/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver Internal_SMTInterpol -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_1-3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-02 19:56:17,464 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 19:56:17,551 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-02 19:56:17,557 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 19:56:17,559 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 19:56:17,594 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 19:56:17,594 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 19:56:17,595 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 19:56:17,596 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-02 19:56:17,597 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-02 19:56:17,597 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 19:56:17,597 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 19:56:17,598 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 19:56:17,598 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 19:56:17,599 INFO L153 SettingsManager]: * Use SBE=true [2024-11-02 19:56:17,599 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 19:56:17,602 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 19:56:17,604 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 19:56:17,604 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 19:56:17,604 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 19:56:17,604 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 19:56:17,605 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 19:56:17,605 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 19:56:17,605 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 19:56:17,606 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-02 19:56:17,606 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 19:56:17,606 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-02 19:56:17,606 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 19:56:17,606 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 19:56:17,607 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 19:56:17,607 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 19:56:17,607 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-02 19:56:17,607 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 19:56:17,608 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 19:56:17,608 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-02 19:56:17,608 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 19:56:17,608 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 19:56:17,609 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 19:56:17,609 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-02 19:56:17,609 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-02 19:56:17,609 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 19:56:17,610 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-02 19:56:17,610 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-02 19:56:17,610 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 19:56:17,611 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol [2024-11-02 19:56:17,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 19:56:17,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 19:56:17,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 19:56:17,887 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 19:56:17,887 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 19:56:17,888 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_1-3a.c.cil.c [2024-11-02 19:56:19,386 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 19:56:19,607 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 19:56:19,607 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-3a.c.cil.c [2024-11-02 19:56:19,616 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d9e137e7/d2cbf5017ce54a2eb7900aeb77d3ace7/FLAG1dff303e9 [2024-11-02 19:56:19,974 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d9e137e7/d2cbf5017ce54a2eb7900aeb77d3ace7 [2024-11-02 19:56:19,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 19:56:19,978 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-02 19:56:19,980 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 19:56:19,981 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 19:56:19,987 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 19:56:19,988 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 07:56:19" (1/1) ... [2024-11-02 19:56:19,989 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@729aaef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:19, skipping insertion in model container [2024-11-02 19:56:19,989 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 07:56:19" (1/1) ... [2024-11-02 19:56:20,028 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 19:56:20,212 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-3a.c.cil.c[730,743] [2024-11-02 19:56:20,267 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 19:56:20,282 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 19:56:20,295 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-3a.c.cil.c[730,743] [2024-11-02 19:56:20,338 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 19:56:20,360 INFO L204 MainTranslator]: Completed translation [2024-11-02 19:56:20,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:20 WrapperNode [2024-11-02 19:56:20,360 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 19:56:20,361 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 19:56:20,362 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 19:56:20,362 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 19:56:20,367 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:20" (1/1) ... [2024-11-02 19:56:20,375 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:20" (1/1) ... [2024-11-02 19:56:20,397 INFO L138 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 148 [2024-11-02 19:56:20,398 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 19:56:20,399 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 19:56:20,399 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 19:56:20,399 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 19:56:20,409 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:20" (1/1) ... [2024-11-02 19:56:20,409 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:20" (1/1) ... [2024-11-02 19:56:20,412 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:20" (1/1) ... [2024-11-02 19:56:20,424 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-02 19:56:20,425 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:20" (1/1) ... [2024-11-02 19:56:20,425 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:20" (1/1) ... [2024-11-02 19:56:20,435 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:20" (1/1) ... [2024-11-02 19:56:20,440 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:20" (1/1) ... [2024-11-02 19:56:20,445 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:20" (1/1) ... [2024-11-02 19:56:20,446 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:20" (1/1) ... [2024-11-02 19:56:20,450 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 19:56:20,451 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 19:56:20,451 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 19:56:20,451 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 19:56:20,452 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:20" (1/1) ... [2024-11-02 19:56:20,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-02 19:56:20,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-02 19:56:20,483 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-02 19:56:20,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-02 19:56:20,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 19:56:20,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-02 19:56:20,508 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-02 19:56:20,508 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-02 19:56:20,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 19:56:20,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 19:56:20,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-02 19:56:20,509 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-02 19:56:20,573 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 19:56:20,575 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 19:56:20,972 INFO L? ?]: Removed 55 outVars from TransFormulas that were not future-live. [2024-11-02 19:56:20,973 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 19:56:20,992 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 19:56:20,993 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 19:56:20,993 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:56:20 BoogieIcfgContainer [2024-11-02 19:56:20,993 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 19:56:20,996 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 19:56:20,997 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 19:56:21,001 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 19:56:21,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 07:56:19" (1/3) ... [2024-11-02 19:56:21,002 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b2c81b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 07:56:21, skipping insertion in model container [2024-11-02 19:56:21,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:56:20" (2/3) ... [2024-11-02 19:56:21,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b2c81b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 07:56:21, skipping insertion in model container [2024-11-02 19:56:21,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:56:20" (3/3) ... [2024-11-02 19:56:21,005 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2024-11-02 19:56:21,018 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 19:56:21,018 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 19:56:21,068 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 19:56:21,074 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@21568b2b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 19:56:21,074 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 19:56:21,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 62 states have internal predecessors, (94), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-02 19:56:21,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-02 19:56:21,088 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:21,089 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:21,089 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:21,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:21,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1607439287, now seen corresponding path program 1 times [2024-11-02 19:56:21,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:21,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728246395] [2024-11-02 19:56:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:21,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:21,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 19:56:21,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:21,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:21,590 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:21,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728246395] [2024-11-02 19:56:21,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [728246395] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:56:21,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:56:21,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-02 19:56:21,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614310583] [2024-11-02 19:56:21,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:56:21,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 19:56:21,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:21,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 19:56:21,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-02 19:56:21,629 INFO L87 Difference]: Start difference. First operand has 72 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 62 states have internal predecessors, (94), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 19:56:21,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:21,898 INFO L93 Difference]: Finished difference Result 175 states and 289 transitions. [2024-11-02 19:56:21,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 19:56:21,900 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-11-02 19:56:21,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:21,912 INFO L225 Difference]: With dead ends: 175 [2024-11-02 19:56:21,912 INFO L226 Difference]: Without dead ends: 100 [2024-11-02 19:56:21,917 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-02 19:56:21,921 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 33 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:21,922 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 630 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 19:56:21,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-02 19:56:21,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2024-11-02 19:56:21,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 82 states have (on average 1.475609756097561) internal successors, (121), 85 states have internal predecessors, (121), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-02 19:56:21,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 148 transitions. [2024-11-02 19:56:21,965 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 148 transitions. Word has length 32 [2024-11-02 19:56:21,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:21,965 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 148 transitions. [2024-11-02 19:56:21,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 19:56:21,966 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 148 transitions. [2024-11-02 19:56:21,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-02 19:56:21,968 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:21,968 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:21,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 19:56:21,969 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:21,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:21,970 INFO L85 PathProgramCache]: Analyzing trace with hash -33736322, now seen corresponding path program 1 times [2024-11-02 19:56:21,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:21,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800117756] [2024-11-02 19:56:21,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:21,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:22,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 19:56:22,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:22,269 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:22,337 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:22,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800117756] [2024-11-02 19:56:22,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1800117756] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:56:22,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:56:22,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2024-11-02 19:56:22,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104722348] [2024-11-02 19:56:22,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:56:22,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 19:56:22,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:22,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 19:56:22,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-02 19:56:22,343 INFO L87 Difference]: Start difference. First operand 98 states and 148 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-02 19:56:22,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:22,477 INFO L93 Difference]: Finished difference Result 185 states and 287 transitions. [2024-11-02 19:56:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 19:56:22,479 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 36 [2024-11-02 19:56:22,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:22,481 INFO L225 Difference]: With dead ends: 185 [2024-11-02 19:56:22,481 INFO L226 Difference]: Without dead ends: 120 [2024-11-02 19:56:22,484 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-02 19:56:22,485 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 9 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:22,485 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 553 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 19:56:22,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-02 19:56:22,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2024-11-02 19:56:22,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 95 states have (on average 1.4210526315789473) internal successors, (135), 96 states have internal predecessors, (135), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (21), 17 states have call predecessors, (21), 14 states have call successors, (21) [2024-11-02 19:56:22,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 171 transitions. [2024-11-02 19:56:22,510 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 171 transitions. Word has length 36 [2024-11-02 19:56:22,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:22,512 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 171 transitions. [2024-11-02 19:56:22,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-02 19:56:22,513 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 171 transitions. [2024-11-02 19:56:22,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-02 19:56:22,515 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:22,515 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:22,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 19:56:22,515 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:22,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:22,516 INFO L85 PathProgramCache]: Analyzing trace with hash 383634716, now seen corresponding path program 1 times [2024-11-02 19:56:22,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:22,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236705911] [2024-11-02 19:56:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:22,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:22,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 19:56:22,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:22,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:22,865 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:22,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236705911] [2024-11-02 19:56:22,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1236705911] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:56:22,865 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:56:22,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2024-11-02 19:56:22,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847805863] [2024-11-02 19:56:22,866 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:56:22,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 19:56:22,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:22,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 19:56:22,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-02 19:56:22,871 INFO L87 Difference]: Start difference. First operand 114 states and 171 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-02 19:56:23,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:23,040 INFO L93 Difference]: Finished difference Result 250 states and 377 transitions. [2024-11-02 19:56:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 19:56:23,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2024-11-02 19:56:23,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:23,043 INFO L225 Difference]: With dead ends: 250 [2024-11-02 19:56:23,043 INFO L226 Difference]: Without dead ends: 189 [2024-11-02 19:56:23,044 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-02 19:56:23,049 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 90 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:23,049 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 429 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 19:56:23,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-11-02 19:56:23,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2024-11-02 19:56:23,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 161 states have (on average 1.4099378881987579) internal successors, (227), 160 states have internal predecessors, (227), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (28), 28 states have call predecessors, (28), 21 states have call successors, (28) [2024-11-02 19:56:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 277 transitions. [2024-11-02 19:56:23,081 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 277 transitions. Word has length 40 [2024-11-02 19:56:23,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:23,082 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 277 transitions. [2024-11-02 19:56:23,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-02 19:56:23,085 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 277 transitions. [2024-11-02 19:56:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-02 19:56:23,087 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:23,087 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:23,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 19:56:23,088 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:23,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:23,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1063693086, now seen corresponding path program 1 times [2024-11-02 19:56:23,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:23,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822164989] [2024-11-02 19:56:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:23,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:23,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 19:56:23,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:23,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:23,415 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:23,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822164989] [2024-11-02 19:56:23,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1822164989] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:56:23,416 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:56:23,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2024-11-02 19:56:23,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735287827] [2024-11-02 19:56:23,416 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:56:23,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 19:56:23,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:23,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 19:56:23,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-02 19:56:23,419 INFO L87 Difference]: Start difference. First operand 187 states and 277 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:23,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:23,568 INFO L93 Difference]: Finished difference Result 235 states and 346 transitions. [2024-11-02 19:56:23,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 19:56:23,569 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-02 19:56:23,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:23,570 INFO L225 Difference]: With dead ends: 235 [2024-11-02 19:56:23,571 INFO L226 Difference]: Without dead ends: 180 [2024-11-02 19:56:23,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-02 19:56:23,576 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 34 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:23,577 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 510 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 19:56:23,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-02 19:56:23,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2024-11-02 19:56:23,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 155 states have (on average 1.3870967741935485) internal successors, (215), 154 states have internal predecessors, (215), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (25), 25 states have call predecessors, (25), 18 states have call successors, (25) [2024-11-02 19:56:23,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 259 transitions. [2024-11-02 19:56:23,603 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 259 transitions. Word has length 40 [2024-11-02 19:56:23,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:23,604 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 259 transitions. [2024-11-02 19:56:23,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 259 transitions. [2024-11-02 19:56:23,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-02 19:56:23,609 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:23,609 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:23,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 19:56:23,609 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:23,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:23,610 INFO L85 PathProgramCache]: Analyzing trace with hash 339137576, now seen corresponding path program 1 times [2024-11-02 19:56:23,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:23,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831993530] [2024-11-02 19:56:23,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:23,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:23,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-02 19:56:23,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:23,841 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 19:56:23,950 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:23,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831993530] [2024-11-02 19:56:23,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [831993530] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 19:56:23,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 19:56:23,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-02 19:56:23,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854270184] [2024-11-02 19:56:23,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 19:56:23,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 19:56:23,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:23,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 19:56:23,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-02 19:56:23,952 INFO L87 Difference]: Start difference. First operand 178 states and 259 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:24,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:24,167 INFO L93 Difference]: Finished difference Result 276 states and 409 transitions. [2024-11-02 19:56:24,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 19:56:24,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-02 19:56:24,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:24,169 INFO L225 Difference]: With dead ends: 276 [2024-11-02 19:56:24,170 INFO L226 Difference]: Without dead ends: 222 [2024-11-02 19:56:24,170 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-02 19:56:24,171 INFO L432 NwaCegarLoop]: 94 mSDtfsCounter, 24 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:24,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 400 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 19:56:24,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-11-02 19:56:24,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 216. [2024-11-02 19:56:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 187 states have (on average 1.3796791443850267) internal successors, (258), 188 states have internal predecessors, (258), 25 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (31), 31 states have call predecessors, (31), 24 states have call successors, (31) [2024-11-02 19:56:24,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 314 transitions. [2024-11-02 19:56:24,197 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 314 transitions. Word has length 43 [2024-11-02 19:56:24,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:24,197 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 314 transitions. [2024-11-02 19:56:24,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:24,198 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 314 transitions. [2024-11-02 19:56:24,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-02 19:56:24,199 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:24,199 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:24,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 19:56:24,201 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:24,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:24,202 INFO L85 PathProgramCache]: Analyzing trace with hash 396395878, now seen corresponding path program 1 times [2024-11-02 19:56:24,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:24,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51064088] [2024-11-02 19:56:24,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:24,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:24,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 19:56:24,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 19:56:24,273 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 19:56:24,326 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:24,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51064088] [2024-11-02 19:56:24,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [51064088] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:56:24,327 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:56:24,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-11-02 19:56:24,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336558939] [2024-11-02 19:56:24,327 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:56:24,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 19:56:24,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:24,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 19:56:24,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-02 19:56:24,329 INFO L87 Difference]: Start difference. First operand 216 states and 314 transitions. Second operand has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:24,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:24,413 INFO L93 Difference]: Finished difference Result 270 states and 393 transitions. [2024-11-02 19:56:24,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 19:56:24,414 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-02 19:56:24,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:24,416 INFO L225 Difference]: With dead ends: 270 [2024-11-02 19:56:24,417 INFO L226 Difference]: Without dead ends: 268 [2024-11-02 19:56:24,417 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-02 19:56:24,418 INFO L432 NwaCegarLoop]: 116 mSDtfsCounter, 49 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:24,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 786 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 19:56:24,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-11-02 19:56:24,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 222. [2024-11-02 19:56:24,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 190 states have (on average 1.3736842105263158) internal successors, (261), 193 states have internal predecessors, (261), 27 states have call successors, (27), 3 states have call predecessors, (27), 4 states have return successors, (33), 31 states have call predecessors, (33), 26 states have call successors, (33) [2024-11-02 19:56:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 321 transitions. [2024-11-02 19:56:24,441 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 321 transitions. Word has length 43 [2024-11-02 19:56:24,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:24,441 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 321 transitions. [2024-11-02 19:56:24,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:24,441 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 321 transitions. [2024-11-02 19:56:24,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-02 19:56:24,442 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:24,443 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:24,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 19:56:24,443 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:24,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:24,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1084774570, now seen corresponding path program 1 times [2024-11-02 19:56:24,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:24,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76370011] [2024-11-02 19:56:24,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:24,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:24,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 19:56:24,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 19:56:24,515 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 19:56:24,563 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:24,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76370011] [2024-11-02 19:56:24,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [76370011] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:56:24,563 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:56:24,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2024-11-02 19:56:24,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48027620] [2024-11-02 19:56:24,564 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:56:24,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 19:56:24,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:24,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 19:56:24,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-02 19:56:24,565 INFO L87 Difference]: Start difference. First operand 222 states and 321 transitions. Second operand has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:24,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:24,606 INFO L93 Difference]: Finished difference Result 229 states and 327 transitions. [2024-11-02 19:56:24,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 19:56:24,607 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-02 19:56:24,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:24,609 INFO L225 Difference]: With dead ends: 229 [2024-11-02 19:56:24,609 INFO L226 Difference]: Without dead ends: 222 [2024-11-02 19:56:24,610 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-02 19:56:24,610 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 6 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:24,610 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 397 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 19:56:24,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-11-02 19:56:24,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2024-11-02 19:56:24,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 190 states have (on average 1.3578947368421053) internal successors, (258), 193 states have internal predecessors, (258), 27 states have call successors, (27), 3 states have call predecessors, (27), 4 states have return successors, (33), 31 states have call predecessors, (33), 26 states have call successors, (33) [2024-11-02 19:56:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 318 transitions. [2024-11-02 19:56:24,623 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 318 transitions. Word has length 44 [2024-11-02 19:56:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:24,624 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 318 transitions. [2024-11-02 19:56:24,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:24,624 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 318 transitions. [2024-11-02 19:56:24,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-02 19:56:24,625 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:24,625 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:24,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-02 19:56:24,626 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:24,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:24,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1077808761, now seen corresponding path program 2 times [2024-11-02 19:56:24,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:24,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497244753] [2024-11-02 19:56:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:24,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:27,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-02 19:56:27,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-02 19:56:27,409 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-02 19:56:27,709 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:27,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497244753] [2024-11-02 19:56:27,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [497244753] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 19:56:27,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 19:56:27,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 20 [2024-11-02 19:56:27,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962536307] [2024-11-02 19:56:27,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 19:56:27,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 19:56:27,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:27,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 19:56:27,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2024-11-02 19:56:27,711 INFO L87 Difference]: Start difference. First operand 222 states and 318 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:28,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:28,247 INFO L93 Difference]: Finished difference Result 325 states and 472 transitions. [2024-11-02 19:56:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 19:56:28,247 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-02 19:56:28,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:28,249 INFO L225 Difference]: With dead ends: 325 [2024-11-02 19:56:28,250 INFO L226 Difference]: Without dead ends: 323 [2024-11-02 19:56:28,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2024-11-02 19:56:28,251 INFO L432 NwaCegarLoop]: 122 mSDtfsCounter, 38 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:28,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 840 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 19:56:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-11-02 19:56:28,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 226. [2024-11-02 19:56:28,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 193 states have (on average 1.3523316062176165) internal successors, (261), 196 states have internal predecessors, (261), 27 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (33), 31 states have call predecessors, (33), 26 states have call successors, (33) [2024-11-02 19:56:28,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 321 transitions. [2024-11-02 19:56:28,276 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 321 transitions. Word has length 44 [2024-11-02 19:56:28,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:28,276 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 321 transitions. [2024-11-02 19:56:28,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:28,277 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 321 transitions. [2024-11-02 19:56:28,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 19:56:28,277 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:28,278 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:28,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-02 19:56:28,278 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:28,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:28,280 INFO L85 PathProgramCache]: Analyzing trace with hash -453561043, now seen corresponding path program 1 times [2024-11-02 19:56:28,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:28,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601000436] [2024-11-02 19:56:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:28,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:28,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 19:56:28,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:28,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 19:56:28,534 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:28,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601000436] [2024-11-02 19:56:28,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [601000436] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:56:28,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:56:28,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2024-11-02 19:56:28,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063748949] [2024-11-02 19:56:28,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:56:28,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 19:56:28,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:28,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 19:56:28,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-02 19:56:28,536 INFO L87 Difference]: Start difference. First operand 226 states and 321 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 19:56:28,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:28,754 INFO L93 Difference]: Finished difference Result 421 states and 607 transitions. [2024-11-02 19:56:28,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 19:56:28,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-11-02 19:56:28,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:28,757 INFO L225 Difference]: With dead ends: 421 [2024-11-02 19:56:28,758 INFO L226 Difference]: Without dead ends: 387 [2024-11-02 19:56:28,758 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-02 19:56:28,759 INFO L432 NwaCegarLoop]: 134 mSDtfsCounter, 44 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:28,759 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 824 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 19:56:28,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2024-11-02 19:56:28,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 235. [2024-11-02 19:56:28,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 201 states have (on average 1.36318407960199) internal successors, (274), 201 states have internal predecessors, (274), 28 states have call successors, (28), 4 states have call predecessors, (28), 5 states have return successors, (34), 34 states have call predecessors, (34), 27 states have call successors, (34) [2024-11-02 19:56:28,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 336 transitions. [2024-11-02 19:56:28,774 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 336 transitions. Word has length 45 [2024-11-02 19:56:28,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:28,774 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 336 transitions. [2024-11-02 19:56:28,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 19:56:28,774 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 336 transitions. [2024-11-02 19:56:28,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 19:56:28,775 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:28,775 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:28,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-02 19:56:28,776 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:28,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:28,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1134786859, now seen corresponding path program 1 times [2024-11-02 19:56:28,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:28,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277508974] [2024-11-02 19:56:28,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:28,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:28,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-02 19:56:28,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 19:56:28,877 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 19:56:28,962 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:28,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277508974] [2024-11-02 19:56:28,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1277508974] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:56:28,962 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:56:28,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-11-02 19:56:28,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731845027] [2024-11-02 19:56:28,963 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:56:28,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 19:56:28,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:28,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 19:56:28,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-02 19:56:28,964 INFO L87 Difference]: Start difference. First operand 235 states and 336 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:29,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:29,318 INFO L93 Difference]: Finished difference Result 304 states and 430 transitions. [2024-11-02 19:56:29,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-02 19:56:29,319 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-02 19:56:29,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:29,320 INFO L225 Difference]: With dead ends: 304 [2024-11-02 19:56:29,320 INFO L226 Difference]: Without dead ends: 270 [2024-11-02 19:56:29,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-02 19:56:29,321 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 60 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:29,322 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 563 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 19:56:29,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2024-11-02 19:56:29,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 208. [2024-11-02 19:56:29,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 176 states have (on average 1.3579545454545454) internal successors, (239), 174 states have internal predecessors, (239), 26 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (32), 32 states have call predecessors, (32), 25 states have call successors, (32) [2024-11-02 19:56:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 297 transitions. [2024-11-02 19:56:29,335 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 297 transitions. Word has length 45 [2024-11-02 19:56:29,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:29,335 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 297 transitions. [2024-11-02 19:56:29,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:29,335 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 297 transitions. [2024-11-02 19:56:29,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-02 19:56:29,336 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:29,336 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:29,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-02 19:56:29,336 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:29,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:29,337 INFO L85 PathProgramCache]: Analyzing trace with hash 702695573, now seen corresponding path program 1 times [2024-11-02 19:56:29,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:29,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272849894] [2024-11-02 19:56:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:29,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:29,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 19:56:29,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 19:56:29,373 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 19:56:29,388 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:29,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272849894] [2024-11-02 19:56:29,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1272849894] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-02 19:56:29,389 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-02 19:56:29,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2024-11-02 19:56:29,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365722999] [2024-11-02 19:56:29,389 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-02 19:56:29,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 19:56:29,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:29,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 19:56:29,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 19:56:29,390 INFO L87 Difference]: Start difference. First operand 208 states and 297 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:29,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:29,409 INFO L93 Difference]: Finished difference Result 221 states and 311 transitions. [2024-11-02 19:56:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 19:56:29,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-11-02 19:56:29,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:29,411 INFO L225 Difference]: With dead ends: 221 [2024-11-02 19:56:29,411 INFO L226 Difference]: Without dead ends: 197 [2024-11-02 19:56:29,412 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 19:56:29,412 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 0 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:29,412 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 291 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 19:56:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-02 19:56:29,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2024-11-02 19:56:29,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 163 states have (on average 1.3312883435582823) internal successors, (217), 160 states have internal predecessors, (217), 25 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (30), 30 states have call predecessors, (30), 23 states have call successors, (30) [2024-11-02 19:56:29,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 272 transitions. [2024-11-02 19:56:29,425 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 272 transitions. Word has length 48 [2024-11-02 19:56:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:29,425 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 272 transitions. [2024-11-02 19:56:29,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 19:56:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 272 transitions. [2024-11-02 19:56:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-02 19:56:29,426 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:29,426 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:29,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-02 19:56:29,427 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:29,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:29,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1948634931, now seen corresponding path program 1 times [2024-11-02 19:56:29,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:29,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046462977] [2024-11-02 19:56:29,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:29,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 19:56:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 19:56:40,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-02 19:56:40,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 19:56:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 19:56:40,220 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 19:56:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-02 19:56:40,360 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-02 19:56:40,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046462977] [2024-11-02 19:56:40,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2046462977] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 19:56:40,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 19:56:40,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 11 [2024-11-02 19:56:40,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287743721] [2024-11-02 19:56:40,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 19:56:40,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-02 19:56:40,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-02 19:56:40,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-02 19:56:40,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-02 19:56:40,361 INFO L87 Difference]: Start difference. First operand 194 states and 272 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 19:56:40,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 19:56:40,624 INFO L93 Difference]: Finished difference Result 299 states and 405 transitions. [2024-11-02 19:56:40,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 19:56:40,625 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2024-11-02 19:56:40,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 19:56:40,628 INFO L225 Difference]: With dead ends: 299 [2024-11-02 19:56:40,628 INFO L226 Difference]: Without dead ends: 236 [2024-11-02 19:56:40,629 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-02 19:56:40,629 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 62 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 19:56:40,629 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 756 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 19:56:40,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-02 19:56:40,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 172. [2024-11-02 19:56:40,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 146 states have (on average 1.3150684931506849) internal successors, (192), 143 states have internal predecessors, (192), 20 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (25), 25 states have call predecessors, (25), 18 states have call successors, (25) [2024-11-02 19:56:40,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 237 transitions. [2024-11-02 19:56:40,641 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 237 transitions. Word has length 50 [2024-11-02 19:56:40,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 19:56:40,641 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 237 transitions. [2024-11-02 19:56:40,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 19:56:40,642 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 237 transitions. [2024-11-02 19:56:40,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-02 19:56:40,643 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 19:56:40,643 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 19:56:40,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-02 19:56:40,643 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 19:56:40,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 19:56:40,643 INFO L85 PathProgramCache]: Analyzing trace with hash 45509775, now seen corresponding path program 1 times [2024-11-02 19:56:40,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-02 19:56:40,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606604614] [2024-11-02 19:56:40,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 19:56:40,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms