/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-le-max.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:34:45,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:34:45,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:34:45,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:34:45,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:34:45,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:34:45,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:34:45,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:34:45,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:34:45,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:34:45,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:34:45,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 18:34:45,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:34:45,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:34:45,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:34:45,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:34:45,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:34:45,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:34:45,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:34:45,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:34:45,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:34:45,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:34:45,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:34:45,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:34:45,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 18:34:45,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 18:34:45,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 18:34:45,409 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 18:34:45,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 18:34:45,411 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 18:34:45,411 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 18:34:45,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 18:34:45,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 18:34:45,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:34:45,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:34:45,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:34:45,417 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-21 18:34:45,437 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:34:45,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:34:45,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:34:45,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:34:45,439 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:34:45,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:34:45,439 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:34:45,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:34:45,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:34:45,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:34:45,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:34:45,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:34:45,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:34:45,440 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:34:45,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:34:45,440 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:34:45,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:34:45,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:34:45,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:34:45,441 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:34:45,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:34:45,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:34:45,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:34:45,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:34:45,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:34:45,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:34:45,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:34:45,442 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:34:45,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:34:45,442 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:34:45,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:34:45,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:34:45,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:34:45,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:34:45,748 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:34:45,749 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:34:45,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-le-max.wvr.bpl [2021-08-21 18:34:45,751 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-le-max.wvr.bpl' [2021-08-21 18:34:45,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:34:45,776 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:34:45,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:34:45,778 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:34:45,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:34:45,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:45" (1/1) ... [2021-08-21 18:34:45,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:45" (1/1) ... [2021-08-21 18:34:45,804 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:34:45,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:34:45,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:34:45,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:34:45,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:45" (1/1) ... [2021-08-21 18:34:45,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:45" (1/1) ... [2021-08-21 18:34:45,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:45" (1/1) ... [2021-08-21 18:34:45,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:45" (1/1) ... [2021-08-21 18:34:45,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:45" (1/1) ... [2021-08-21 18:34:45,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:45" (1/1) ... [2021-08-21 18:34:45,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:45" (1/1) ... [2021-08-21 18:34:45,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:34:45,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:34:45,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:34:45,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:34:45,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:45" (1/1) ... [2021-08-21 18:34:45,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:34:45,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:45,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 18:34:45,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 18:34:45,895 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:34:45,896 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:34:45,896 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:34:45,896 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:34:45,896 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:34:45,896 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:34:45,896 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:34:45,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:34:45,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:34:45,897 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 18:34:45,897 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 18:34:45,897 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 18:34:45,898 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 18:34:46,042 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:34:46,043 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 18:34:46,044 INFO L202 PluginConnector]: Adding new model min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:34:46 BoogieIcfgContainer [2021-08-21 18:34:46,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:34:46,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:34:46,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:34:46,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:34:46,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:45" (1/2) ... [2021-08-21 18:34:46,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68012603 and model type min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:34:46, skipping insertion in model container [2021-08-21 18:34:46,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:34:46" (2/2) ... [2021-08-21 18:34:46,051 INFO L111 eAbstractionObserver]: Analyzing ICFG min-le-max.wvr.bpl [2021-08-21 18:34:46,055 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:34:46,055 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:34:46,055 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:34:46,055 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:34:46,089 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 18:34:46,133 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:34:46,143 INFO L339 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, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 18:34:46,144 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 18:34:46,260 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 87 states have (on average 2.1264367816091956) internal successors, (185), 127 states have internal predecessors, (185), 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) [2021-08-21 18:34:46,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 18:34:46,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:46,269 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:46,269 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:46,274 INFO L82 PathProgramCache]: Analyzing trace with hash -155898567, now seen corresponding path program 1 times [2021-08-21 18:34:46,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:46,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368424732] [2021-08-21 18:34:46,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:46,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:46,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:46,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368424732] [2021-08-21 18:34:46,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368424732] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:34:46,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:34:46,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:34:46,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431432790] [2021-08-21 18:34:46,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:34:46,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:46,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:34:46,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:34:46,495 INFO L87 Difference]: Start difference. First operand has 128 states, 87 states have (on average 2.1264367816091956) internal successors, (185), 127 states have internal predecessors, (185), 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 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2021-08-21 18:34:46,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:46,575 INFO L93 Difference]: Finished difference Result 275 states and 390 transitions. [2021-08-21 18:34:46,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:34:46,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 15 [2021-08-21 18:34:46,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:46,585 INFO L225 Difference]: With dead ends: 275 [2021-08-21 18:34:46,585 INFO L226 Difference]: Without dead ends: 84 [2021-08-21 18:34:46,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:34:46,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-21 18:34:46,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2021-08-21 18:34:46,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.7974683544303798) internal successors, (142), 79 states have internal predecessors, (142), 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) [2021-08-21 18:34:46,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 142 transitions. [2021-08-21 18:34:46,625 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 142 transitions. Word has length 15 [2021-08-21 18:34:46,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:46,626 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 142 transitions. [2021-08-21 18:34:46,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2021-08-21 18:34:46,626 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 142 transitions. [2021-08-21 18:34:46,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 18:34:46,628 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:46,628 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:46,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:34:46,629 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:46,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:46,632 INFO L82 PathProgramCache]: Analyzing trace with hash 896823033, now seen corresponding path program 1 times [2021-08-21 18:34:46,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:46,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127706870] [2021-08-21 18:34:46,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:46,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:46,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:46,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127706870] [2021-08-21 18:34:46,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127706870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:46,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666755129] [2021-08-21 18:34:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:46,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:46,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:46,733 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) [2021-08-21 18:34:46,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 18:34:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:46,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 18:34:46,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:46,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666755129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:46,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:46,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-21 18:34:46,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688896030] [2021-08-21 18:34:46,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:34:46,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:46,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:34:46,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:34:46,974 INFO L87 Difference]: Start difference. First operand 80 states and 142 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2021-08-21 18:34:47,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:47,045 INFO L93 Difference]: Finished difference Result 143 states and 254 transitions. [2021-08-21 18:34:47,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:34:47,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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 18 [2021-08-21 18:34:47,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:47,051 INFO L225 Difference]: With dead ends: 143 [2021-08-21 18:34:47,051 INFO L226 Difference]: Without dead ends: 143 [2021-08-21 18:34:47,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:34:47,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-08-21 18:34:47,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 95. [2021-08-21 18:34:47,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.8936170212765957) internal successors, (178), 94 states have internal predecessors, (178), 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) [2021-08-21 18:34:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 178 transitions. [2021-08-21 18:34:47,073 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 178 transitions. Word has length 18 [2021-08-21 18:34:47,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:47,074 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 178 transitions. [2021-08-21 18:34:47,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2021-08-21 18:34:47,075 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 178 transitions. [2021-08-21 18:34:47,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 18:34:47,079 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:47,079 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:47,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 18:34:47,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:47,301 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:47,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:47,302 INFO L82 PathProgramCache]: Analyzing trace with hash 929481718, now seen corresponding path program 1 times [2021-08-21 18:34:47,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:47,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555820957] [2021-08-21 18:34:47,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:47,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:47,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:47,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555820957] [2021-08-21 18:34:47,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555820957] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:34:47,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:34:47,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:34:47,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120052222] [2021-08-21 18:34:47,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:34:47,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:47,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:34:47,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:34:47,352 INFO L87 Difference]: Start difference. First operand 95 states and 178 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-08-21 18:34:47,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:47,408 INFO L93 Difference]: Finished difference Result 111 states and 202 transitions. [2021-08-21 18:34:47,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:34:47,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 18 [2021-08-21 18:34:47,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:47,410 INFO L225 Difference]: With dead ends: 111 [2021-08-21 18:34:47,410 INFO L226 Difference]: Without dead ends: 109 [2021-08-21 18:34:47,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:34:47,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-21 18:34:47,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2021-08-21 18:34:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.9111111111111112) internal successors, (172), 90 states have internal predecessors, (172), 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) [2021-08-21 18:34:47,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 172 transitions. [2021-08-21 18:34:47,424 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 172 transitions. Word has length 18 [2021-08-21 18:34:47,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:47,424 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 172 transitions. [2021-08-21 18:34:47,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-08-21 18:34:47,425 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 172 transitions. [2021-08-21 18:34:47,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 18:34:47,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:47,425 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:47,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 18:34:47,426 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:47,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:47,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1620820658, now seen corresponding path program 2 times [2021-08-21 18:34:47,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:47,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435506185] [2021-08-21 18:34:47,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:47,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:47,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:47,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435506185] [2021-08-21 18:34:47,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435506185] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:34:47,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:34:47,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:34:47,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155190969] [2021-08-21 18:34:47,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:34:47,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:47,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:34:47,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:34:47,499 INFO L87 Difference]: Start difference. First operand 91 states and 172 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-08-21 18:34:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:47,535 INFO L93 Difference]: Finished difference Result 122 states and 225 transitions. [2021-08-21 18:34:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:34:47,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 18 [2021-08-21 18:34:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:47,536 INFO L225 Difference]: With dead ends: 122 [2021-08-21 18:34:47,537 INFO L226 Difference]: Without dead ends: 122 [2021-08-21 18:34:47,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:34:47,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-21 18:34:47,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2021-08-21 18:34:47,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.9108910891089108) internal successors, (193), 101 states have internal predecessors, (193), 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) [2021-08-21 18:34:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 193 transitions. [2021-08-21 18:34:47,544 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 193 transitions. Word has length 18 [2021-08-21 18:34:47,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:47,544 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 193 transitions. [2021-08-21 18:34:47,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-08-21 18:34:47,544 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 193 transitions. [2021-08-21 18:34:47,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 18:34:47,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:47,545 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:47,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 18:34:47,545 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:47,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:47,547 INFO L82 PathProgramCache]: Analyzing trace with hash 707471926, now seen corresponding path program 1 times [2021-08-21 18:34:47,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:47,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951631483] [2021-08-21 18:34:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:47,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:47,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:47,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951631483] [2021-08-21 18:34:47,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951631483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:47,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106443373] [2021-08-21 18:34:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:47,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:47,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:47,793 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) [2021-08-21 18:34:47,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 18:34:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:47,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 18:34:47,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:48,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2021-08-21 18:34:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:48,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106443373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:48,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:48,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 18:34:48,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837752440] [2021-08-21 18:34:48,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:34:48,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:48,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:34:48,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:34:48,136 INFO L87 Difference]: Start difference. First operand 102 states and 193 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 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) [2021-08-21 18:34:48,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:48,248 INFO L93 Difference]: Finished difference Result 178 states and 324 transitions. [2021-08-21 18:34:48,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:34:48,249 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 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 [2021-08-21 18:34:48,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:48,249 INFO L225 Difference]: With dead ends: 178 [2021-08-21 18:34:48,249 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 18:34:48,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:34:48,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 18:34:48,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 18:34:48,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-08-21 18:34:48,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 18:34:48,251 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-08-21 18:34:48,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:48,251 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 18:34:48,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 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) [2021-08-21 18:34:48,251 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 18:34:48,251 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 18:34:48,253 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:34:48,253 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 18:34:48,254 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 18:34:48,254 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 18:34:48,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 18:34:48,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:48,480 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:34:48,480 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:34:48,482 INFO L202 PluginConnector]: Adding new model min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:34:48 BasicIcfg [2021-08-21 18:34:48,482 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:34:48,483 INFO L168 Benchmark]: Toolchain (without parser) took 2706.86 ms. Allocated memory is still 183.5 MB. Free memory was 163.6 MB in the beginning and 109.4 MB in the end (delta: 54.2 MB). Peak memory consumption was 56.3 MB. Max. memory is 8.0 GB. [2021-08-21 18:34:48,484 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.48 ms. Allocated memory is still 183.5 MB. Free memory is still 164.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:34:48,484 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.98 ms. Allocated memory is still 183.5 MB. Free memory was 163.5 MB in the beginning and 162.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 18:34:48,484 INFO L168 Benchmark]: Boogie Preprocessor took 16.24 ms. Allocated memory is still 183.5 MB. Free memory was 162.0 MB in the beginning and 161.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:34:48,485 INFO L168 Benchmark]: RCFGBuilder took 222.06 ms. Allocated memory is still 183.5 MB. Free memory was 161.0 MB in the beginning and 150.0 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-08-21 18:34:48,486 INFO L168 Benchmark]: TraceAbstraction took 2436.11 ms. Allocated memory is still 183.5 MB. Free memory was 149.5 MB in the beginning and 109.4 MB in the end (delta: 40.1 MB). Peak memory consumption was 41.6 MB. Max. memory is 8.0 GB. [2021-08-21 18:34:48,487 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.48 ms. Allocated memory is still 183.5 MB. Free memory is still 164.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.98 ms. Allocated memory is still 183.5 MB. Free memory was 163.5 MB in the beginning and 162.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.24 ms. Allocated memory is still 183.5 MB. Free memory was 162.0 MB in the beginning and 161.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 222.06 ms. Allocated memory is still 183.5 MB. Free memory was 161.0 MB in the beginning and 150.0 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2436.11 ms. Allocated memory is still 183.5 MB. Free memory was 149.5 MB in the beginning and 109.4 MB in the end (delta: 40.1 MB). Peak memory consumption was 41.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 259, positive: 227, positive conditional: 227, positive unconditional: 0, negative: 32, negative conditional: 32, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 237, positive: 227, positive conditional: 0, positive unconditional: 227, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 70, positive: 68, positive conditional: 0, positive unconditional: 68, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 70, positive: 68, positive conditional: 0, positive unconditional: 68, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 10, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 237, positive: 159, positive conditional: 0, positive unconditional: 159, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 70, unknown conditional: 0, unknown unconditional: 70] , Statistics on independence cache: Total cache size (in pairs): 70, Positive cache size: 68, Positive conditional cache size: 0, Positive unconditional cache size: 68, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Independence queries for same thread: 22 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 52]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 41 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 2347.8ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 18.0ms, AutomataDifference: 402.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 113.4ms, PartialOrderReductionTime: 83.7ms, HoareTripleCheckerStatistics: 94 SDtfs, 136 SDslu, 175 SDs, 0 SdLazy, 174 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 159.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 177.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=128occurred in iteration=0, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 68.9ms AutomataMinimizationTime, 5 MinimizatonAttempts, 90 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 20.3ms SsaConstructionTime, 114.4ms SatisfiabilityAnalysisTime, 932.9ms InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 122 ConstructedInterpolants, 0 QuantifiedInterpolants, 550 SizeOfPredicates, 6 NumberOfNonLiveVariables, 101 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 2/8 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-21 18:34:48,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...