/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-24 22:31:20,775 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-24 22:31:20,815 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 22:31:20,818 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-24 22:31:20,819 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-24 22:31:20,847 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-24 22:31:20,847 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-24 22:31:20,848 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-24 22:31:20,848 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-24 22:31:20,848 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-24 22:31:20,849 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-24 22:31:20,849 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-24 22:31:20,849 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-24 22:31:20,849 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-24 22:31:20,850 INFO L153 SettingsManager]: * Use SBE=true [2023-12-24 22:31:20,850 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-24 22:31:20,850 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-24 22:31:20,850 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-24 22:31:20,851 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-24 22:31:20,851 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-24 22:31:20,851 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-24 22:31:20,851 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-24 22:31:20,852 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-24 22:31:20,852 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-24 22:31:20,852 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-24 22:31:20,852 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-24 22:31:20,853 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-24 22:31:20,853 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-24 22:31:20,853 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-24 22:31:20,853 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-24 22:31:20,853 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-24 22:31:20,854 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-24 22:31:20,854 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-24 22:31:20,854 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-24 22:31:20,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-24 22:31:20,854 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-24 22:31:20,855 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-24 22:31:20,855 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-24 22:31:20,855 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-12-24 22:31:20,855 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-24 22:31:20,855 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-24 22:31:20,856 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-24 22:31:20,856 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-24 22:31:20,856 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-24 22:31:20,856 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-24 22:31:20,856 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-12-24 22:31:20,856 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-12-24 22:31:21,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-24 22:31:21,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-24 22:31:21,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-24 22:31:21,071 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-24 22:31:21,072 INFO L274 PluginConnector]: CDTParser initialized [2023-12-24 22:31:21,073 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2023-12-24 22:31:22,115 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-24 22:31:22,261 INFO L384 CDTParser]: Found 1 translation units. [2023-12-24 22:31:22,262 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2023-12-24 22:31:22,267 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2ddf78c1/11361bc333cf4f81a141799a73c6813c/FLAGf20c73ee6 [2023-12-24 22:31:22,277 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2ddf78c1/11361bc333cf4f81a141799a73c6813c [2023-12-24 22:31:22,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-24 22:31:22,280 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-24 22:31:22,281 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-24 22:31:22,281 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-24 22:31:22,285 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-24 22:31:22,285 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.12 10:31:22" (1/1) ... [2023-12-24 22:31:22,286 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@603640d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 10:31:22, skipping insertion in model container [2023-12-24 22:31:22,286 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.12 10:31:22" (1/1) ... [2023-12-24 22:31:22,299 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-24 22:31:22,405 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i[893,906] [2023-12-24 22:31:22,414 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-24 22:31:22,423 INFO L202 MainTranslator]: Completed pre-run [2023-12-24 22:31:22,435 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i[893,906] [2023-12-24 22:31:22,449 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-24 22:31:22,461 INFO L206 MainTranslator]: Completed translation [2023-12-24 22:31:22,462 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 10:31:22 WrapperNode [2023-12-24 22:31:22,462 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-24 22:31:22,463 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-24 22:31:22,463 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-24 22:31:22,463 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-24 22:31:22,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 10:31:22" (1/1) ... [2023-12-24 22:31:22,482 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 10:31:22" (1/1) ... [2023-12-24 22:31:22,496 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 58 [2023-12-24 22:31:22,497 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-24 22:31:22,497 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-24 22:31:22,497 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-24 22:31:22,498 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-24 22:31:22,504 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 10:31:22" (1/1) ... [2023-12-24 22:31:22,504 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 10:31:22" (1/1) ... [2023-12-24 22:31:22,514 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 10:31:22" (1/1) ... [2023-12-24 22:31:22,526 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 22:31:22,527 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 10:31:22" (1/1) ... [2023-12-24 22:31:22,528 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 10:31:22" (1/1) ... [2023-12-24 22:31:22,539 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 10:31:22" (1/1) ... [2023-12-24 22:31:22,542 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 10:31:22" (1/1) ... [2023-12-24 22:31:22,543 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 10:31:22" (1/1) ... [2023-12-24 22:31:22,543 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 10:31:22" (1/1) ... [2023-12-24 22:31:22,544 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-24 22:31:22,545 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-24 22:31:22,545 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-24 22:31:22,545 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-24 22:31:22,546 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 10:31:22" (1/1) ... [2023-12-24 22:31:22,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-24 22:31:22,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-24 22:31:22,569 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 22:31:22,590 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 22:31:22,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-24 22:31:22,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-12-24 22:31:22,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-24 22:31:22,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-24 22:31:22,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-24 22:31:22,597 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-24 22:31:22,646 INFO L241 CfgBuilder]: Building ICFG [2023-12-24 22:31:22,649 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-24 22:31:22,800 INFO L282 CfgBuilder]: Performing block encoding [2023-12-24 22:31:22,818 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-24 22:31:22,819 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-24 22:31:22,819 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 10:31:22 BoogieIcfgContainer [2023-12-24 22:31:22,819 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-24 22:31:22,822 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-24 22:31:22,822 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-24 22:31:22,824 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-24 22:31:22,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.12 10:31:22" (1/3) ... [2023-12-24 22:31:22,824 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8565d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 10:31:22, skipping insertion in model container [2023-12-24 22:31:22,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 10:31:22" (2/3) ... [2023-12-24 22:31:22,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8565d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 10:31:22, skipping insertion in model container [2023-12-24 22:31:22,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 10:31:22" (3/3) ... [2023-12-24 22:31:22,831 INFO L112 eAbstractionObserver]: Analyzing ICFG MADWiFi-encode_ie_ok.i [2023-12-24 22:31:22,843 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-24 22:31:22,843 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-24 22:31:22,871 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-24 22:31:22,875 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;@15b2eb55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-24 22:31:22,875 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-24 22:31:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-24 22:31:22,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-24 22:31:22,881 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 22:31:22,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 22:31:22,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 22:31:22,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 22:31:22,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2029229109, now seen corresponding path program 1 times [2023-12-24 22:31:22,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 22:31:22,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047720189] [2023-12-24 22:31:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 22:31:22,893 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 22:31:22,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 22:31:22,895 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 22:31:22,906 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 22:31:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 22:31:22,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-24 22:31:22,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 22:31:23,118 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 22:31:23,119 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 22:31:23,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 22:31:23,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047720189] [2023-12-24 22:31:23,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047720189] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 22:31:23,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 22:31:23,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-24 22:31:23,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509400865] [2023-12-24 22:31:23,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 22:31:23,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-24 22:31:23,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 22:31:23,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-24 22:31:23,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-24 22:31:23,148 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 22:31:23,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 22:31:23,239 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2023-12-24 22:31:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-24 22:31:23,241 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 14 [2023-12-24 22:31:23,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 22:31:23,248 INFO L225 Difference]: With dead ends: 43 [2023-12-24 22:31:23,248 INFO L226 Difference]: Without dead ends: 27 [2023-12-24 22:31:23,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-24 22:31:23,253 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-24 22:31:23,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 94 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-24 22:31:23,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-24 22:31:23,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-12-24 22:31:23,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-24 22:31:23,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-12-24 22:31:23,278 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 14 [2023-12-24 22:31:23,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 22:31:23,278 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-12-24 22:31:23,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 22:31:23,279 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-12-24 22:31:23,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-24 22:31:23,280 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 22:31:23,280 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 22:31:23,285 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 22:31:23,485 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 22:31:23,486 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 22:31:23,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 22:31:23,486 INFO L85 PathProgramCache]: Analyzing trace with hash 113283574, now seen corresponding path program 1 times [2023-12-24 22:31:23,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 22:31:23,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473592994] [2023-12-24 22:31:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 22:31:23,487 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 22:31:23,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 22:31:23,488 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 22:31:23,489 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 22:31:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 22:31:23,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-24 22:31:23,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 22:31:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 22:31:23,851 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 22:31:23,851 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 22:31:23,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473592994] [2023-12-24 22:31:23,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473592994] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 22:31:23,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 22:31:23,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-24 22:31:23,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426993044] [2023-12-24 22:31:23,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 22:31:23,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-24 22:31:23,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 22:31:23,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-24 22:31:23,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-12-24 22:31:23,854 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-24 22:31:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 22:31:24,164 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2023-12-24 22:31:24,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-24 22:31:24,165 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-12-24 22:31:24,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 22:31:24,166 INFO L225 Difference]: With dead ends: 33 [2023-12-24 22:31:24,166 INFO L226 Difference]: Without dead ends: 31 [2023-12-24 22:31:24,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-12-24 22:31:24,167 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-24 22:31:24,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 61 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-24 22:31:24,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-24 22:31:24,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-12-24 22:31:24,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-24 22:31:24,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2023-12-24 22:31:24,174 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 19 [2023-12-24 22:31:24,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 22:31:24,174 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2023-12-24 22:31:24,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-24 22:31:24,174 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2023-12-24 22:31:24,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-24 22:31:24,175 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 22:31:24,175 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 22:31:24,179 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 22:31:24,377 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 22:31:24,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 22:31:24,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 22:31:24,378 INFO L85 PathProgramCache]: Analyzing trace with hash -701235469, now seen corresponding path program 1 times [2023-12-24 22:31:24,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 22:31:24,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442456131] [2023-12-24 22:31:24,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 22:31:24,379 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 22:31:24,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 22:31:24,380 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 22:31:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 22:31:24,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-24 22:31:24,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 22:31:24,403 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 22:31:24,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-24 22:31:24,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 22:31:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-24 22:31:24,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 22:31:24,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442456131] [2023-12-24 22:31:24,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442456131] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-24 22:31:24,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 22:31:24,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-12-24 22:31:24,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701923777] [2023-12-24 22:31:24,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 22:31:24,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-24 22:31:24,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 22:31:24,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-24 22:31:24,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-12-24 22:31:24,635 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-24 22:31:24,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 22:31:24,788 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-12-24 22:31:24,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-24 22:31:24,789 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2023-12-24 22:31:24,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 22:31:24,790 INFO L225 Difference]: With dead ends: 49 [2023-12-24 22:31:24,790 INFO L226 Difference]: Without dead ends: 47 [2023-12-24 22:31:24,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-12-24 22:31:24,791 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-24 22:31:24,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 110 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-24 22:31:24,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-24 22:31:24,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-12-24 22:31:24,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-24 22:31:24,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2023-12-24 22:31:24,797 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 26 [2023-12-24 22:31:24,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 22:31:24,798 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2023-12-24 22:31:24,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-24 22:31:24,798 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2023-12-24 22:31:24,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-24 22:31:24,798 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 22:31:24,799 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 22:31:24,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-12-24 22:31:25,001 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 22:31:25,001 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 22:31:25,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 22:31:25,002 INFO L85 PathProgramCache]: Analyzing trace with hash 882816974, now seen corresponding path program 2 times [2023-12-24 22:31:25,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 22:31:25,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813492047] [2023-12-24 22:31:25,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-24 22:31:25,002 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 22:31:25,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 22:31:25,005 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 22:31:25,007 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 22:31:25,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-24 22:31:25,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-24 22:31:25,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-24 22:31:25,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 22:31:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-24 22:31:25,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 22:31:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-24 22:31:27,463 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 22:31:27,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813492047] [2023-12-24 22:31:27,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813492047] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-24 22:31:27,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 22:31:27,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-12-24 22:31:27,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013083014] [2023-12-24 22:31:27,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 22:31:27,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-24 22:31:27,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 22:31:27,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-24 22:31:27,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2023-12-24 22:31:27,466 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 26 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-24 22:31:30,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 22:31:30,050 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2023-12-24 22:31:30,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-24 22:31:30,051 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2023-12-24 22:31:30,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 22:31:30,053 INFO L225 Difference]: With dead ends: 56 [2023-12-24 22:31:30,053 INFO L226 Difference]: Without dead ends: 54 [2023-12-24 22:31:30,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2023-12-24 22:31:30,054 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-24 22:31:30,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 115 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-24 22:31:30,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-24 22:31:30,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-12-24 22:31:30,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.027027027027027) internal successors, (38), 38 states have internal predecessors, (38), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-24 22:31:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2023-12-24 22:31:30,070 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 31 [2023-12-24 22:31:30,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 22:31:30,071 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2023-12-24 22:31:30,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-24 22:31:30,071 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2023-12-24 22:31:30,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-24 22:31:30,073 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 22:31:30,073 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 22:31:30,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-12-24 22:31:30,276 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 22:31:30,276 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 22:31:30,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 22:31:30,277 INFO L85 PathProgramCache]: Analyzing trace with hash 172871787, now seen corresponding path program 3 times [2023-12-24 22:31:30,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 22:31:30,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982824801] [2023-12-24 22:31:30,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-24 22:31:30,277 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 22:31:30,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 22:31:30,278 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 22:31:30,282 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 22:31:30,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-24 22:31:30,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-24 22:31:30,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-24 22:31:30,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 22:31:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-12-24 22:31:30,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 22:31:30,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 22:31:30,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982824801] [2023-12-24 22:31:30,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982824801] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 22:31:30,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [180694581] [2023-12-24 22:31:30,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-24 22:31:30,892 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 22:31:30,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 22:31:30,924 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 22:31:30,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-12-24 22:31:30,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-24 22:31:30,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-24 22:31:30,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-24 22:31:30,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 22:31:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-12-24 22:31:31,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 22:31:31,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [180694581] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 22:31:31,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 22:31:31,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2023-12-24 22:31:31,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744052098] [2023-12-24 22:31:31,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 22:31:31,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-24 22:31:31,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 22:31:31,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-24 22:31:31,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-12-24 22:31:31,229 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-24 22:31:31,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 22:31:31,868 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2023-12-24 22:31:31,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-24 22:31:31,868 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 62 [2023-12-24 22:31:31,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 22:31:31,869 INFO L225 Difference]: With dead ends: 60 [2023-12-24 22:31:31,869 INFO L226 Difference]: Without dead ends: 58 [2023-12-24 22:31:31,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2023-12-24 22:31:31,870 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-24 22:31:31,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-24 22:31:31,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-24 22:31:31,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-12-24 22:31:31,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-24 22:31:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2023-12-24 22:31:31,879 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 62 [2023-12-24 22:31:31,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 22:31:31,879 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2023-12-24 22:31:31,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-24 22:31:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2023-12-24 22:31:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-24 22:31:31,880 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 22:31:31,880 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 22:31:31,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2023-12-24 22:31:32,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-12-24 22:31:32,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,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 22:31:32,287 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 22:31:32,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 22:31:32,288 INFO L85 PathProgramCache]: Analyzing trace with hash 432345430, now seen corresponding path program 4 times [2023-12-24 22:31:32,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 22:31:32,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62051218] [2023-12-24 22:31:32,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-24 22:31:32,288 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 22:31:32,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 22:31:32,289 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 22:31:32,290 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 22:31:32,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-24 22:31:32,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-24 22:31:32,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-24 22:31:32,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 22:31:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 51 proven. 57 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-24 22:31:34,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 22:31:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 51 proven. 57 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-24 22:31:39,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 22:31:39,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62051218] [2023-12-24 22:31:39,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62051218] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-24 22:31:39,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 22:31:39,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 38 [2023-12-24 22:31:39,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914477266] [2023-12-24 22:31:39,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 22:31:39,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-24 22:31:39,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 22:31:39,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-24 22:31:39,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1180, Unknown=0, NotChecked=0, Total=1406 [2023-12-24 22:31:39,467 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 38 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 32 states have internal predecessors, (48), 10 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 15 states have call predecessors, (18), 10 states have call successors, (18) [2023-12-24 22:31:53,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 22:31:53,370 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2023-12-24 22:31:53,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-24 22:31:53,370 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 32 states have internal predecessors, (48), 10 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 15 states have call predecessors, (18), 10 states have call successors, (18) Word has length 67 [2023-12-24 22:31:53,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 22:31:53,371 INFO L225 Difference]: With dead ends: 92 [2023-12-24 22:31:53,372 INFO L226 Difference]: Without dead ends: 90 [2023-12-24 22:31:53,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=725, Invalid=2815, Unknown=0, NotChecked=0, Total=3540 [2023-12-24 22:31:53,373 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 64 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-24 22:31:53,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 206 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-24 22:31:53,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-24 22:31:53,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-12-24 22:31:53,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 59 states have internal predecessors, (59), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-24 22:31:53,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 103 transitions. [2023-12-24 22:31:53,393 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 103 transitions. Word has length 67 [2023-12-24 22:31:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 22:31:53,395 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 103 transitions. [2023-12-24 22:31:53,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 32 states have internal predecessors, (48), 10 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 15 states have call predecessors, (18), 10 states have call successors, (18) [2023-12-24 22:31:53,396 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 103 transitions. [2023-12-24 22:31:53,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-12-24 22:31:53,399 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 22:31:53,399 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 22:31:53,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-12-24 22:31:53,599 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 22:31:53,600 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 22:31:53,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 22:31:53,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1100785562, now seen corresponding path program 5 times [2023-12-24 22:31:53,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 22:31:53,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633801494] [2023-12-24 22:31:53,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-24 22:31:53,601 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 22:31:53,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 22:31:53,603 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 22:31:53,620 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 22:31:53,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-12-24 22:31:53,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-24 22:31:53,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 94 conjunts are in the unsatisfiable core [2023-12-24 22:31:53,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 22:31:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 137 proven. 229 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2023-12-24 22:31:59,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 22:32:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 253 proven. 329 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2023-12-24 22:32:25,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 22:32:25,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633801494] [2023-12-24 22:32:25,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633801494] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-24 22:32:25,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 22:32:25,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32] total 63 [2023-12-24 22:32:25,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338543721] [2023-12-24 22:32:25,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 22:32:25,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-24 22:32:25,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 22:32:25,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-24 22:32:25,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=3220, Unknown=0, NotChecked=0, Total=3906 [2023-12-24 22:32:25,209 INFO L87 Difference]: Start difference. First operand 90 states and 103 transitions. Second operand has 63 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 43 states have internal predecessors, (72), 32 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (42), 31 states have call predecessors, (42), 31 states have call successors, (42) [2023-12-24 22:37:29,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 22:37:29,435 INFO L93 Difference]: Finished difference Result 148 states and 183 transitions. [2023-12-24 22:37:29,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-12-24 22:37:29,436 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 43 states have internal predecessors, (72), 32 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (42), 31 states have call predecessors, (42), 31 states have call successors, (42) Word has length 139 [2023-12-24 22:37:29,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 22:37:29,437 INFO L225 Difference]: With dead ends: 148 [2023-12-24 22:37:29,437 INFO L226 Difference]: Without dead ends: 146 [2023-12-24 22:37:29,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 199 SyntacticMatches, 16 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4090 ImplicationChecksByTransitivity, 327.1s TimeCoverageRelationStatistics Valid=2950, Invalid=11330, Unknown=0, NotChecked=0, Total=14280 [2023-12-24 22:37:29,440 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 120 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-12-24 22:37:29,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 619 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-12-24 22:37:29,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-12-24 22:37:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2023-12-24 22:37:29,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 89 states have internal predecessors, (89), 46 states have call successors, (46), 11 states have call predecessors, (46), 11 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2023-12-24 22:37:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 181 transitions. [2023-12-24 22:37:29,470 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 181 transitions. Word has length 139 [2023-12-24 22:37:29,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 22:37:29,471 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 181 transitions. [2023-12-24 22:37:29,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 43 states have internal predecessors, (72), 32 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (42), 31 states have call predecessors, (42), 31 states have call successors, (42) [2023-12-24 22:37:29,471 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 181 transitions. [2023-12-24 22:37:29,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2023-12-24 22:37:29,473 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 22:37:29,473 INFO L195 NwaCegarLoop]: trace histogram [46, 45, 45, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 22:37:29,479 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 (9)] Forceful destruction successful, exit code 0 [2023-12-24 22:37:29,682 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 22:37:29,685 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 22:37:29,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 22:37:29,685 INFO L85 PathProgramCache]: Analyzing trace with hash -182569338, now seen corresponding path program 6 times [2023-12-24 22:37:29,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 22:37:29,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126419777] [2023-12-24 22:37:29,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-24 22:37:29,686 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 22:37:29,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 22:37:29,687 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 22:37:29,688 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 22:37:30,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2023-12-24 22:37:30,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-24 22:37:30,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 166 conjunts are in the unsatisfiable core [2023-12-24 22:37:30,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 22:37:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 802 proven. 1328 refuted. 0 times theorem prover too weak. 2910 trivial. 0 not checked. [2023-12-24 22:37:54,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 22:40:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 978 proven. 1560 refuted. 0 times theorem prover too weak. 2502 trivial. 0 not checked. [2023-12-24 22:40:24,457 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 22:40:24,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126419777] [2023-12-24 22:40:24,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126419777] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-24 22:40:24,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 22:40:24,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 51] total 103 [2023-12-24 22:40:24,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614753148] [2023-12-24 22:40:24,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 22:40:24,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2023-12-24 22:40:24,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 22:40:24,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2023-12-24 22:40:24,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2083, Invalid=8423, Unknown=0, NotChecked=0, Total=10506 [2023-12-24 22:40:24,468 INFO L87 Difference]: Start difference. First operand 146 states and 181 transitions. Second operand has 103 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 67 states have internal predecessors, (120), 63 states have call successors, (92), 3 states have call predecessors, (92), 2 states have return successors, (90), 64 states have call predecessors, (90), 62 states have call successors, (90) [2023-12-24 22:43:58,926 WARN L293 SmtUtils]: Spent 7.22s on a formula simplification. DAG size of input: 288 DAG size of output: 287 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-24 22:45:45,958 WARN L293 SmtUtils]: Spent 13.54s on a formula simplification. DAG size of input: 286 DAG size of output: 223 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-12-24 22:46:01,699 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 22:46:01,699 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 (10)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-24 22:46:02,708 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 22:46:02,900 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-24 22:46:02,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 [2023-12-24 22:46:02,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-12-24 22:46:02,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 441 SyntacticMatches, 22 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6691 ImplicationChecksByTransitivity, 470.0s TimeCoverageRelationStatistics Valid=4643, Invalid=18545, Unknown=68, NotChecked=0, Total=23256 [2023-12-24 22:46:02,914 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 235 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 3548 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1875 SdHoareTripleChecker+Invalid, 3867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 3548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2023-12-24 22:46:02,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 1875 Invalid, 3867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 3548 Invalid, 0 Unknown, 0 Unchecked, 13.7s Time] [2023-12-24 22:46:02,915 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-24 22:46:02,915 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (146states) and FLOYD_HOARE automaton (currently 60 states, 103 states before enhancement),while executing Executor. [2023-12-24 22:46:02,918 INFO L445 BasicCegarLoop]: Path program histogram: [6, 1, 1] [2023-12-24 22:46:02,920 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-24 22:46:02,921 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.12 10:46:02 BoogieIcfgContainer [2023-12-24 22:46:02,921 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-24 22:46:02,921 INFO L158 Benchmark]: Toolchain (without parser) took 880641.61ms. Allocated memory was 241.2MB in the beginning and 290.5MB in the end (delta: 49.3MB). Free memory was 190.2MB in the beginning and 121.5MB in the end (delta: 68.7MB). Peak memory consumption was 118.1MB. Max. memory is 8.0GB. [2023-12-24 22:46:02,921 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 200.3MB. Free memory is still 146.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-24 22:46:02,922 INFO L158 Benchmark]: CACSL2BoogieTranslator took 181.35ms. Allocated memory is still 241.2MB. Free memory was 190.2MB in the beginning and 178.8MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-24 22:46:02,922 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.21ms. Allocated memory is still 241.2MB. Free memory was 178.8MB in the beginning and 177.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-24 22:46:02,922 INFO L158 Benchmark]: Boogie Preprocessor took 47.13ms. Allocated memory is still 241.2MB. Free memory was 177.2MB in the beginning and 175.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-24 22:46:02,922 INFO L158 Benchmark]: RCFGBuilder took 274.05ms. Allocated memory is still 241.2MB. Free memory was 175.1MB in the beginning and 163.1MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-24 22:46:02,922 INFO L158 Benchmark]: TraceAbstraction took 880099.56ms. Allocated memory was 241.2MB in the beginning and 290.5MB in the end (delta: 49.3MB). Free memory was 162.5MB in the beginning and 121.5MB in the end (delta: 41.0MB). Peak memory consumption was 90.8MB. Max. memory is 8.0GB. [2023-12-24 22:46:02,923 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 200.3MB. Free memory is still 146.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 181.35ms. Allocated memory is still 241.2MB. Free memory was 190.2MB in the beginning and 178.8MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 34.21ms. Allocated memory is still 241.2MB. Free memory was 178.8MB in the beginning and 177.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 47.13ms. Allocated memory is still 241.2MB. Free memory was 177.2MB in the beginning and 175.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 274.05ms. Allocated memory is still 241.2MB. Free memory was 175.1MB in the beginning and 163.1MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 880099.56ms. Allocated memory was 241.2MB in the beginning and 290.5MB in the end (delta: 49.3MB). Free memory was 162.5MB in the beginning and 121.5MB in the end (delta: 41.0MB). Peak memory consumption was 90.8MB. 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: 19]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 19). Cancelled while NwaCegarLoop was constructing difference of abstraction (146states) and FLOYD_HOARE automaton (currently 60 states, 103 states before enhancement),while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 880.1s, OverallIterations: 8, TraceHistogramMax: 46, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 660.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 536 SdHoareTripleChecker+Valid, 21.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 524 mSDsluCounter, 3240 SdHoareTripleChecker+Invalid, 20.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3071 mSDsCounter, 697 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5860 IncrementalHoareTripleChecker+Invalid, 6557 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 697 mSolverCounterUnsat, 169 mSDtfsCounter, 5860 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1431 GetRequests, 971 SyntacticMatches, 38 SemanticMatches, 421 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11918 ImplicationChecksByTransitivity, 818.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=146occurred in iteration=7, InterpolantAutomatonStates: 161, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 216.5s InterpolantComputationTime, 703 NumberOfCodeBlocks, 645 NumberOfCodeBlocksAsserted, 63 NumberOfCheckSat, 1235 ConstructedInterpolants, 22 QuantifiedInterpolants, 16407 SizeOfPredicates, 99 NumberOfNonLiveVariables, 1047 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 9406/13044 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