/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/array-examples/standard_sentinel.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 00:03:06,358 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 00:03:06,431 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-16 00:03:06,437 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 00:03:06,437 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 00:03:06,458 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 00:03:06,459 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 00:03:06,459 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 00:03:06,459 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 00:03:06,460 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 00:03:06,461 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 00:03:06,461 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 00:03:06,462 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 00:03:06,462 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 00:03:06,462 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 00:03:06,463 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 00:03:06,463 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 00:03:06,463 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 00:03:06,463 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-16 00:03:06,464 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 00:03:06,464 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 00:03:06,471 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 00:03:06,472 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 00:03:06,472 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 00:03:06,472 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 00:03:06,472 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 00:03:06,473 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 00:03:06,473 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 00:03:06,473 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 00:03:06,473 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 00:03:06,474 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 00:03:06,474 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 00:03:06,474 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 00:03:06,474 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 00:03:06,475 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 00:03:06,475 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 00:03:06,475 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-16 00:03:06,475 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-16 00:03:06,476 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 00:03:06,476 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 00:03:06,476 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 00:03:06,479 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 00:03:06,479 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 00:03:06,480 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-16 00:03:06,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 00:03:06,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 00:03:06,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 00:03:06,731 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 00:03:06,731 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 00:03:06,732 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_sentinel.i.v+cfa-reducer.c [2023-12-16 00:03:07,983 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 00:03:08,171 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 00:03:08,172 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_sentinel.i.v+cfa-reducer.c [2023-12-16 00:03:08,176 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06ddc564f/3c9279e6611144f2ade0084559c66653/FLAG7500562e8 [2023-12-16 00:03:08,199 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06ddc564f/3c9279e6611144f2ade0084559c66653 [2023-12-16 00:03:08,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 00:03:08,202 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 00:03:08,203 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 00:03:08,203 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 00:03:08,207 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 00:03:08,207 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:03:08" (1/1) ... [2023-12-16 00:03:08,208 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6fd585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:03:08, skipping insertion in model container [2023-12-16 00:03:08,208 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:03:08" (1/1) ... [2023-12-16 00:03:08,226 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 00:03:08,364 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2023-12-16 00:03:08,371 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 00:03:08,378 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 00:03:08,397 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2023-12-16 00:03:08,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 00:03:08,412 INFO L206 MainTranslator]: Completed translation [2023-12-16 00:03:08,415 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:03:08 WrapperNode [2023-12-16 00:03:08,415 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 00:03:08,416 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 00:03:08,417 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 00:03:08,417 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 00:03:08,422 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:03:08" (1/1) ... [2023-12-16 00:03:08,430 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:03:08" (1/1) ... [2023-12-16 00:03:08,443 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 73 [2023-12-16 00:03:08,443 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 00:03:08,444 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 00:03:08,444 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 00:03:08,444 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 00:03:08,451 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:03:08" (1/1) ... [2023-12-16 00:03:08,451 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:03:08" (1/1) ... [2023-12-16 00:03:08,453 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:03:08" (1/1) ... [2023-12-16 00:03:08,463 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2023-12-16 00:03:08,463 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:03:08" (1/1) ... [2023-12-16 00:03:08,463 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:03:08" (1/1) ... [2023-12-16 00:03:08,467 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:03:08" (1/1) ... [2023-12-16 00:03:08,469 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:03:08" (1/1) ... [2023-12-16 00:03:08,470 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:03:08" (1/1) ... [2023-12-16 00:03:08,470 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:03:08" (1/1) ... [2023-12-16 00:03:08,472 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 00:03:08,473 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 00:03:08,473 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 00:03:08,473 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 00:03:08,474 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:03:08" (1/1) ... [2023-12-16 00:03:08,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 00:03:08,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:03:08,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-16 00:03:08,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-16 00:03:08,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 00:03:08,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-16 00:03:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-16 00:03:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-16 00:03:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-16 00:03:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-16 00:03:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 00:03:08,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 00:03:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-16 00:03:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-16 00:03:08,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-16 00:03:08,583 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 00:03:08,584 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 00:03:08,692 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 00:03:08,724 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 00:03:08,725 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-16 00:03:08,725 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:03:08 BoogieIcfgContainer [2023-12-16 00:03:08,725 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 00:03:08,729 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 00:03:08,729 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 00:03:08,733 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 00:03:08,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 12:03:08" (1/3) ... [2023-12-16 00:03:08,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53cde4b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:03:08, skipping insertion in model container [2023-12-16 00:03:08,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:03:08" (2/3) ... [2023-12-16 00:03:08,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53cde4b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:03:08, skipping insertion in model container [2023-12-16 00:03:08,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:03:08" (3/3) ... [2023-12-16 00:03:08,735 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2023-12-16 00:03:08,748 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 00:03:08,749 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-16 00:03:08,790 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 00:03:08,795 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;@3c45d0b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 00:03:08,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-16 00:03:08,798 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:08,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-16 00:03:08,803 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:03:08,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:03:08,804 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:03:08,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:03:08,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1284800003, now seen corresponding path program 1 times [2023-12-16 00:03:08,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:03:08,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39532061] [2023-12-16 00:03:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:03:08,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:03:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:03:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:03:09,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:03:09,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39532061] [2023-12-16 00:03:09,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39532061] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:03:09,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:03:09,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-16 00:03:09,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40005427] [2023-12-16 00:03:09,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:03:09,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 00:03:09,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:03:09,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 00:03:09,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:03:09,118 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:09,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:03:09,141 INFO L93 Difference]: Finished difference Result 23 states and 33 transitions. [2023-12-16 00:03:09,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 00:03:09,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-16 00:03:09,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:03:09,154 INFO L225 Difference]: With dead ends: 23 [2023-12-16 00:03:09,155 INFO L226 Difference]: Without dead ends: 11 [2023-12-16 00:03:09,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:03:09,160 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:03:09,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:03:09,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-12-16 00:03:09,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-12-16 00:03:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:09,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-12-16 00:03:09,196 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2023-12-16 00:03:09,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:03:09,196 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-12-16 00:03:09,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:09,197 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-12-16 00:03:09,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-16 00:03:09,198 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:03:09,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:03:09,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-16 00:03:09,199 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:03:09,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:03:09,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1330956527, now seen corresponding path program 1 times [2023-12-16 00:03:09,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:03:09,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641203710] [2023-12-16 00:03:09,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:03:09,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:03:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:03:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:03:09,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:03:09,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641203710] [2023-12-16 00:03:09,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641203710] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:03:09,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954666510] [2023-12-16 00:03:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:03:09,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:03:09,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:03:09,323 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) [2023-12-16 00:03:09,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-16 00:03:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:03:09,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-16 00:03:09,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:03:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:03:09,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:03:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:03:09,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954666510] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:03:09,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:03:09,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-16 00:03:09,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188859892] [2023-12-16 00:03:09,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:03:09,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-16 00:03:09,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:03:09,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-16 00:03:09,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-16 00:03:09,488 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:09,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:03:09,519 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2023-12-16 00:03:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-16 00:03:09,520 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-16 00:03:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:03:09,521 INFO L225 Difference]: With dead ends: 22 [2023-12-16 00:03:09,521 INFO L226 Difference]: Without dead ends: 14 [2023-12-16 00:03:09,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-16 00:03:09,523 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:03:09,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:03:09,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-12-16 00:03:09,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-12-16 00:03:09,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:09,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-12-16 00:03:09,531 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2023-12-16 00:03:09,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:03:09,532 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-12-16 00:03:09,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:09,533 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-12-16 00:03:09,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-16 00:03:09,534 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:03:09,534 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:03:09,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-16 00:03:09,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:03:09,739 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:03:09,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:03:09,740 INFO L85 PathProgramCache]: Analyzing trace with hash -533059843, now seen corresponding path program 2 times [2023-12-16 00:03:09,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:03:09,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934645959] [2023-12-16 00:03:09,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:03:09,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:03:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:03:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-16 00:03:09,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:03:09,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934645959] [2023-12-16 00:03:09,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934645959] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:03:09,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:03:09,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-16 00:03:09,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936071289] [2023-12-16 00:03:09,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:03:09,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-16 00:03:09,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:03:09,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-16 00:03:09,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:03:09,922 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:09,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:03:09,970 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2023-12-16 00:03:09,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-16 00:03:09,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-16 00:03:09,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:03:09,971 INFO L225 Difference]: With dead ends: 19 [2023-12-16 00:03:09,971 INFO L226 Difference]: Without dead ends: 16 [2023-12-16 00:03:09,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-16 00:03:09,976 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:03:09,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:03:09,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-16 00:03:09,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-16 00:03:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:09,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-12-16 00:03:09,983 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2023-12-16 00:03:09,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:03:09,983 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-12-16 00:03:09,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:09,984 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-12-16 00:03:09,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-16 00:03:09,984 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:03:09,984 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:03:09,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-16 00:03:09,985 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:03:09,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:03:09,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1171489088, now seen corresponding path program 1 times [2023-12-16 00:03:09,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:03:09,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538516566] [2023-12-16 00:03:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:03:09,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:03:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:03:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-16 00:03:10,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:03:10,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538516566] [2023-12-16 00:03:10,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538516566] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:03:10,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940060408] [2023-12-16 00:03:10,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:03:10,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:03:10,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:03:10,109 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) [2023-12-16 00:03:10,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-16 00:03:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:03:10,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-16 00:03:10,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:03:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-16 00:03:10,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:03:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-16 00:03:10,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940060408] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:03:10,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:03:10,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-16 00:03:10,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743214838] [2023-12-16 00:03:10,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:03:10,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-16 00:03:10,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:03:10,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-16 00:03:10,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-16 00:03:10,297 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:10,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:03:10,321 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2023-12-16 00:03:10,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-16 00:03:10,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-16 00:03:10,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:03:10,323 INFO L225 Difference]: With dead ends: 32 [2023-12-16 00:03:10,324 INFO L226 Difference]: Without dead ends: 22 [2023-12-16 00:03:10,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-16 00:03:10,327 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:03:10,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:03:10,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-16 00:03:10,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-16 00:03:10,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:10,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-12-16 00:03:10,333 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2023-12-16 00:03:10,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:03:10,334 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-12-16 00:03:10,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:10,334 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-12-16 00:03:10,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-16 00:03:10,335 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:03:10,335 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:03:10,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-16 00:03:10,540 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,SelfDestructingSolverStorable3 [2023-12-16 00:03:10,541 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:03:10,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:03:10,541 INFO L85 PathProgramCache]: Analyzing trace with hash -795285952, now seen corresponding path program 2 times [2023-12-16 00:03:10,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:03:10,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23589567] [2023-12-16 00:03:10,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:03:10,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:03:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:03:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-16 00:03:10,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:03:10,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23589567] [2023-12-16 00:03:10,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23589567] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:03:10,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578570863] [2023-12-16 00:03:10,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 00:03:10,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:03:10,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:03:10,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:03:10,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-16 00:03:10,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 00:03:10,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:03:10,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-16 00:03:10,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:03:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-16 00:03:10,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:03:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-16 00:03:11,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578570863] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:03:11,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:03:11,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-12-16 00:03:11,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229661514] [2023-12-16 00:03:11,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:03:11,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-16 00:03:11,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:03:11,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-16 00:03:11,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-16 00:03:11,103 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:11,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:03:11,134 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2023-12-16 00:03:11,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-16 00:03:11,135 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-16 00:03:11,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:03:11,136 INFO L225 Difference]: With dead ends: 44 [2023-12-16 00:03:11,136 INFO L226 Difference]: Without dead ends: 34 [2023-12-16 00:03:11,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-16 00:03:11,137 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:03:11,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:03:11,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-16 00:03:11,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-12-16 00:03:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:11,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2023-12-16 00:03:11,144 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 21 [2023-12-16 00:03:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:03:11,144 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2023-12-16 00:03:11,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:11,146 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2023-12-16 00:03:11,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-16 00:03:11,147 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:03:11,148 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:03:11,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-16 00:03:11,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:03:11,353 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:03:11,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:03:11,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1216795968, now seen corresponding path program 3 times [2023-12-16 00:03:11,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:03:11,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643959250] [2023-12-16 00:03:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:03:11,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:03:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:03:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-16 00:03:11,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:03:11,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643959250] [2023-12-16 00:03:11,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643959250] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:03:11,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789626107] [2023-12-16 00:03:11,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 00:03:11,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:03:11,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:03:11,912 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:03:11,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-16 00:03:11,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-16 00:03:11,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:03:11,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-16 00:03:11,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:03:12,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-16 00:03:12,091 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:03:12,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-12-16 00:03:12,197 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-16 00:03:12,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:03:12,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-12-16 00:03:12,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2023-12-16 00:03:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-16 00:03:12,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789626107] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:03:12,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:03:12,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 34 [2023-12-16 00:03:12,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852208502] [2023-12-16 00:03:12,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:03:12,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-16 00:03:12,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:03:12,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-16 00:03:12,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=793, Unknown=0, NotChecked=0, Total=1122 [2023-12-16 00:03:12,316 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:12,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:03:12,526 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2023-12-16 00:03:12,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-16 00:03:12,526 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-12-16 00:03:12,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:03:12,527 INFO L225 Difference]: With dead ends: 51 [2023-12-16 00:03:12,527 INFO L226 Difference]: Without dead ends: 39 [2023-12-16 00:03:12,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2023-12-16 00:03:12,529 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 00:03:12,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 37 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 00:03:12,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-16 00:03:12,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-12-16 00:03:12,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:12,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2023-12-16 00:03:12,534 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 33 [2023-12-16 00:03:12,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:03:12,534 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2023-12-16 00:03:12,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:12,535 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2023-12-16 00:03:12,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-16 00:03:12,535 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:03:12,536 INFO L195 NwaCegarLoop]: trace histogram [23, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:03:12,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-16 00:03:12,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:03:12,740 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:03:12,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:03:12,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1248449946, now seen corresponding path program 4 times [2023-12-16 00:03:12,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:03:12,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023759540] [2023-12-16 00:03:12,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:03:12,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:03:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:03:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-16 00:03:13,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:03:13,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023759540] [2023-12-16 00:03:13,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023759540] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:03:13,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102948444] [2023-12-16 00:03:13,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-16 00:03:13,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:03:13,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:03:13,327 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:03:13,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-16 00:03:13,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-16 00:03:13,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:03:13,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-16 00:03:13,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:03:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-16 00:03:13,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:03:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-16 00:03:14,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102948444] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:03:14,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:03:14,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2023-12-16 00:03:14,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964624840] [2023-12-16 00:03:14,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:03:14,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-16 00:03:14,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:03:14,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-16 00:03:14,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-12-16 00:03:14,300 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 51 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:14,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:03:14,361 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2023-12-16 00:03:14,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-16 00:03:14,361 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-16 00:03:14,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:03:14,362 INFO L225 Difference]: With dead ends: 78 [2023-12-16 00:03:14,362 INFO L226 Difference]: Without dead ends: 64 [2023-12-16 00:03:14,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-12-16 00:03:14,364 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:03:14,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:03:14,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-16 00:03:14,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-12-16 00:03:14,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2023-12-16 00:03:14,371 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 38 [2023-12-16 00:03:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:03:14,371 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2023-12-16 00:03:14,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2023-12-16 00:03:14,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-16 00:03:14,373 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:03:14,373 INFO L195 NwaCegarLoop]: trace histogram [48, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:03:14,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-16 00:03:14,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:03:14,584 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:03:14,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:03:14,584 INFO L85 PathProgramCache]: Analyzing trace with hash 40994566, now seen corresponding path program 5 times [2023-12-16 00:03:14,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:03:14,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571726545] [2023-12-16 00:03:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:03:14,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:03:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:03:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-16 00:03:16,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:03:16,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571726545] [2023-12-16 00:03:16,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571726545] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:03:16,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325488929] [2023-12-16 00:03:16,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-16 00:03:16,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:03:16,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:03:16,421 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:03:16,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-16 00:03:28,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2023-12-16 00:03:28,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:03:28,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-16 00:03:28,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:03:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-16 00:03:28,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:03:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-16 00:03:31,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325488929] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:03:31,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:03:31,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2023-12-16 00:03:31,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511584384] [2023-12-16 00:03:31,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:03:31,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-12-16 00:03:31,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:03:31,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-12-16 00:03:31,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-12-16 00:03:31,016 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 101 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 100 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:31,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:03:31,152 INFO L93 Difference]: Finished difference Result 128 states and 179 transitions. [2023-12-16 00:03:31,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-12-16 00:03:31,152 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 100 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-12-16 00:03:31,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:03:31,155 INFO L225 Difference]: With dead ends: 128 [2023-12-16 00:03:31,155 INFO L226 Difference]: Without dead ends: 114 [2023-12-16 00:03:31,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-12-16 00:03:31,159 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 00:03:31,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 00:03:31,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-16 00:03:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-12-16 00:03:31,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2023-12-16 00:03:31,176 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 63 [2023-12-16 00:03:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:03:31,176 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2023-12-16 00:03:31,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 100 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:31,176 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2023-12-16 00:03:31,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-16 00:03:31,178 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:03:31,178 INFO L195 NwaCegarLoop]: trace histogram [98, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:03:31,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-16 00:03:31,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:03:31,379 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:03:31,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:03:31,379 INFO L85 PathProgramCache]: Analyzing trace with hash -788789882, now seen corresponding path program 6 times [2023-12-16 00:03:31,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:03:31,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058499357] [2023-12-16 00:03:31,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:03:31,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:03:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:03:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4863 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-16 00:03:37,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:03:37,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058499357] [2023-12-16 00:03:37,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058499357] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:03:37,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965356406] [2023-12-16 00:03:37,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-16 00:03:37,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:03:37,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:03:37,073 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:03:37,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-16 00:03:37,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-16 00:03:37,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:03:37,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-16 00:03:37,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:03:37,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-16 00:03:37,956 INFO L349 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2023-12-16 00:03:37,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 55 [2023-12-16 00:03:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4863 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2023-12-16 00:03:38,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:03:38,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2023-12-16 00:03:39,013 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:03:39,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 58 [2023-12-16 00:03:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4863 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2023-12-16 00:03:39,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965356406] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:03:39,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:03:39,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 11, 11] total 118 [2023-12-16 00:03:39,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044369925] [2023-12-16 00:03:39,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:03:39,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2023-12-16 00:03:39,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:03:39,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2023-12-16 00:03:39,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5134, Invalid=8672, Unknown=0, NotChecked=0, Total=13806 [2023-12-16 00:03:39,078 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 118 states, 118 states have (on average 1.1271186440677967) internal successors, (133), 118 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:40,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:03:40,418 INFO L93 Difference]: Finished difference Result 141 states and 147 transitions. [2023-12-16 00:03:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-12-16 00:03:40,418 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.1271186440677967) internal successors, (133), 118 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2023-12-16 00:03:40,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:03:40,419 INFO L225 Difference]: With dead ends: 141 [2023-12-16 00:03:40,419 INFO L226 Difference]: Without dead ends: 123 [2023-12-16 00:03:40,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5293, Invalid=11477, Unknown=0, NotChecked=0, Total=16770 [2023-12-16 00:03:40,423 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 00:03:40,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 57 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 00:03:40,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-12-16 00:03:40,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2023-12-16 00:03:40,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:40,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2023-12-16 00:03:40,448 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 113 [2023-12-16 00:03:40,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:03:40,448 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2023-12-16 00:03:40,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.1271186440677967) internal successors, (133), 118 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:40,449 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2023-12-16 00:03:40,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-16 00:03:40,453 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:03:40,454 INFO L195 NwaCegarLoop]: trace histogram [99, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:03:40,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-16 00:03:40,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:03:40,655 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:03:40,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:03:40,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1201228838, now seen corresponding path program 7 times [2023-12-16 00:03:40,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:03:40,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946809670] [2023-12-16 00:03:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:03:40,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:03:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:03:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5006 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-16 00:03:46,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:03:46,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946809670] [2023-12-16 00:03:46,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946809670] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:03:46,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363511113] [2023-12-16 00:03:46,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-16 00:03:46,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:03:46,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:03:46,169 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:03:46,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-16 00:03:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:03:46,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 101 conjunts are in the unsatisfiable core [2023-12-16 00:03:46,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:03:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5006 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-16 00:03:46,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:03:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5006 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-16 00:03:56,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363511113] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:03:56,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:03:56,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2023-12-16 00:03:56,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712521424] [2023-12-16 00:03:56,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:03:56,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-12-16 00:03:56,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:03:56,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-12-16 00:03:56,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-12-16 00:03:56,537 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 203 states, 203 states have (on average 1.0443349753694582) internal successors, (212), 202 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:56,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:03:56,848 INFO L93 Difference]: Finished difference Result 246 states and 348 transitions. [2023-12-16 00:03:56,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-12-16 00:03:56,849 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0443349753694582) internal successors, (212), 202 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2023-12-16 00:03:56,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:03:56,850 INFO L225 Difference]: With dead ends: 246 [2023-12-16 00:03:56,850 INFO L226 Difference]: Without dead ends: 224 [2023-12-16 00:03:56,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-12-16 00:03:56,854 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 00:03:56,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 00:03:56,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-12-16 00:03:56,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2023-12-16 00:03:56,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0089686098654709) internal successors, (225), 223 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2023-12-16 00:03:56,865 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 122 [2023-12-16 00:03:56,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:03:56,865 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2023-12-16 00:03:56,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0443349753694582) internal successors, (212), 202 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:03:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2023-12-16 00:03:56,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-12-16 00:03:56,867 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:03:56,867 INFO L195 NwaCegarLoop]: trace histogram [200, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:03:56,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-16 00:03:57,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-16 00:03:57,075 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:03:57,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:03:57,075 INFO L85 PathProgramCache]: Analyzing trace with hash 254062226, now seen corresponding path program 8 times [2023-12-16 00:03:57,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:03:57,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774021247] [2023-12-16 00:03:57,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:03:57,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:03:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2023-12-16 00:04:07,036 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-16 00:04:07,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-16 00:04:07,037 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 224 with TraceHistMax 200,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 105 known predicates. [2023-12-16 00:04:07,043 INFO L445 BasicCegarLoop]: Path program histogram: [8, 2, 1] [2023-12-16 00:04:07,045 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-16 00:04:07,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 12:04:07 BoogieIcfgContainer [2023-12-16 00:04:07,047 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-16 00:04:07,048 INFO L158 Benchmark]: Toolchain (without parser) took 58845.46ms. Allocated memory was 267.4MB in the beginning and 1.1GB in the end (delta: 859.8MB). Free memory was 219.3MB in the beginning and 877.8MB in the end (delta: -658.6MB). Peak memory consumption was 202.2MB. Max. memory is 8.0GB. [2023-12-16 00:04:07,048 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 168.8MB. Free memory was 113.7MB in the beginning and 113.6MB in the end (delta: 164.8kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 00:04:07,048 INFO L158 Benchmark]: CACSL2BoogieTranslator took 212.58ms. Allocated memory is still 267.4MB. Free memory was 219.3MB in the beginning and 208.2MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-16 00:04:07,048 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.96ms. Allocated memory is still 267.4MB. Free memory was 208.2MB in the beginning and 206.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-16 00:04:07,049 INFO L158 Benchmark]: Boogie Preprocessor took 28.17ms. Allocated memory is still 267.4MB. Free memory was 206.7MB in the beginning and 204.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 00:04:07,049 INFO L158 Benchmark]: RCFGBuilder took 252.54ms. Allocated memory is still 267.4MB. Free memory was 204.6MB in the beginning and 192.5MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-16 00:04:07,049 INFO L158 Benchmark]: TraceAbstraction took 58318.54ms. Allocated memory was 267.4MB in the beginning and 1.1GB in the end (delta: 859.8MB). Free memory was 192.0MB in the beginning and 877.8MB in the end (delta: -685.8MB). Peak memory consumption was 174.9MB. Max. memory is 8.0GB. [2023-12-16 00:04:07,050 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 168.8MB. Free memory was 113.7MB in the beginning and 113.6MB in the end (delta: 164.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 212.58ms. Allocated memory is still 267.4MB. Free memory was 219.3MB in the beginning and 208.2MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.96ms. Allocated memory is still 267.4MB. Free memory was 208.2MB in the beginning and 206.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.17ms. Allocated memory is still 267.4MB. Free memory was 206.7MB in the beginning and 204.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 252.54ms. Allocated memory is still 267.4MB. Free memory was 204.6MB in the beginning and 192.5MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 58318.54ms. Allocated memory was 267.4MB in the beginning and 1.1GB in the end (delta: 859.8MB). Free memory was 192.0MB in the beginning and 877.8MB in the end (delta: -685.8MB). Peak memory consumption was 174.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 43]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 43). Cancelled while NwaCegarLoop was analyzing trace of length 224 with TraceHistMax 200,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 105 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 58.3s, OverallIterations: 11, TraceHistogramMax: 200, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 53 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 53 mSDsluCounter, 339 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 258 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 788 IncrementalHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 81 mSDtfsCounter, 788 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1162 GetRequests, 600 SyntacticMatches, 2 SemanticMatches, 560 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3014 ImplicationChecksByTransitivity, 24.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=224occurred in iteration=10, InterpolantAutomatonStates: 554, 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, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 12.2s SatisfiabilityAnalysisTime, 30.7s InterpolantComputationTime, 852 NumberOfCodeBlocks, 746 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 1241 ConstructedInterpolants, 5 QuantifiedInterpolants, 3131 SizeOfPredicates, 21 NumberOfNonLiveVariables, 2398 ConjunctsInSsa, 241 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 10484/35020 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout [2023-12-16 00:04:07,064 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 00:04:07,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Completed graceful shutdown