/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/incr-decr04.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 13:39:15,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 13:39:15,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 13:39:15,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 13:39:15,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 13:39:15,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 13:39:15,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 13:39:15,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 13:39:15,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 13:39:15,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 13:39:15,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 13:39:15,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 13:39:15,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 13:39:15,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 13:39:15,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 13:39:15,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 13:39:15,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 13:39:15,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 13:39:15,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 13:39:15,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 13:39:15,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 13:39:15,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 13:39:15,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 13:39:15,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 13:39:15,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-21 13:39:15,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-21 13:39:15,475 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-21 13:39:15,476 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-21 13:39:15,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-21 13:39:15,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-21 13:39:15,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 13:39:15,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 13:39:15,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 13:39:15,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 13:39:15,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 13:39:15,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 13:39:15,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 13:39:15,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 13:39:15,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 13:39:15,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 13:39:15,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 13:39:15,487 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.epf [2021-08-21 13:39:15,522 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 13:39:15,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 13:39:15,523 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 13:39:15,523 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 13:39:15,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 13:39:15,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 13:39:15,526 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 13:39:15,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 13:39:15,527 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 13:39:15,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 13:39:15,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 13:39:15,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 13:39:15,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 13:39:15,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 13:39:15,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 13:39:15,528 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 13:39:15,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 13:39:15,528 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 13:39:15,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 13:39:15,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 13:39:15,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 13:39:15,529 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 13:39:15,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 13:39:15,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:39:15,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 13:39:15,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 13:39:15,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 13:39:15,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 13:39:15,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 13:39:15,530 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 13:39:15,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 13:39:15,530 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 13:39:15,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 13:39:15,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 13:39:15,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 13:39:15,895 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 13:39:15,896 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 13:39:15,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/incr-decr04.bpl [2021-08-21 13:39:15,897 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/incr-decr04.bpl' [2021-08-21 13:39:15,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 13:39:15,921 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 13:39:15,921 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 13:39:15,921 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 13:39:15,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 13:39:15,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "incr-decr04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:15" (1/1) ... [2021-08-21 13:39:15,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "incr-decr04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:15" (1/1) ... [2021-08-21 13:39:15,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 13:39:15,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 13:39:15,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 13:39:15,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 13:39:15,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "incr-decr04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:15" (1/1) ... [2021-08-21 13:39:15,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "incr-decr04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:15" (1/1) ... [2021-08-21 13:39:15,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "incr-decr04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:15" (1/1) ... [2021-08-21 13:39:15,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "incr-decr04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:15" (1/1) ... [2021-08-21 13:39:15,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "incr-decr04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:15" (1/1) ... [2021-08-21 13:39:15,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "incr-decr04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:15" (1/1) ... [2021-08-21 13:39:15,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "incr-decr04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:15" (1/1) ... [2021-08-21 13:39:15,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 13:39:15,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 13:39:15,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 13:39:15,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 13:39:15,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "incr-decr04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:15" (1/1) ... [2021-08-21 13:39:15,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:39:15,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:39:15,998 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 13:39:16,026 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 13:39:16,049 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 13:39:16,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 13:39:16,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 13:39:16,050 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread given in one single declaration [2021-08-21 13:39:16,050 INFO L130 BoogieDeclarations]: Found specification of procedure Thread [2021-08-21 13:39:16,050 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread [2021-08-21 13:39:16,051 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 13:39:16,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 13:39:16,168 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-21 13:39:16,169 INFO L202 PluginConnector]: Adding new model incr-decr04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:39:16 BoogieIcfgContainer [2021-08-21 13:39:16,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 13:39:16,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 13:39:16,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 13:39:16,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 13:39:16,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "incr-decr04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:15" (1/2) ... [2021-08-21 13:39:16,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@631224f9 and model type incr-decr04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:39:16, skipping insertion in model container [2021-08-21 13:39:16,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "incr-decr04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:39:16" (2/2) ... [2021-08-21 13:39:16,175 INFO L111 eAbstractionObserver]: Analyzing ICFG incr-decr04.bpl [2021-08-21 13:39:16,179 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 13:39:16,179 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 13:39:16,180 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 13:39:16,180 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 13:39:16,220 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-21 13:39:16,256 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 13:39:16,262 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 13:39:16,262 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-21 13:39:16,271 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 28 transitions, 88 flow [2021-08-21 13:39:16,302 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 163 states, 162 states have (on average 3.765432098765432) internal successors, (610), 162 states have internal predecessors, (610), 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 13:39:16,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 163 states, 162 states have (on average 3.765432098765432) internal successors, (610), 162 states have internal predecessors, (610), 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 13:39:16,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 13:39:16,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:16,321 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:39:16,321 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:39:16,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:16,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1011562807, now seen corresponding path program 1 times [2021-08-21 13:39:16,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:16,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821366898] [2021-08-21 13:39:16,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:16,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:16,509 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 13:39:16,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:16,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821366898] [2021-08-21 13:39:16,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821366898] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:39:16,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:39:16,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-21 13:39:16,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758691025] [2021-08-21 13:39:16,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 13:39:16,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:16,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 13:39:16,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:39:16,538 INFO L87 Difference]: Start difference. First operand has 163 states, 162 states have (on average 3.765432098765432) internal successors, (610), 162 states have internal predecessors, (610), 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, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 13:39:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:16,621 INFO L93 Difference]: Finished difference Result 208 states and 771 transitions. [2021-08-21 13:39:16,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 13:39:16,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 14 [2021-08-21 13:39:16,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:16,684 INFO L225 Difference]: With dead ends: 208 [2021-08-21 13:39:16,684 INFO L226 Difference]: Without dead ends: 203 [2021-08-21 13:39:16,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:39:16,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-08-21 13:39:16,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2021-08-21 13:39:16,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.7475247524752477) internal successors, (757), 202 states have internal predecessors, (757), 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 13:39:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 757 transitions. [2021-08-21 13:39:16,763 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 757 transitions. Word has length 14 [2021-08-21 13:39:16,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:16,764 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 757 transitions. [2021-08-21 13:39:16,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 13:39:16,765 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 757 transitions. [2021-08-21 13:39:16,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 13:39:16,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:16,768 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:39:16,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 13:39:16,772 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:39:16,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:16,776 INFO L82 PathProgramCache]: Analyzing trace with hash -281559433, now seen corresponding path program 1 times [2021-08-21 13:39:16,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:16,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150831596] [2021-08-21 13:39:16,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:16,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:39:16,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:16,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150831596] [2021-08-21 13:39:16,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150831596] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:39:16,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:39:16,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 13:39:16,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109490319] [2021-08-21 13:39:16,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:39:16,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:16,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:39:16,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:39:16,913 INFO L87 Difference]: Start difference. First operand 203 states and 757 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 13:39:16,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:16,988 INFO L93 Difference]: Finished difference Result 311 states and 1164 transitions. [2021-08-21 13:39:16,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:39:16,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 16 [2021-08-21 13:39:16,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:16,996 INFO L225 Difference]: With dead ends: 311 [2021-08-21 13:39:16,997 INFO L226 Difference]: Without dead ends: 274 [2021-08-21 13:39:16,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:39:16,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-08-21 13:39:17,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 245. [2021-08-21 13:39:17,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 3.7991803278688523) internal successors, (927), 244 states have internal predecessors, (927), 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 13:39:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 927 transitions. [2021-08-21 13:39:17,044 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 927 transitions. Word has length 16 [2021-08-21 13:39:17,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:17,045 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 927 transitions. [2021-08-21 13:39:17,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 13:39:17,045 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 927 transitions. [2021-08-21 13:39:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 13:39:17,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:17,052 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 13:39:17,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 13:39:17,052 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:39:17,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:17,053 INFO L82 PathProgramCache]: Analyzing trace with hash -94972553, now seen corresponding path program 1 times [2021-08-21 13:39:17,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:17,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927692322] [2021-08-21 13:39:17,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:17,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:17,184 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 13:39:17,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:17,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927692322] [2021-08-21 13:39:17,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927692322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:39:17,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813511160] [2021-08-21 13:39:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:17,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:39:17,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:39:17,189 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 13:39:17,191 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 13:39:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:17,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 13:39:17,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:39:17,391 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 13:39:17,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813511160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:39:17,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:39:17,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 13:39:17,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318043991] [2021-08-21 13:39:17,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 13:39:17,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:17,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 13:39:17,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:39:17,393 INFO L87 Difference]: Start difference. First operand 245 states and 927 transitions. Second operand has 5 states, 4 states have (on average 4.5) 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 13:39:17,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:17,450 INFO L93 Difference]: Finished difference Result 382 states and 1457 transitions. [2021-08-21 13:39:17,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 13:39:17,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) 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 13:39:17,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:17,454 INFO L225 Difference]: With dead ends: 382 [2021-08-21 13:39:17,454 INFO L226 Difference]: Without dead ends: 272 [2021-08-21 13:39:17,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:39:17,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-08-21 13:39:17,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 227. [2021-08-21 13:39:17,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 3.836283185840708) internal successors, (867), 226 states have internal predecessors, (867), 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 13:39:17,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 867 transitions. [2021-08-21 13:39:17,468 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 867 transitions. Word has length 18 [2021-08-21 13:39:17,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:17,469 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 867 transitions. [2021-08-21 13:39:17,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) 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 13:39:17,469 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 867 transitions. [2021-08-21 13:39:17,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:39:17,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:17,471 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] [2021-08-21 13:39:17,496 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 13:39:17,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:39:17,688 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:39:17,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:17,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1168623019, now seen corresponding path program 1 times [2021-08-21 13:39:17,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:17,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593345555] [2021-08-21 13:39:17,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:17,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:39:17,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:17,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593345555] [2021-08-21 13:39:17,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593345555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:39:17,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940055419] [2021-08-21 13:39:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:17,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:39:17,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:39:17,814 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 13:39:17,832 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 13:39:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:17,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:39:17,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:39:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:39:18,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940055419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:39:18,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:39:18,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 13:39:18,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009585742] [2021-08-21 13:39:18,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 13:39:18,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:18,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 13:39:18,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:39:18,038 INFO L87 Difference]: Start difference. First operand 227 states and 867 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 13:39:18,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:18,133 INFO L93 Difference]: Finished difference Result 347 states and 1329 transitions. [2021-08-21 13:39:18,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 13:39:18,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 20 [2021-08-21 13:39:18,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:18,135 INFO L225 Difference]: With dead ends: 347 [2021-08-21 13:39:18,135 INFO L226 Difference]: Without dead ends: 171 [2021-08-21 13:39:18,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:39:18,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-08-21 13:39:18,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 153. [2021-08-21 13:39:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 3.7960526315789473) internal successors, (577), 152 states have internal predecessors, (577), 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 13:39:18,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 577 transitions. [2021-08-21 13:39:18,143 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 577 transitions. Word has length 20 [2021-08-21 13:39:18,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:18,143 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 577 transitions. [2021-08-21 13:39:18,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 13:39:18,143 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 577 transitions. [2021-08-21 13:39:18,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:39:18,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:18,144 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, 1] [2021-08-21 13:39:18,170 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 13:39:18,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-21 13:39:18,361 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:39:18,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:18,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1281376677, now seen corresponding path program 1 times [2021-08-21 13:39:18,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:18,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261865977] [2021-08-21 13:39:18,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:18,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:39:18,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:18,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261865977] [2021-08-21 13:39:18,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261865977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:39:18,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814216124] [2021-08-21 13:39:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:18,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:39:18,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:39:18,454 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) [2021-08-21 13:39:18,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 13:39:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:18,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:39:18,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:39:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:39:18,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814216124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:39:18,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:39:18,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 13:39:18,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886923236] [2021-08-21 13:39:18,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:39:18,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:18,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:39:18,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:39:18,709 INFO L87 Difference]: Start difference. First operand 153 states and 577 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2021-08-21 13:39:18,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:18,828 INFO L93 Difference]: Finished difference Result 152 states and 576 transitions. [2021-08-21 13:39:18,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:39:18,828 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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 22 [2021-08-21 13:39:18,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:18,829 INFO L225 Difference]: With dead ends: 152 [2021-08-21 13:39:18,829 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 13:39:18,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:39:18,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 13:39:18,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 13:39:18,830 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 13:39:18,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 13:39:18,830 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2021-08-21 13:39:18,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:18,830 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 13:39:18,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2021-08-21 13:39:18,831 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 13:39:18,831 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 13:39:18,833 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 13:39:18,834 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 13:39:18,834 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 13:39:18,834 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 13:39:18,834 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-21 13:39:18,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 13:39:19,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:39:19,060 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 13:39:19,061 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 13:39:19,062 INFO L202 PluginConnector]: Adding new model incr-decr04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:39:19 BasicIcfg [2021-08-21 13:39:19,062 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 13:39:19,063 INFO L168 Benchmark]: Toolchain (without parser) took 3142.00 ms. Allocated memory was 180.4 MB in the beginning and 231.7 MB in the end (delta: 51.4 MB). Free memory was 161.2 MB in the beginning and 157.4 MB in the end (delta: 3.8 MB). Peak memory consumption was 55.7 MB. Max. memory is 8.0 GB. [2021-08-21 13:39:19,064 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 180.4 MB. Free memory is still 162.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 13:39:19,064 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.00 ms. Allocated memory is still 180.4 MB. Free memory was 161.1 MB in the beginning and 159.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:39:19,064 INFO L168 Benchmark]: Boogie Preprocessor took 15.64 ms. Allocated memory is still 180.4 MB. Free memory was 159.6 MB in the beginning and 158.7 MB in the end (delta: 866.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:39:19,065 INFO L168 Benchmark]: RCFGBuilder took 207.74 ms. Allocated memory is still 180.4 MB. Free memory was 158.7 MB in the beginning and 149.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-08-21 13:39:19,066 INFO L168 Benchmark]: TraceAbstraction took 2891.27 ms. Allocated memory was 180.4 MB in the beginning and 231.7 MB in the end (delta: 51.4 MB). Free memory was 149.1 MB in the beginning and 157.4 MB in the end (delta: -8.3 MB). Peak memory consumption was 44.1 MB. Max. memory is 8.0 GB. [2021-08-21 13:39:19,067 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 0.16 ms. Allocated memory is still 180.4 MB. Free memory is still 162.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.00 ms. Allocated memory is still 180.4 MB. Free memory was 161.1 MB in the beginning and 159.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.64 ms. Allocated memory is still 180.4 MB. Free memory was 159.6 MB in the beginning and 158.7 MB in the end (delta: 866.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 207.74 ms. Allocated memory is still 180.4 MB. Free memory was 158.7 MB in the beginning and 149.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2891.27 ms. Allocated memory was 180.4 MB in the beginning and 231.7 MB in the end (delta: 51.4 MB). Free memory was 149.1 MB in the beginning and 157.4 MB in the end (delta: -8.3 MB). Peak memory consumption was 44.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 18]: 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 6 procedures, 32 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 2805.6ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 28.6ms, AutomataDifference: 533.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 40.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 149 SDtfs, 76 SDslu, 348 SDs, 0 SdLazy, 404 SolverSat, 60 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 247.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 129.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=245occurred in iteration=2, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 114.9ms AutomataMinimizationTime, 5 MinimizatonAttempts, 92 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 36.2ms SsaConstructionTime, 79.7ms SatisfiabilityAnalysisTime, 1011.9ms InterpolantComputationTime, 150 NumberOfCodeBlocks, 150 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 142 ConstructedInterpolants, 0 QuantifiedInterpolants, 942 SizeOfPredicates, 0 NumberOfNonLiveVariables, 183 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 3/19 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 13:39:19,101 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...