e/1d46e322c6c04dbcb8c8385113727f9a [2023-12-24 23:42:17,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-24 23:42:17,191 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-24 23:42:17,193 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-24 23:42:17,193 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-24 23:42:17,196 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-24 23:42:17,196 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.12 11:42:17" (1/1) ... [2023-12-24 23:42:17,197 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@296a1905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:42:17, skipping insertion in model container [2023-12-24 23:42:17,198 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.12 11:42:17" (1/1) ... [2023-12-24 23:42:17,212 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-24 23:42:17,331 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c[321,334] [2023-12-24 23:42:17,349 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-24 23:42:17,359 INFO L202 MainTranslator]: Completed pre-run [2023-12-24 23:42:17,367 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c[321,334] [2023-12-24 23:42:17,372 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-24 23:42:17,383 INFO L206 MainTranslator]: Completed translation [2023-12-24 23:42:17,383 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:42:17 WrapperNode [2023-12-24 23:42:17,383 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-24 23:42:17,384 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-24 23:42:17,384 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-24 23:42:17,384 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-24 23:42:17,389 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:42:17" (1/1) ... [2023-12-24 23:42:17,393 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:42:17" (1/1) ... [2023-12-24 23:42:17,405 INFO L138 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2023-12-24 23:42:17,405 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-24 23:42:17,406 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-24 23:42:17,406 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-24 23:42:17,406 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-24 23:42:17,412 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:42:17" (1/1) ... [2023-12-24 23:42:17,412 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:42:17" (1/1) ... [2023-12-24 23:42:17,423 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:42:17" (1/1) ... [2023-12-24 23:42:17,431 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]. [2023-12-24 23:42:17,431 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:42:17" (1/1) ... [2023-12-24 23:42:17,432 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:42:17" (1/1) ... [2023-12-24 23:42:17,434 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:42:17" (1/1) ... [2023-12-24 23:42:17,436 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:42:17" (1/1) ... [2023-12-24 23:42:17,436 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:42:17" (1/1) ... [2023-12-24 23:42:17,437 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:42:17" (1/1) ... [2023-12-24 23:42:17,438 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-24 23:42:17,439 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-24 23:42:17,439 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-24 23:42:17,439 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-24 23:42:17,439 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:42:17" (1/1) ... [2023-12-24 23:42:17,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-24 23:42:17,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-24 23:42:17,477 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) [2023-12-24 23:42:17,522 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 [2023-12-24 23:42:17,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-24 23:42:17,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-24 23:42:17,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-24 23:42:17,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-12-24 23:42:17,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-24 23:42:17,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-24 23:42:17,580 INFO L241 CfgBuilder]: Building ICFG [2023-12-24 23:42:17,583 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-24 23:42:17,723 INFO L282 CfgBuilder]: Performing block encoding [2023-12-24 23:42:17,752 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-24 23:42:17,753 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-24 23:42:17,753 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 11:42:17 BoogieIcfgContainer [2023-12-24 23:42:17,753 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-24 23:42:17,754 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-24 23:42:17,754 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-24 23:42:17,757 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-24 23:42:17,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.12 11:42:17" (1/3) ... [2023-12-24 23:42:17,757 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b1b7450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 11:42:17, skipping insertion in model container [2023-12-24 23:42:17,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:42:17" (2/3) ... [2023-12-24 23:42:17,757 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b1b7450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 11:42:17, skipping insertion in model container [2023-12-24 23:42:17,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 11:42:17" (3/3) ... [2023-12-24 23:42:17,758 INFO L112 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2023-12-24 23:42:17,770 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-24 23:42:17,770 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-24 23:42:17,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-24 23:42:17,812 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;@70bd99db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-24 23:42:17,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-24 23:42:17,815 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-24 23:42:17,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-24 23:42:17,819 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 23:42:17,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-24 23:42:17,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 23:42:17,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 23:42:17,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1507703365, now seen corresponding path program 1 times [2023-12-24 23:42:17,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 23:42:17,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265927868] [2023-12-24 23:42:17,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 23:42:17,840 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 [2023-12-24 23:42:17,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 23:42:17,842 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) [2023-12-24 23:42:17,846 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 [2023-12-24 23:42:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 23:42:17,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-24 23:42:17,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 23:42:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 23:42:17,911 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 23:42:17,911 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 23:42:17,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265927868] [2023-12-24 23:42:17,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265927868] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 23:42:17,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 23:42:17,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-24 23:42:17,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554854612] [2023-12-24 23:42:17,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 23:42:17,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-24 23:42:17,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 23:42:17,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-24 23:42:17,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-24 23:42:17,934 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 23:42:17,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 23:42:17,968 INFO L93 Difference]: Finished difference Result 40 states and 69 transitions. [2023-12-24 23:42:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-24 23:42:17,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-24 23:42:17,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 23:42:17,974 INFO L225 Difference]: With dead ends: 40 [2023-12-24 23:42:17,974 INFO L226 Difference]: Without dead ends: 22 [2023-12-24 23:42:17,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-24 23:42:17,979 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-24 23:42:17,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 33 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-24 23:42:17,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-24 23:42:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2023-12-24 23:42:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-24 23:42:18,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-12-24 23:42:18,008 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 6 [2023-12-24 23:42:18,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 23:42:18,008 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-12-24 23:42:18,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 23:42:18,008 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-12-24 23:42:18,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-24 23:42:18,009 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 23:42:18,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-24 23:42:18,030 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 (2)] Ended with exit code 0 [2023-12-24 23:42:18,230 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 [2023-12-24 23:42:18,231 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 23:42:18,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 23:42:18,232 INFO L85 PathProgramCache]: Analyzing trace with hash 521920189, now seen corresponding path program 1 times [2023-12-24 23:42:18,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 23:42:18,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771076030] [2023-12-24 23:42:18,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 23:42:18,233 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 [2023-12-24 23:42:18,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 23:42:18,234 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) [2023-12-24 23:42:18,235 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 [2023-12-24 23:42:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 23:42:18,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-24 23:42:18,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 23:42:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 23:42:18,301 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 23:42:18,301 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 23:42:18,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771076030] [2023-12-24 23:42:18,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771076030] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 23:42:18,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 23:42:18,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-24 23:42:18,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583668018] [2023-12-24 23:42:18,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 23:42:18,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-24 23:42:18,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 23:42:18,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-24 23:42:18,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-24 23:42:18,304 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 23:42:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 23:42:18,332 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2023-12-24 23:42:18,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-24 23:42:18,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-24 23:42:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 23:42:18,333 INFO L225 Difference]: With dead ends: 34 [2023-12-24 23:42:18,333 INFO L226 Difference]: Without dead ends: 20 [2023-12-24 23:42:18,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-24 23:42:18,335 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-24 23:42:18,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-24 23:42:18,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-24 23:42:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2023-12-24 23:42:18,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-24 23:42:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-12-24 23:42:18,339 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 7 [2023-12-24 23:42:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 23:42:18,339 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-12-24 23:42:18,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 23:42:18,339 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-12-24 23:42:18,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-24 23:42:18,340 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 23:42:18,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 23:42:18,349 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 (3)] Ended with exit code 0 [2023-12-24 23:42:18,543 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 [2023-12-24 23:42:18,545 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 23:42:18,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 23:42:18,546 INFO L85 PathProgramCache]: Analyzing trace with hash -974159928, now seen corresponding path program 1 times [2023-12-24 23:42:18,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 23:42:18,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104545131] [2023-12-24 23:42:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 23:42:18,547 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 [2023-12-24 23:42:18,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 23:42:18,549 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) [2023-12-24 23:42:18,550 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 [2023-12-24 23:42:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 23:42:18,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-24 23:42:18,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 23:42:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 23:42:18,603 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 23:42:18,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 23:42:18,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104545131] [2023-12-24 23:42:18,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104545131] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 23:42:18,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 23:42:18,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-24 23:42:18,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661760429] [2023-12-24 23:42:18,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 23:42:18,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-24 23:42:18,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 23:42:18,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-24 23:42:18,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-24 23:42:18,605 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 23:42:18,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 23:42:18,618 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-12-24 23:42:18,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-24 23:42:18,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-24 23:42:18,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 23:42:18,619 INFO L225 Difference]: With dead ends: 34 [2023-12-24 23:42:18,619 INFO L226 Difference]: Without dead ends: 19 [2023-12-24 23:42:18,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-24 23:42:18,621 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-24 23:42:18,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-24 23:42:18,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-24 23:42:18,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2023-12-24 23:42:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-24 23:42:18,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-12-24 23:42:18,625 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 8 [2023-12-24 23:42:18,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 23:42:18,625 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-12-24 23:42:18,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 23:42:18,626 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-12-24 23:42:18,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-24 23:42:18,626 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 23:42:18,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 23:42:18,631 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 (4)] Ended with exit code 0 [2023-12-24 23:42:18,830 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 [2023-12-24 23:42:18,831 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 23:42:18,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 23:42:18,832 INFO L85 PathProgramCache]: Analyzing trace with hash -106156257, now seen corresponding path program 1 times [2023-12-24 23:42:18,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 23:42:18,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073707511] [2023-12-24 23:42:18,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 23:42:18,832 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 [2023-12-24 23:42:18,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 23:42:18,833 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) [2023-12-24 23:42:18,837 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 [2023-12-24 23:42:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 23:42:18,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-24 23:42:18,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 23:42:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 23:42:18,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 23:42:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 23:42:18,907 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 23:42:18,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073707511] [2023-12-24 23:42:18,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073707511] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-24 23:42:18,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 23:42:18,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-12-24 23:42:18,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968862301] [2023-12-24 23:42:18,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 23:42:18,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-24 23:42:18,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 23:42:18,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-24 23:42:18,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-24 23:42:18,909 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 23:42:18,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 23:42:18,948 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2023-12-24 23:42:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-24 23:42:18,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-24 23:42:18,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 23:42:18,951 INFO L225 Difference]: With dead ends: 38 [2023-12-24 23:42:18,951 INFO L226 Difference]: Without dead ends: 22 [2023-12-24 23:42:18,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-12-24 23:42:18,954 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-24 23:42:18,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 48 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-24 23:42:18,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-24 23:42:18,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2023-12-24 23:42:18,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-24 23:42:18,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-12-24 23:42:18,959 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 9 [2023-12-24 23:42:18,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 23:42:18,959 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-12-24 23:42:18,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 23:42:18,959 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-12-24 23:42:18,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-24 23:42:18,959 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 23:42:18,960 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 23:42:18,964 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 (5)] Ended with exit code 0 [2023-12-24 23:42:19,164 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 [2023-12-24 23:42:19,165 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 23:42:19,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 23:42:19,165 INFO L85 PathProgramCache]: Analyzing trace with hash 659299720, now seen corresponding path program 2 times [2023-12-24 23:42:19,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 23:42:19,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308385217] [2023-12-24 23:42:19,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-24 23:42:19,166 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 [2023-12-24 23:42:19,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 23:42:19,169 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) [2023-12-24 23:42:19,172 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 [2023-12-24 23:42:19,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-24 23:42:19,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-24 23:42:19,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-24 23:42:19,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 23:42:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 23:42:19,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 23:42:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 23:42:19,411 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 23:42:19,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308385217] [2023-12-24 23:42:19,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308385217] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-24 23:42:19,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 23:42:19,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2023-12-24 23:42:19,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630283282] [2023-12-24 23:42:19,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 23:42:19,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-24 23:42:19,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 23:42:19,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-24 23:42:19,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-12-24 23:42:19,416 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 23:42:19,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 23:42:19,674 INFO L93 Difference]: Finished difference Result 74 states and 99 transitions. [2023-12-24 23:42:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-24 23:42:19,675 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-24 23:42:19,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 23:42:19,676 INFO L225 Difference]: With dead ends: 74 [2023-12-24 23:42:19,676 INFO L226 Difference]: Without dead ends: 55 [2023-12-24 23:42:19,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2023-12-24 23:42:19,677 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-24 23:42:19,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 137 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-24 23:42:19,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-24 23:42:19,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 26. [2023-12-24 23:42:19,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-24 23:42:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-12-24 23:42:19,694 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2023-12-24 23:42:19,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 23:42:19,694 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-12-24 23:42:19,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-24 23:42:19,694 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-12-24 23:42:19,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-24 23:42:19,695 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 23:42:19,695 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 23:42:19,713 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 (6)] Ended with exit code 0 [2023-12-24 23:42:19,897 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 [2023-12-24 23:42:19,897 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 23:42:19,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 23:42:19,897 INFO L85 PathProgramCache]: Analyzing trace with hash -152498750, now seen corresponding path program 1 times [2023-12-24 23:42:19,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 23:42:19,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157559357] [2023-12-24 23:42:19,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 23:42:19,898 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 [2023-12-24 23:42:19,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 23:42:19,899 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) [2023-12-24 23:42:19,900 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 [2023-12-24 23:42:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 23:42:19,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-24 23:42:19,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 23:42:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-24 23:42:19,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 23:42:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 23:42:20,061 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 23:42:20,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157559357] [2023-12-24 23:42:20,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157559357] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-24 23:42:20,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 23:42:20,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-12-24 23:42:20,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989947223] [2023-12-24 23:42:20,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 23:42:20,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-24 23:42:20,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 23:42:20,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-24 23:42:20,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-12-24 23:42:20,063 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-24 23:42:20,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 23:42:20,205 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2023-12-24 23:42:20,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-24 23:42:20,206 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-12-24 23:42:20,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 23:42:20,207 INFO L225 Difference]: With dead ends: 58 [2023-12-24 23:42:20,207 INFO L226 Difference]: Without dead ends: 34 [2023-12-24 23:42:20,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2023-12-24 23:42:20,210 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-24 23:42:20,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 112 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-24 23:42:20,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-24 23:42:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-12-24 23:42:20,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-24 23:42:20,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2023-12-24 23:42:20,224 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 20 [2023-12-24 23:42:20,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 23:42:20,224 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2023-12-24 23:42:20,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-24 23:42:20,224 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2023-12-24 23:42:20,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-24 23:42:20,225 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 23:42:20,225 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 23:42:20,243 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 [2023-12-24 23:42:20,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 23:42:20,430 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 23:42:20,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 23:42:20,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1927193095, now seen corresponding path program 2 times [2023-12-24 23:42:20,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 23:42:20,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217394016] [2023-12-24 23:42:20,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-24 23:42:20,431 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 [2023-12-24 23:42:20,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 23:42:20,432 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 23:42:20,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-12-24 23:42:20,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-24 23:42:20,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-24 23:42:20,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-24 23:42:20,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 23:42:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 78 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-24 23:42:20,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 23:42:20,840 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 3 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 23:42:20,841 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 23:42:20,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217394016] [2023-12-24 23:42:20,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217394016] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-24 23:42:20,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 23:42:20,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2023-12-24 23:42:20,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337420702] [2023-12-24 23:42:20,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 23:42:20,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-24 23:42:20,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 23:42:20,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-24 23:42:20,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2023-12-24 23:42:20,842 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-24 23:42:21,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 23:42:21,436 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2023-12-24 23:42:21,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-24 23:42:21,437 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-12-24 23:42:21,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 23:42:21,438 INFO L225 Difference]: With dead ends: 79 [2023-12-24 23:42:21,438 INFO L226 Difference]: Without dead ends: 48 [2023-12-24 23:42:21,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=558, Invalid=1002, Unknown=0, NotChecked=0, Total=1560 [2023-12-24 23:42:21,439 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-24 23:42:21,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 224 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-24 23:42:21,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-24 23:42:21,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-12-24 23:42:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-24 23:42:21,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-12-24 23:42:21,450 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 27 [2023-12-24 23:42:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 23:42:21,450 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-12-24 23:42:21,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-24 23:42:21,450 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-12-24 23:42:21,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-24 23:42:21,451 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 23:42:21,451 INFO L195 NwaCegarLoop]: trace histogram [26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 23:42:21,453 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 (8)] Ended with exit code 0 [2023-12-24 23:42:21,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 23:42:21,652 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 23:42:21,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 23:42:21,652 INFO L85 PathProgramCache]: Analyzing trace with hash -354429479, now seen corresponding path program 3 times [2023-12-24 23:42:21,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 23:42:21,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85681581] [2023-12-24 23:42:21,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-24 23:42:21,653 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 [2023-12-24 23:42:21,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 23:42:21,654 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) [2023-12-24 23:42:21,654 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 [2023-12-24 23:42:21,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-24 23:42:21,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-24 23:42:21,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-24 23:42:21,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 23:42:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2023-12-24 23:42:21,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 23:42:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2023-12-24 23:42:21,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 23:42:21,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85681581] [2023-12-24 23:42:21,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85681581] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-24 23:42:21,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 23:42:21,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-12-24 23:42:21,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535022658] [2023-12-24 23:42:21,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 23:42:21,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-24 23:42:21,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 23:42:21,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-24 23:42:21,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-24 23:42:21,796 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-24 23:42:21,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 23:42:21,883 INFO L93 Difference]: Finished difference Result 189 states and 205 transitions. [2023-12-24 23:42:21,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-24 23:42:21,884 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2023-12-24 23:42:21,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 23:42:21,885 INFO L225 Difference]: With dead ends: 189 [2023-12-24 23:42:21,885 INFO L226 Difference]: Without dead ends: 144 [2023-12-24 23:42:21,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-24 23:42:21,885 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 23 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-24 23:42:21,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 123 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-24 23:42:21,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-12-24 23:42:21,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2023-12-24 23:42:21,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 102 states have (on average 1.0686274509803921) internal successors, (109), 104 states have internal predecessors, (109), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-24 23:42:21,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2023-12-24 23:42:21,918 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 41 [2023-12-24 23:42:21,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 23:42:21,918 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2023-12-24 23:42:21,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-24 23:42:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2023-12-24 23:42:21,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-24 23:42:21,919 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 23:42:21,919 INFO L195 NwaCegarLoop]: trace histogram [52, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-24 23:42:21,932 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 [2023-12-24 23:42:22,121 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 [2023-12-24 23:42:22,122 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 23:42:22,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 23:42:22,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1721435637, now seen corresponding path program 4 times [2023-12-24 23:42:22,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 23:42:22,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391699833] [2023-12-24 23:42:22,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-24 23:42:22,123 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 [2023-12-24 23:42:22,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 23:42:22,124 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) [2023-12-24 23:42:22,124 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 [2023-12-24 23:42:22,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-24 23:42:22,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-24 23:42:22,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-24 23:42:22,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 23:42:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 731 proven. 351 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2023-12-24 23:42:22,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 23:42:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 735 proven. 351 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2023-12-24 23:42:23,605 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 23:42:23,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391699833] [2023-12-24 23:42:23,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391699833] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-24 23:42:23,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 23:42:23,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2023-12-24 23:42:23,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980008533] [2023-12-24 23:42:23,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 23:42:23,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-12-24 23:42:23,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 23:42:23,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-12-24 23:42:23,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=838, Invalid=2242, Unknown=0, NotChecked=0, Total=3080 [2023-12-24 23:42:23,608 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 56 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 56 states have internal predecessors, (71), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-24 23:42:27,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 23:42:27,063 INFO L93 Difference]: Finished difference Result 307 states and 407 transitions. [2023-12-24 23:42:27,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-12-24 23:42:27,063 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 56 states have internal predecessors, (71), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 75 [2023-12-24 23:42:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 23:42:27,065 INFO L225 Difference]: With dead ends: 307 [2023-12-24 23:42:27,065 INFO L226 Difference]: Without dead ends: 197 [2023-12-24 23:42:27,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2294, Invalid=4348, Unknown=0, NotChecked=0, Total=6642 [2023-12-24 23:42:27,070 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-24 23:42:27,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 462 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-24 23:42:27,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-12-24 23:42:27,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2023-12-24 23:42:27,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 186 states have (on average 1.0376344086021505) internal successors, (193), 188 states have internal predecessors, (193), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-24 23:42:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 204 transitions. [2023-12-24 23:42:27,130 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 204 transitions. Word has length 75 [2023-12-24 23:42:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 23:42:27,131 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 204 transitions. [2023-12-24 23:42:27,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 56 states have internal predecessors, (71), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-24 23:42:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 204 transitions. [2023-12-24 23:42:27,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-24 23:42:27,136 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 23:42:27,136 INFO L195 NwaCegarLoop]: trace histogram [108, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-24 23:42:27,142 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 [2023-12-24 23:42:27,339 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 [2023-12-24 23:42:27,339 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 23:42:27,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 23:42:27,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1584341877, now seen corresponding path program 5 times [2023-12-24 23:42:27,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 23:42:27,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962443272] [2023-12-24 23:42:27,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-24 23:42:27,341 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 [2023-12-24 23:42:27,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 23:42:27,342 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 23:42:27,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-12-24 23:42:27,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2023-12-24 23:42:27,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-24 23:42:27,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-24 23:42:27,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 23:42:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6008 backedges. 3027 proven. 1485 refuted. 0 times theorem prover too weak. 1496 trivial. 0 not checked. [2023-12-24 23:42:28,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 23:42:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6008 backedges. 3031 proven. 1485 refuted. 0 times theorem prover too weak. 1492 trivial. 0 not checked. [2023-12-24 23:42:32,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 23:42:32,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962443272] [2023-12-24 23:42:32,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962443272] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-24 23:42:32,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 23:42:32,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 112 [2023-12-24 23:42:32,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055931839] [2023-12-24 23:42:32,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 23:42:32,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2023-12-24 23:42:32,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 23:42:32,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2023-12-24 23:42:32,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3246, Invalid=9186, Unknown=0, NotChecked=0, Total=12432 [2023-12-24 23:42:32,764 INFO L87 Difference]: Start difference. First operand 196 states and 204 transitions. Second operand has 112 states, 112 states have (on average 1.1339285714285714) internal successors, (127), 112 states have internal predecessors, (127), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-24 23:43:00,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 23:43:00,283 INFO L93 Difference]: Finished difference Result 559 states and 743 transitions. [2023-12-24 23:43:00,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-12-24 23:43:00,284 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.1339285714285714) internal successors, (127), 112 states have internal predecessors, (127), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 131 [2023-12-24 23:43:00,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 23:43:00,286 INFO L225 Difference]: With dead ends: 559 [2023-12-24 23:43:00,286 INFO L226 Difference]: Without dead ends: 365 [2023-12-24 23:43:00,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=9406, Invalid=18316, Unknown=0, NotChecked=0, Total=27722 [2023-12-24 23:43:00,291 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 276 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 3307 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 3476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 3307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-24 23:43:00,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 685 Invalid, 3476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 3307 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-24 23:43:00,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-12-24 23:43:00,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 364. [2023-12-24 23:43:00,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 354 states have (on average 1.0197740112994351) internal successors, (361), 356 states have internal predecessors, (361), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-24 23:43:00,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 372 transitions. [2023-12-24 23:43:00,369 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 372 transitions. Word has length 131 [2023-12-24 23:43:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 23:43:00,369 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 372 transitions. [2023-12-24 23:43:00,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.1339285714285714) internal successors, (127), 112 states have internal predecessors, (127), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-24 23:43:00,369 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 372 transitions. [2023-12-24 23:43:00,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2023-12-24 23:43:00,371 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 23:43:00,371 INFO L195 NwaCegarLoop]: trace histogram [220, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-24 23:43:00,376 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 (11)] Forceful destruction successful, exit code 0 [2023-12-24 23:43:00,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 23:43:00,576 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 23:43:00,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 23:43:00,576 INFO L85 PathProgramCache]: Analyzing trace with hash -580460939, now seen corresponding path program 6 times [2023-12-24 23:43:00,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 23:43:00,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474181823] [2023-12-24 23:43:00,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-24 23:43:00,577 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 [2023-12-24 23:43:00,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 23:43:00,578 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 23:43:00,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-12-24 23:43:00,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-12-24 23:43:00,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-24 23:43:00,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-24 23:43:00,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 23:43:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 24544 backedges. 4 proven. 12326 refuted. 0 times theorem prover too weak. 12214 trivial. 0 not checked. [2023-12-24 23:43:00,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 23:43:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 24544 backedges. 4 proven. 12326 refuted. 0 times theorem prover too weak. 12214 trivial. 0 not checked. [2023-12-24 23:43:01,486 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 23:43:01,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474181823] [2023-12-24 23:43:01,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474181823] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-24 23:43:01,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 23:43:01,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 11 [2023-12-24 23:43:01,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55619370] [2023-12-24 23:43:01,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 23:43:01,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-24 23:43:01,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 23:43:01,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-24 23:43:01,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-12-24 23:43:01,488 INFO L87 Difference]: Start difference. First operand 364 states and 372 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-24 23:43:01,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 23:43:01,779 INFO L93 Difference]: Finished difference Result 1077 states and 1105 transitions. [2023-12-24 23:43:01,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-24 23:43:01,779 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 243 [2023-12-24 23:43:01,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 23:43:01,781 INFO L225 Difference]: With dead ends: 1077 [2023-12-24 23:43:01,781 INFO L226 Difference]: Without dead ends: 713 [2023-12-24 23:43:01,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-12-24 23:43:01,782 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-24 23:43:01,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 121 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-24 23:43:01,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2023-12-24 23:43:01,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 361. [2023-12-24 23:43:01,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 353 states have (on average 1.0141643059490084) internal successors, (358), 353 states have internal predecessors, (358), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-24 23:43:01,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 367 transitions. [2023-12-24 23:43:01,882 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 367 transitions. Word has length 243 [2023-12-24 23:43:01,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 23:43:01,883 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 367 transitions. [2023-12-24 23:43:01,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-24 23:43:01,883 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 367 transitions. [2023-12-24 23:43:01,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2023-12-24 23:43:01,886 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 23:43:01,886 INFO L195 NwaCegarLoop]: trace histogram [330, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 23:43:01,890 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 (12)] Ended with exit code 0 [2023-12-24 23:43:02,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 23:43:02,088 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 23:43:02,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 23:43:02,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1900934882, now seen corresponding path program 1 times [2023-12-24 23:43:02,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 23:43:02,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593798233] [2023-12-24 23:43:02,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 23:43:02,090 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 [2023-12-24 23:43:02,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 23:43:02,108 INFO L229 MonitoredProcess]: Starting monitored process 13 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) [2023-12-24 23:43:02,114 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 (13)] Waiting until timeout for monitored process [2023-12-24 23:43:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 23:43:02,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 112 conjunts are in the unsatisfiable core [2023-12-24 23:43:02,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 23:43:05,271 INFO L134 CoverageAnalysis]: Checked inductivity of 55323 backedges. 24646 proven. 6105 refuted. 0 times theorem prover too weak. 24572 trivial. 0 not checked. [2023-12-24 23:43:05,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 23:43:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 55323 backedges. 24654 proven. 6105 refuted. 0 times theorem prover too weak. 24564 trivial. 0 not checked. [2023-12-24 23:43:18,127 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 23:43:18,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593798233] [2023-12-24 23:43:18,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593798233] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-24 23:43:18,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 23:43:18,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 224 [2023-12-24 23:43:18,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590047416] [2023-12-24 23:43:18,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 23:43:18,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 224 states [2023-12-24 23:43:18,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 23:43:18,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2023-12-24 23:43:18,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12766, Invalid=37186, Unknown=0, NotChecked=0, Total=49952 [2023-12-24 23:43:18,145 INFO L87 Difference]: Start difference. First operand 361 states and 367 transitions. Second operand has 224 states, 224 states have (on average 1.0758928571428572) internal successors, (241), 224 states have internal predecessors, (241), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-24 23:46:04,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 23:46:04,727 INFO L93 Difference]: Finished difference Result 1057 states and 1405 transitions. [2023-12-24 23:46:04,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2023-12-24 23:46:04,727 INFO L78 Accepts]: Start accepts. Automaton has has 224 states, 224 states have (on average 1.0758928571428572) internal successors, (241), 224 states have internal predecessors, (241), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 368 [2023-12-24 23:46:04,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 23:46:04,732 INFO L225 Difference]: With dead ends: 1057 [2023-12-24 23:46:04,732 INFO L226 Difference]: Without dead ends: 698 [2023-12-24 23:46:04,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5995 ImplicationChecksByTransitivity, 178.5s TimeCoverageRelationStatistics Valid=37406, Invalid=73816, Unknown=0, NotChecked=0, Total=111222 [2023-12-24 23:46:04,764 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 82 mSDsluCounter, 1817 mSDsCounter, 0 mSdLazyCounter, 12768 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1834 SdHoareTripleChecker+Invalid, 12851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 12768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-24 23:46:04,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1834 Invalid, 12851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 12768 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-24 23:46:04,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2023-12-24 23:46:04,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 697. [2023-12-24 23:46:04,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 689 states have (on average 1.007256894049347) internal successors, (694), 689 states have internal predecessors, (694), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-24 23:46:04,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 703 transitions. [2023-12-24 23:46:04,958 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 703 transitions. Word has length 368 [2023-12-24 23:46:04,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 23:46:04,970 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 703 transitions. [2023-12-24 23:46:04,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 224 states, 224 states have (on average 1.0758928571428572) internal successors, (241), 224 states have internal predecessors, (241), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-24 23:46:04,971 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 703 transitions. [2023-12-24 23:46:04,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 705 [2023-12-24 23:46:04,992 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 23:46:04,992 INFO L195 NwaCegarLoop]: trace histogram [666, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 23:46:05,018 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 (13)] Forceful destruction successful, exit code 0 [2023-12-24 23:46:05,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /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 [2023-12-24 23:46:05,193 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 23:46:05,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 23:46:05,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1217548770, now seen corresponding path program 2 times [2023-12-24 23:46:05,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 23:46:05,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645470239] [2023-12-24 23:46:05,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-24 23:46:05,194 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 [2023-12-24 23:46:05,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 23:46:05,195 INFO L229 MonitoredProcess]: Starting monitored process 14 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) [2023-12-24 23:46:05,236 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 (14)] Waiting until timeout for monitored process [2023-12-24 23:46:05,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-24 23:46:05,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-24 23:46:05,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 1399 conjuncts, 224 conjunts are in the unsatisfiable core [2023-12-24 23:46:05,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 23:46:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 223491 backedges. 99462 proven. 24753 refuted. 0 times theorem prover too weak. 99276 trivial. 0 not checked. [2023-12-24 23:46:17,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 23:47:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 223491 backedges. 99470 proven. 24753 refuted. 0 times theorem prover too weak. 99268 trivial. 0 not checked. [2023-12-24 23:47:03,415 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 23:47:03,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645470239] [2023-12-24 23:47:03,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645470239] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-24 23:47:03,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 23:47:03,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [225, 225] total 448 [2023-12-24 23:47:03,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761600839] [2023-12-24 23:47:03,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 23:47:03,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 448 states [2023-12-24 23:47:03,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 23:47:03,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 448 interpolants. [2023-12-24 23:47:03,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50622, Invalid=149634, Unknown=0, NotChecked=0, Total=200256 [2023-12-24 23:47:03,430 INFO L87 Difference]: Start difference. First operand 697 states and 703 transitions. Second operand has 448 states, 448 states have (on average 1.0379464285714286) internal successors, (465), 448 states have internal predecessors, (465), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Received shutdown request... [2023-12-24 23:56:56,160 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-24 23:56:56,193 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-24 23:56:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2023-12-24 23:56:56,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1470 GetRequests, 960 SyntacticMatches, 0 SemanticMatches, 509 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 626.6s TimeCoverageRelationStatistics Valid=78846, Invalid=181764, Unknown=0, NotChecked=0, Total=260610 [2023-12-24 23:56:56,628 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 146 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 50238 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 50385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 50238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2023-12-24 23:56:56,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 224 Invalid, 50385 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [147 Valid, 50238 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2023-12-24 23:56:56,629 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-24 23:56:56,645 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 (14)] Forceful destruction successful, exit code 0 [2023-12-24 23:56:56,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /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 [2023-12-24 23:56:56,844 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (697states) and FLOYD_HOARE automaton (currently 288 states, 448 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-160-1 term,while SimplifyDDA2 was simplifying 160 xjuncts wrt. a ATOM-1 context. [2023-12-24 23:56:56,847 INFO L445 BasicCegarLoop]: Path program histogram: [6, 2, 2, 1, 1, 1] [2023-12-24 23:56:56,849 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-24 23:56:56,850 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.12 11:56:56 BoogieIcfgContainer [2023-12-24 23:56:56,850 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-24 23:56:56,851 INFO L158 Benchmark]: Toolchain (without parser) took 879659.63ms. Allocated memory was 190.8MB in the beginning and 544.2MB in the end (delta: 353.4MB). Free memory was 128.0MB in the beginning and 354.8MB in the end (delta: -226.8MB). Peak memory consumption was 372.8MB. Max. memory is 8.0GB. [2023-12-24 23:56:56,851 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 190.8MB. Free memory was 140.4MB in the beginning and 140.2MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-24 23:56:56,851 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.59ms. Allocated memory is still 190.8MB. Free memory was 127.8MB in the beginning and 116.8MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-24 23:56:56,851 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.06ms. Allocated memory is still 190.8MB. Free memory was 116.8MB in the beginning and 115.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-24 23:56:56,852 INFO L158 Benchmark]: Boogie Preprocessor took 32.67ms. Allocated memory is still 190.8MB. Free memory was 115.2MB in the beginning and 113.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-24 23:56:56,852 INFO L158 Benchmark]: RCFGBuilder took 314.37ms. Allocated memory was 190.8MB in the beginning and 262.1MB in the end (delta: 71.3MB). Free memory was 113.3MB in the beginning and 224.3MB in the end (delta: -110.9MB). Peak memory consumption was 13.8MB. Max. memory is 8.0GB. [2023-12-24 23:56:56,852 INFO L158 Benchmark]: TraceAbstraction took 879096.14ms. Allocated memory was 262.1MB in the beginning and 544.2MB in the end (delta: 282.1MB). Free memory was 223.6MB in the beginning and 354.8MB in the end (delta: -131.3MB). Peak memory consumption was 395.6MB. Max. memory is 8.0GB. [2023-12-24 23:56:56,853 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 190.8MB. Free memory was 140.4MB in the beginning and 140.2MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 190.59ms. Allocated memory is still 190.8MB. Free memory was 127.8MB in the beginning and 116.8MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.06ms. Allocated memory is still 190.8MB. Free memory was 116.8MB in the beginning and 115.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.67ms. Allocated memory is still 190.8MB. Free memory was 115.2MB in the beginning and 113.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 314.37ms. Allocated memory was 190.8MB in the beginning and 262.1MB in the end (delta: 71.3MB). Free memory was 113.3MB in the beginning and 224.3MB in the end (delta: -110.9MB). Peak memory consumption was 13.8MB. Max. memory is 8.0GB. * TraceAbstraction took 879096.14ms. Allocated memory was 262.1MB in the beginning and 544.2MB in the end (delta: 282.1MB). Free memory was 223.6MB in the beginning and 354.8MB in the end (delta: -131.3MB). Peak memory consumption was 395.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 7]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 7). Cancelled while NwaCegarLoop was constructing difference of abstraction (697states) and FLOYD_HOARE automaton (currently 288 states, 448 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-160-1 term,while SimplifyDDA2 was simplifying 160 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 879.0s, OverallIterations: 13, TraceHistogramMax: 666, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 792.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 677 SdHoareTripleChecker+Valid, 15.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 666 mSDsluCounter, 4065 SdHoareTripleChecker+Invalid, 13.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3847 mSDsCounter, 487 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 67729 IncrementalHoareTripleChecker+Invalid, 68216 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 487 mSolverCounterUnsat, 218 mSDtfsCounter, 67729 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3546 GetRequests, 2355 SyntacticMatches, 0 SemanticMatches, 1190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9930 ImplicationChecksByTransitivity, 841.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=697occurred in iteration=12, InterpolantAutomatonStates: 489, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 12 MinimizatonAttempts, 429 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 82.1s InterpolantComputationTime, 1651 NumberOfCodeBlocks, 1398 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 3258 ConstructedInterpolants, 0 QuantifiedInterpolants, 10066 SizeOfPredicates, 1 NumberOfNonLiveVariables, 2845 ConjunctsInSsa, 472 ConjunctsInUnsatCore, 23 InterpolantComputations, 3 PerfectInterpolantSequences, 532298/622548 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown