/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 11:07:42,151 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 11:07:42,211 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 11:07:42,215 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 11:07:42,215 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 11:07:42,240 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 11:07:42,241 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 11:07:42,241 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 11:07:42,241 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 11:07:42,244 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 11:07:42,245 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 11:07:42,245 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 11:07:42,246 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 11:07:42,247 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 11:07:42,247 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 11:07:42,247 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 11:07:42,247 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 11:07:42,247 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 11:07:42,248 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 11:07:42,249 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 11:07:42,249 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 11:07:42,249 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 11:07:42,249 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 11:07:42,249 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 11:07:42,250 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 11:07:42,250 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 11:07:42,250 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 11:07:42,250 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 11:07:42,251 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 11:07:42,251 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 11:07:42,251 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 11:07:42,252 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 11:07:42,252 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 11:07:42,252 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 11:07:42,252 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 11:07:42,252 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 11:07:42,252 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 11:07:42,252 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 11:07:42,252 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 11:07:42,253 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 11:07:42,253 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 11:07:42,253 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 11:07:42,253 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 11:07:42,253 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 11:07:42,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 11:07:42,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 11:07:42,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 11:07:42,457 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 11:07:42,458 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 11:07:42,458 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c [2023-12-20 11:07:43,575 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 11:07:43,735 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 11:07:43,737 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-2a.c.cil.c [2023-12-20 11:07:43,744 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e21d0811d/e848beef6f244b61bc8b9f20fca9dceb/FLAGaf944a7bf [2023-12-20 11:07:44,137 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e21d0811d/e848beef6f244b61bc8b9f20fca9dceb [2023-12-20 11:07:44,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 11:07:44,139 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 11:07:44,140 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 11:07:44,140 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 11:07:44,143 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 11:07:44,144 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 11:07:44" (1/1) ... [2023-12-20 11:07:44,144 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c76b917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:07:44, skipping insertion in model container [2023-12-20 11:07:44,145 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 11:07:44" (1/1) ... [2023-12-20 11:07:44,170 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 11:07:44,266 WARN L239 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_1-2a.c.cil.c[755,768] [2023-12-20 11:07:44,319 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 11:07:44,327 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 11:07:44,336 WARN L239 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_1-2a.c.cil.c[755,768] [2023-12-20 11:07:44,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 11:07:44,397 INFO L206 MainTranslator]: Completed translation [2023-12-20 11:07:44,397 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:07:44 WrapperNode [2023-12-20 11:07:44,397 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 11:07:44,398 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 11:07:44,398 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 11:07:44,398 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 11:07:44,403 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:07:44" (1/1) ... [2023-12-20 11:07:44,408 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:07:44" (1/1) ... [2023-12-20 11:07:44,427 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 174 [2023-12-20 11:07:44,427 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 11:07:44,431 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 11:07:44,431 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 11:07:44,432 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 11:07:44,446 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:07:44" (1/1) ... [2023-12-20 11:07:44,446 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:07:44" (1/1) ... [2023-12-20 11:07:44,448 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:07:44" (1/1) ... [2023-12-20 11:07:44,458 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-20 11:07:44,460 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:07:44" (1/1) ... [2023-12-20 11:07:44,463 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:07:44" (1/1) ... [2023-12-20 11:07:44,466 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:07:44" (1/1) ... [2023-12-20 11:07:44,468 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:07:44" (1/1) ... [2023-12-20 11:07:44,469 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:07:44" (1/1) ... [2023-12-20 11:07:44,470 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:07:44" (1/1) ... [2023-12-20 11:07:44,472 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 11:07:44,472 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 11:07:44,472 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 11:07:44,472 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 11:07:44,473 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:07:44" (1/1) ... [2023-12-20 11:07:44,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 11:07:44,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 11:07:44,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-20 11:07:44,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-20 11:07:44,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 11:07:44,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 11:07:44,532 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-12-20 11:07:44,533 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-12-20 11:07:44,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 11:07:44,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 11:07:44,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-20 11:07:44,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-20 11:07:44,604 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 11:07:44,606 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 11:07:44,849 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 11:07:44,869 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 11:07:44,870 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-20 11:07:44,870 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 11:07:44 BoogieIcfgContainer [2023-12-20 11:07:44,870 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 11:07:44,872 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 11:07:44,872 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 11:07:44,881 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 11:07:44,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 11:07:44" (1/3) ... [2023-12-20 11:07:44,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abe6d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 11:07:44, skipping insertion in model container [2023-12-20 11:07:44,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:07:44" (2/3) ... [2023-12-20 11:07:44,883 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abe6d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 11:07:44, skipping insertion in model container [2023-12-20 11:07:44,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 11:07:44" (3/3) ... [2023-12-20 11:07:44,884 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2023-12-20 11:07:44,896 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 11:07:44,896 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 11:07:44,930 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 11:07:44,934 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@40bd7825, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 11:07:44,935 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 11:07:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 56 states have (on average 1.6428571428571428) internal successors, (92), 59 states have internal predecessors, (92), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-20 11:07:44,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-20 11:07:44,946 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:07:44,946 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:07:44,947 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:07:44,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:07:44,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1870388766, now seen corresponding path program 1 times [2023-12-20 11:07:44,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:07:44,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480032333] [2023-12-20 11:07:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:07:44,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:07:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:45,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 11:07:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:45,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 11:07:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:45,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 11:07:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-20 11:07:45,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:07:45,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480032333] [2023-12-20 11:07:45,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480032333] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 11:07:45,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939460100] [2023-12-20 11:07:45,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:07:45,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 11:07:45,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 11:07:45,448 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 11:07:45,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 11:07:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:45,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-20 11:07:45,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 11:07:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 11:07:45,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 11:07:45,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-20 11:07:45,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939460100] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 11:07:45,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 11:07:45,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 16 [2023-12-20 11:07:45,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154794533] [2023-12-20 11:07:45,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 11:07:45,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-20 11:07:45,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:07:45,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-20 11:07:45,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-12-20 11:07:45,805 INFO L87 Difference]: Start difference. First operand has 68 states, 56 states have (on average 1.6428571428571428) internal successors, (92), 59 states have internal predecessors, (92), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-20 11:07:46,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:07:46,158 INFO L93 Difference]: Finished difference Result 188 states and 320 transitions. [2023-12-20 11:07:46,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-20 11:07:46,160 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2023-12-20 11:07:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:07:46,168 INFO L225 Difference]: With dead ends: 188 [2023-12-20 11:07:46,168 INFO L226 Difference]: Without dead ends: 119 [2023-12-20 11:07:46,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2023-12-20 11:07:46,174 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 116 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 11:07:46,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 932 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 11:07:46,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-12-20 11:07:46,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 98. [2023-12-20 11:07:46,214 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), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2023-12-20 11:07:46,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 148 transitions. [2023-12-20 11:07:46,220 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 148 transitions. Word has length 28 [2023-12-20 11:07:46,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:07:46,221 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 148 transitions. [2023-12-20 11:07:46,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-20 11:07:46,222 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 148 transitions. [2023-12-20 11:07:46,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-20 11:07:46,225 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:07:46,225 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 11:07:46,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 11:07:46,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-20 11:07:46,431 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:07:46,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:07:46,432 INFO L85 PathProgramCache]: Analyzing trace with hash 377339095, now seen corresponding path program 1 times [2023-12-20 11:07:46,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:07:46,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487732783] [2023-12-20 11:07:46,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:07:46,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:07:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:46,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 11:07:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:46,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 11:07:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:46,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-20 11:07:46,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-20 11:07:46,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:07:46,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487732783] [2023-12-20 11:07:46,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487732783] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 11:07:46,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353300280] [2023-12-20 11:07:46,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:07:46,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 11:07:46,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 11:07:46,603 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 11:07:46,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 11:07:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:46,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-20 11:07:46,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 11:07:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 11:07:46,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 11:07:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-20 11:07:46,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353300280] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 11:07:46,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 11:07:46,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 11] total 18 [2023-12-20 11:07:46,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609364599] [2023-12-20 11:07:46,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 11:07:46,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-20 11:07:46,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:07:46,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-20 11:07:46,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-12-20 11:07:46,916 INFO L87 Difference]: Start difference. First operand 98 states and 148 transitions. Second operand has 18 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-20 11:07:47,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:07:47,272 INFO L93 Difference]: Finished difference Result 206 states and 317 transitions. [2023-12-20 11:07:47,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-20 11:07:47,272 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 32 [2023-12-20 11:07:47,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:07:47,273 INFO L225 Difference]: With dead ends: 206 [2023-12-20 11:07:47,274 INFO L226 Difference]: Without dead ends: 142 [2023-12-20 11:07:47,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2023-12-20 11:07:47,275 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 187 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 11:07:47,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 800 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 11:07:47,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-12-20 11:07:47,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 98. [2023-12-20 11:07:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 82 states have (on average 1.4268292682926829) internal successors, (117), 85 states have internal predecessors, (117), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2023-12-20 11:07:47,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 144 transitions. [2023-12-20 11:07:47,284 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 144 transitions. Word has length 32 [2023-12-20 11:07:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:07:47,285 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 144 transitions. [2023-12-20 11:07:47,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-20 11:07:47,285 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 144 transitions. [2023-12-20 11:07:47,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-20 11:07:47,286 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:07:47,286 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 11:07:47,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 11:07:47,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-20 11:07:47,494 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:07:47,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:07:47,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1672245559, now seen corresponding path program 1 times [2023-12-20 11:07:47,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:07:47,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450550351] [2023-12-20 11:07:47,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:07:47,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:07:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:47,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 11:07:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:47,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 11:07:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:47,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-20 11:07:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-20 11:07:47,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:07:47,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450550351] [2023-12-20 11:07:47,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450550351] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:07:47,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 11:07:47,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 11:07:47,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858333141] [2023-12-20 11:07:47,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:07:47,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 11:07:47,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:07:47,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 11:07:47,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-20 11:07:47,595 INFO L87 Difference]: Start difference. First operand 98 states and 144 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2023-12-20 11:07:47,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:07:47,646 INFO L93 Difference]: Finished difference Result 224 states and 334 transitions. [2023-12-20 11:07:47,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 11:07:47,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 36 [2023-12-20 11:07:47,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:07:47,648 INFO L225 Difference]: With dead ends: 224 [2023-12-20 11:07:47,648 INFO L226 Difference]: Without dead ends: 164 [2023-12-20 11:07:47,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-20 11:07:47,649 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 50 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 11:07:47,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 412 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 11:07:47,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-12-20 11:07:47,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2023-12-20 11:07:47,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 138 states have (on average 1.4057971014492754) internal successors, (194), 141 states have internal predecessors, (194), 17 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2023-12-20 11:07:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 233 transitions. [2023-12-20 11:07:47,659 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 233 transitions. Word has length 36 [2023-12-20 11:07:47,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:07:47,659 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 233 transitions. [2023-12-20 11:07:47,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2023-12-20 11:07:47,659 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 233 transitions. [2023-12-20 11:07:47,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-20 11:07:47,660 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:07:47,660 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 11:07:47,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 11:07:47,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:07:47,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:07:47,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1942663367, now seen corresponding path program 1 times [2023-12-20 11:07:47,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:07:47,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146572470] [2023-12-20 11:07:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:07:47,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:07:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:47,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 11:07:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:47,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 11:07:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:47,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-20 11:07:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-20 11:07:47,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:07:47,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146572470] [2023-12-20 11:07:47,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146572470] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:07:47,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 11:07:47,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 11:07:47,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270632333] [2023-12-20 11:07:47,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:07:47,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 11:07:47,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:07:47,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 11:07:47,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 11:07:47,745 INFO L87 Difference]: Start difference. First operand 160 states and 233 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2023-12-20 11:07:47,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:07:47,809 INFO L93 Difference]: Finished difference Result 208 states and 303 transitions. [2023-12-20 11:07:47,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 11:07:47,809 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 36 [2023-12-20 11:07:47,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:07:47,810 INFO L225 Difference]: With dead ends: 208 [2023-12-20 11:07:47,810 INFO L226 Difference]: Without dead ends: 154 [2023-12-20 11:07:47,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-20 11:07:47,812 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 37 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 11:07:47,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 484 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 11:07:47,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-12-20 11:07:47,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2023-12-20 11:07:47,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 130 states have (on average 1.3846153846153846) internal successors, (180), 133 states have internal predecessors, (180), 15 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (20), 17 states have call predecessors, (20), 14 states have call successors, (20) [2023-12-20 11:07:47,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 215 transitions. [2023-12-20 11:07:47,819 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 215 transitions. Word has length 36 [2023-12-20 11:07:47,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:07:47,819 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 215 transitions. [2023-12-20 11:07:47,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2023-12-20 11:07:47,820 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 215 transitions. [2023-12-20 11:07:47,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-20 11:07:47,821 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:07:47,821 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 11:07:47,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-20 11:07:47,821 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:07:47,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:07:47,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1434650185, now seen corresponding path program 1 times [2023-12-20 11:07:47,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:07:47,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972723672] [2023-12-20 11:07:47,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:07:47,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:07:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:47,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 11:07:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:47,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 11:07:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:47,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 11:07:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 11:07:47,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:07:47,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972723672] [2023-12-20 11:07:47,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972723672] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:07:47,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 11:07:47,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 11:07:47,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983813393] [2023-12-20 11:07:47,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:07:47,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 11:07:47,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:07:47,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 11:07:47,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 11:07:47,859 INFO L87 Difference]: Start difference. First operand 150 states and 215 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2023-12-20 11:07:47,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:07:47,879 INFO L93 Difference]: Finished difference Result 198 states and 287 transitions. [2023-12-20 11:07:47,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 11:07:47,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 38 [2023-12-20 11:07:47,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:07:47,881 INFO L225 Difference]: With dead ends: 198 [2023-12-20 11:07:47,881 INFO L226 Difference]: Without dead ends: 156 [2023-12-20 11:07:47,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 11:07:47,882 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 47 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 11:07:47,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 283 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 11:07:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-12-20 11:07:47,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 130. [2023-12-20 11:07:47,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 114 states have (on average 1.3421052631578947) internal successors, (153), 115 states have internal predecessors, (153), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (16), 13 states have call predecessors, (16), 10 states have call successors, (16) [2023-12-20 11:07:47,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 180 transitions. [2023-12-20 11:07:47,888 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 180 transitions. Word has length 38 [2023-12-20 11:07:47,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:07:47,888 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 180 transitions. [2023-12-20 11:07:47,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2023-12-20 11:07:47,888 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 180 transitions. [2023-12-20 11:07:47,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-20 11:07:47,889 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:07:47,889 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 11:07:47,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-20 11:07:47,889 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:07:47,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:07:47,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1087292815, now seen corresponding path program 1 times [2023-12-20 11:07:47,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:07:47,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718639324] [2023-12-20 11:07:47,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:07:47,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:07:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:47,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 11:07:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:47,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 11:07:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:47,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 11:07:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 11:07:47,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:07:47,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718639324] [2023-12-20 11:07:47,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718639324] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:07:47,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 11:07:47,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 11:07:47,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930921013] [2023-12-20 11:07:47,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:07:47,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 11:07:47,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:07:47,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 11:07:47,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 11:07:47,951 INFO L87 Difference]: Start difference. First operand 130 states and 180 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2023-12-20 11:07:47,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:07:47,987 INFO L93 Difference]: Finished difference Result 147 states and 201 transitions. [2023-12-20 11:07:47,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 11:07:47,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 39 [2023-12-20 11:07:47,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:07:47,989 INFO L225 Difference]: With dead ends: 147 [2023-12-20 11:07:47,989 INFO L226 Difference]: Without dead ends: 140 [2023-12-20 11:07:47,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 11:07:47,992 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 17 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 11:07:47,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 284 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 11:07:47,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-12-20 11:07:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2023-12-20 11:07:47,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 118 states have (on average 1.3305084745762712) internal successors, (157), 119 states have internal predecessors, (157), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (16), 13 states have call predecessors, (16), 10 states have call successors, (16) [2023-12-20 11:07:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 184 transitions. [2023-12-20 11:07:47,996 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 184 transitions. Word has length 39 [2023-12-20 11:07:47,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:07:47,996 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 184 transitions. [2023-12-20 11:07:47,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2023-12-20 11:07:47,996 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 184 transitions. [2023-12-20 11:07:47,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-20 11:07:47,997 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:07:47,997 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 11:07:47,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-20 11:07:47,997 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:07:47,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:07:47,997 INFO L85 PathProgramCache]: Analyzing trace with hash 687714547, now seen corresponding path program 1 times [2023-12-20 11:07:47,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:07:47,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148546734] [2023-12-20 11:07:47,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:07:47,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:07:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:48,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 11:07:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:48,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 11:07:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:48,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 11:07:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 11:07:48,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:07:48,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148546734] [2023-12-20 11:07:48,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148546734] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:07:48,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 11:07:48,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 11:07:48,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169042843] [2023-12-20 11:07:48,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:07:48,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 11:07:48,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:07:48,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 11:07:48,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 11:07:48,058 INFO L87 Difference]: Start difference. First operand 134 states and 184 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2023-12-20 11:07:48,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:07:48,078 INFO L93 Difference]: Finished difference Result 141 states and 190 transitions. [2023-12-20 11:07:48,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 11:07:48,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 39 [2023-12-20 11:07:48,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:07:48,079 INFO L225 Difference]: With dead ends: 141 [2023-12-20 11:07:48,079 INFO L226 Difference]: Without dead ends: 134 [2023-12-20 11:07:48,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-20 11:07:48,080 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 5 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 11:07:48,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 366 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 11:07:48,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-12-20 11:07:48,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2023-12-20 11:07:48,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 114 states have (on average 1.3157894736842106) internal successors, (150), 115 states have internal predecessors, (150), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (16), 13 states have call predecessors, (16), 10 states have call successors, (16) [2023-12-20 11:07:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 177 transitions. [2023-12-20 11:07:48,086 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 177 transitions. Word has length 39 [2023-12-20 11:07:48,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:07:48,087 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 177 transitions. [2023-12-20 11:07:48,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2023-12-20 11:07:48,087 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 177 transitions. [2023-12-20 11:07:48,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-20 11:07:48,089 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:07:48,089 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 11:07:48,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-20 11:07:48,089 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:07:48,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:07:48,092 INFO L85 PathProgramCache]: Analyzing trace with hash 676150810, now seen corresponding path program 1 times [2023-12-20 11:07:48,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:07:48,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197916603] [2023-12-20 11:07:48,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:07:48,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:07:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:48,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 11:07:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:48,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 11:07:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:48,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-20 11:07:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:07:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 11:07:48,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:07:48,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197916603] [2023-12-20 11:07:48,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197916603] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:07:48,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 11:07:48,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 11:07:48,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055015899] [2023-12-20 11:07:48,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:07:48,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 11:07:48,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:07:48,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 11:07:48,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 11:07:48,136 INFO L87 Difference]: Start difference. First operand 130 states and 177 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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) [2023-12-20 11:07:48,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:07:48,157 INFO L93 Difference]: Finished difference Result 207 states and 286 transitions. [2023-12-20 11:07:48,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 11:07:48,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 40 [2023-12-20 11:07:48,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:07:48,158 INFO L225 Difference]: With dead ends: 207 [2023-12-20 11:07:48,158 INFO L226 Difference]: Without dead ends: 167 [2023-12-20 11:07:48,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 11:07:48,160 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 78 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 11:07:48,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 284 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 11:07:48,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-12-20 11:07:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 139. [2023-12-20 11:07:48,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 123 states have (on average 1.3089430894308942) internal successors, (161), 123 states have internal predecessors, (161), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (16), 13 states have call predecessors, (16), 10 states have call successors, (16) [2023-12-20 11:07:48,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 188 transitions. [2023-12-20 11:07:48,166 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 188 transitions. Word has length 40 [2023-12-20 11:07:48,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:07:48,167 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 188 transitions. [2023-12-20 11:07:48,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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) [2023-12-20 11:07:48,167 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 188 transitions. [2023-12-20 11:07:48,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-20 11:07:48,168 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:07:48,168 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 11:07:48,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-20 11:07:48,168 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:07:48,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:07:48,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1680913172, now seen corresponding path program 2 times [2023-12-20 11:07:48,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:07:48,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693501785] [2023-12-20 11:07:48,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:07:48,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:07:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-20 11:07:48,197 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-20 11:07:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-20 11:07:48,228 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-20 11:07:48,229 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-20 11:07:48,229 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 11:07:48,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-20 11:07:48,232 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:07:48,234 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 11:07:48,276 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 11:07:48 BoogieIcfgContainer [2023-12-20 11:07:48,276 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 11:07:48,277 INFO L158 Benchmark]: Toolchain (without parser) took 4137.60ms. Allocated memory was 196.1MB in the beginning and 267.4MB in the end (delta: 71.3MB). Free memory was 154.4MB in the beginning and 183.0MB in the end (delta: -28.6MB). Peak memory consumption was 44.2MB. Max. memory is 8.0GB. [2023-12-20 11:07:48,277 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 196.1MB. Free memory is still 153.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 11:07:48,277 INFO L158 Benchmark]: CACSL2BoogieTranslator took 257.59ms. Allocated memory is still 196.1MB. Free memory was 154.0MB in the beginning and 139.7MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-20 11:07:48,277 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.86ms. Allocated memory is still 196.1MB. Free memory was 139.7MB in the beginning and 137.8MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 11:07:48,278 INFO L158 Benchmark]: Boogie Preprocessor took 40.36ms. Allocated memory is still 196.1MB. Free memory was 137.8MB in the beginning and 135.5MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 11:07:48,278 INFO L158 Benchmark]: RCFGBuilder took 397.83ms. Allocated memory is still 196.1MB. Free memory was 135.5MB in the beginning and 116.2MB in the end (delta: 19.3MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-12-20 11:07:48,278 INFO L158 Benchmark]: TraceAbstraction took 3404.97ms. Allocated memory was 196.1MB in the beginning and 267.4MB in the end (delta: 71.3MB). Free memory was 115.8MB in the beginning and 183.0MB in the end (delta: -67.3MB). Peak memory consumption was 5.5MB. Max. memory is 8.0GB. [2023-12-20 11:07:48,279 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 196.1MB. Free memory is still 153.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 257.59ms. Allocated memory is still 196.1MB. Free memory was 154.0MB in the beginning and 139.7MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 32.86ms. Allocated memory is still 196.1MB. Free memory was 139.7MB in the beginning and 137.8MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.36ms. Allocated memory is still 196.1MB. Free memory was 137.8MB in the beginning and 135.5MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 397.83ms. Allocated memory is still 196.1MB. Free memory was 135.5MB in the beginning and 116.2MB in the end (delta: 19.3MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * TraceAbstraction took 3404.97ms. Allocated memory was 196.1MB in the beginning and 267.4MB in the end (delta: 71.3MB). Free memory was 115.8MB in the beginning and 183.0MB in the end (delta: -67.3MB). Peak memory consumption was 5.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 18]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwise operation at line 109. Possible FailurePath: [L227] unsigned int a ; [L228] unsigned int ma = __VERIFIER_nondet_uint(); [L229] signed char ea = __VERIFIER_nondet_char(); [L230] unsigned int b ; [L231] unsigned int mb = __VERIFIER_nondet_uint(); [L232] signed char eb = __VERIFIER_nondet_char(); [L233] unsigned int r_add ; [L234] unsigned int zero ; [L235] int sa ; [L236] int sb ; [L237] int tmp ; [L238] int tmp___0 ; [L239] int tmp___1 ; [L240] int tmp___2 ; [L241] int tmp___3 ; [L242] int tmp___4 ; [L243] int tmp___5 ; [L244] int tmp___6 ; [L245] int tmp___7 ; [L246] int tmp___8 ; [L247] int tmp___9 ; [L248] int __retres23 ; VAL [ea=0, eb=0] [L252] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L30] COND TRUE ! m [L31] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L81] return (__retres4); [L252] RET, EXPR base2flt(0, 0) VAL [ea=0, eb=0] [L252] zero = base2flt(0, 0) [L253] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=0, \old(m)=1] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L30] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L36] COND FALSE !(m < 1U << 24U) [L58] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L60] COND FALSE !(m >= 1U << 25U) [L77] m = m & ~ (1U << 24U) [L78] res = m | ((unsigned int ) (e + 128) << 24U) [L79] __retres4 = res VAL [\old(e)=0, \old(m)=1, __retres4=1, e=0, m=2, res=1] [L81] return (__retres4); [L253] RET, EXPR base2flt(ma, ea) VAL [ea=0, eb=0, ma=1, zero=0] [L253] a = base2flt(ma, ea) [L254] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=0, \old(m)=1] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L30] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L36] COND FALSE !(m < 1U << 24U) [L58] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L60] COND FALSE !(m >= 1U << 25U) [L77] m = m & ~ (1U << 24U) [L78] res = m | ((unsigned int ) (e + 128) << 24U) [L79] __retres4 = res VAL [\old(e)=0, \old(m)=1, __retres4=4294967295, e=0, m=3, res=4294967295] [L81] return (__retres4); [L254] RET, EXPR base2flt(mb, eb) VAL [a=1, ea=0, eb=0, ma=1, mb=1, zero=0] [L254] b = base2flt(mb, eb) [L256] COND FALSE !(a < zero) VAL [a=1, b=4294967295, ea=0, eb=0, ma=1, mb=1, zero=0] [L259] COND TRUE a > zero [L260] tmp = 1 VAL [a=1, b=4294967295, ea=0, eb=0, ma=1, mb=1, tmp=1, zero=0] [L264] sa = tmp VAL [a=1, b=4294967295, ea=0, eb=0, ma=1, mb=1, sa=1, tmp=1, zero=0] [L266] COND FALSE !(b < zero) VAL [a=1, b=4294967295, ea=0, eb=0, ma=1, mb=1, sa=1, tmp=1, zero=0] [L269] COND TRUE b > zero [L270] tmp___0 = 1 VAL [a=1, b=4294967295, ea=0, eb=0, ma=1, mb=1, sa=1, tmp=1, tmp___0=1, zero=0] [L274] sb = tmp___0 VAL [a=1, b=4294967295, ea=0, eb=0, ma=1, mb=1, sa=1, sb=1, tmp=1, tmp___0=1, zero=0] [L277] CALL addflt(a, b) [L85] unsigned int res ; [L86] unsigned int ma ; [L87] unsigned int mb ; [L88] unsigned int delta ; [L89] int ea ; [L90] int eb ; [L91] unsigned int tmp ; [L92] unsigned int __retres10 ; VAL [\old(a)=1, \old(b)=4294967295, a=1, b=4294967295] [L95] COND TRUE a < b [L96] tmp = a [L97] a = b [L98] b = tmp VAL [\old(a)=1, \old(b)=4294967295, a=4294967295, b=1, tmp=1] [L102] COND FALSE !(! b) [L109] ma = a & ((1U << 24U) - 1U) [L110] ea = (int )(a >> 24U) - 128 [L111] ma = ma | (1U << 24U) [L112] mb = b & ((1U << 24U) - 1U) [L113] eb = (int )(b >> 24U) - 128 [L114] mb = mb | (1U << 24U) [L115] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L18] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 68 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.3s, OverallIterations: 9, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 550 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 537 mSDsluCounter, 3845 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3123 mSDsCounter, 44 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 947 IncrementalHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 44 mSolverCounterUnsat, 722 mSDtfsCounter, 947 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 244 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=160occurred in iteration=3, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 137 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 388 NumberOfCodeBlocks, 388 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 396 ConstructedInterpolants, 0 QuantifiedInterpolants, 710 SizeOfPredicates, 9 NumberOfNonLiveVariables, 254 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 118/144 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-12-20 11:07:48,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...