/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/POPL2022/bluetooth-serverassert03.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 19:02:58,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 19:02:58,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 19:02:58,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 19:02:58,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 19:02:58,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 19:02:58,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 19:02:58,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 19:02:58,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 19:02:58,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 19:02:58,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 19:02:58,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 19:02:58,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 19:02:58,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 19:02:58,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 19:02:58,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 19:02:58,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 19:02:58,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 19:02:58,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 19:02:58,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 19:02:58,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 19:02:58,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 19:02:58,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 19:02:58,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 19:02:58,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-21 19:02:58,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-21 19:02:58,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-21 19:02:58,187 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-21 19:02:58,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-21 19:02:58,188 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-21 19:02:58,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 19:02:58,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 19:02:58,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 19:02:58,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 19:02:58,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 19:02:58,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 19:02:58,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 19:02:58,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 19:02:58,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 19:02:58,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 19:02:58,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 19:02:58,196 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 19:02:58,224 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 19:02:58,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 19:02:58,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 19:02:58,227 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 19:02:58,227 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 19:02:58,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 19:02:58,228 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 19:02:58,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 19:02:58,228 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 19:02:58,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 19:02:58,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 19:02:58,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 19:02:58,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 19:02:58,229 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 19:02:58,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 19:02:58,229 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 19:02:58,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 19:02:58,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 19:02:58,229 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 19:02:58,229 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 19:02:58,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 19:02:58,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 19:02:58,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 19:02:58,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 19:02:58,230 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 19:02:58,230 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 19:02:58,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 19:02:58,230 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 19:02:58,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 19:02:58,231 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 19:02:58,231 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 19:02:58,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 19:02:58,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 19:02:58,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 19:02:58,520 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 19:02:58,533 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 19:02:58,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert03.bpl [2021-08-21 19:02:58,534 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert03.bpl' [2021-08-21 19:02:58,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 19:02:58,560 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 19:02:58,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 19:02:58,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 19:02:58,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 19:02:58,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:02:58" (1/1) ... [2021-08-21 19:02:58,582 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:02:58" (1/1) ... [2021-08-21 19:02:58,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 19:02:58,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 19:02:58,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 19:02:58,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 19:02:58,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:02:58" (1/1) ... [2021-08-21 19:02:58,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:02:58" (1/1) ... [2021-08-21 19:02:58,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:02:58" (1/1) ... [2021-08-21 19:02:58,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:02:58" (1/1) ... [2021-08-21 19:02:58,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:02:58" (1/1) ... [2021-08-21 19:02:58,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:02:58" (1/1) ... [2021-08-21 19:02:58,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:02:58" (1/1) ... [2021-08-21 19:02:58,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 19:02:58,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 19:02:58,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 19:02:58,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 19:02:58,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:02:58" (1/1) ... [2021-08-21 19:02:58,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 19:02:58,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:58,664 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 19:02:58,668 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 19:02:58,700 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-08-21 19:02:58,700 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-08-21 19:02:58,700 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-08-21 19:02:58,700 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-08-21 19:02:58,700 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-08-21 19:02:58,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-08-21 19:02:58,700 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 19:02:58,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 19:02:58,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 19:02:58,701 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 19:02:58,836 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 19:02:58,836 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-21 19:02:58,837 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-08-21 19:02:58,838 INFO L202 PluginConnector]: Adding new model bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:02:58 BoogieIcfgContainer [2021-08-21 19:02:58,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 19:02:58,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 19:02:58,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 19:02:58,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 19:02:58,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:02:58" (1/2) ... [2021-08-21 19:02:58,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@109cc490 and model type bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:02:58, skipping insertion in model container [2021-08-21 19:02:58,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:02:58" (2/2) ... [2021-08-21 19:02:58,842 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth-serverassert03.bpl [2021-08-21 19:02:58,845 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 19:02:58,845 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 19:02:58,846 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 19:02:58,846 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 19:02:58,865 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-21 19:02:58,890 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 19:02:58,894 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 19:02:58,894 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-21 19:02:59,211 INFO L276 IsEmpty]: Start isEmpty. Operand has 433 states, 293 states have (on average 3.8907849829351537) internal successors, (1140), 432 states have internal predecessors, (1140), 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 19:02:59,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 19:02:59,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:59,223 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:59,223 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 19:02:59,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:59,226 INFO L82 PathProgramCache]: Analyzing trace with hash 618014916, now seen corresponding path program 1 times [2021-08-21 19:02:59,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:59,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136640419] [2021-08-21 19:02:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:59,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:59,348 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 19:02:59,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:59,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136640419] [2021-08-21 19:02:59,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136640419] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:02:59,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:02:59,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:02:59,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548040264] [2021-08-21 19:02:59,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 19:02:59,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:59,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 19:02:59,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 19:02:59,369 INFO L87 Difference]: Start difference. First operand has 433 states, 293 states have (on average 3.8907849829351537) internal successors, (1140), 432 states have internal predecessors, (1140), 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 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:59,468 INFO L93 Difference]: Finished difference Result 883 states and 2285 transitions. [2021-08-21 19:02:59,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 19:02:59,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-21 19:02:59,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:59,494 INFO L225 Difference]: With dead ends: 883 [2021-08-21 19:02:59,495 INFO L226 Difference]: Without dead ends: 575 [2021-08-21 19:02:59,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 19:02:59,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-08-21 19:02:59,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 495. [2021-08-21 19:02:59,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 473 states have (on average 3.46723044397463) internal successors, (1640), 494 states have internal predecessors, (1640), 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 19:02:59,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1640 transitions. [2021-08-21 19:02:59,571 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1640 transitions. Word has length 10 [2021-08-21 19:02:59,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:59,571 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1640 transitions. [2021-08-21 19:02:59,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:59,571 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1640 transitions. [2021-08-21 19:02:59,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 19:02:59,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:59,583 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:59,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 19:02:59,583 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 19:02:59,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:59,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1214087216, now seen corresponding path program 1 times [2021-08-21 19:02:59,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:59,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730470694] [2021-08-21 19:02:59,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:59,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:59,602 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 19:02:59,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:59,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730470694] [2021-08-21 19:02:59,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730470694] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:02:59,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:02:59,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 19:02:59,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535115511] [2021-08-21 19:02:59,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 19:02:59,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:59,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 19:02:59,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 19:02:59,606 INFO L87 Difference]: Start difference. First operand 495 states and 1640 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:59,617 INFO L93 Difference]: Finished difference Result 488 states and 1225 transitions. [2021-08-21 19:02:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 19:02:59,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 19:02:59,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:59,620 INFO L225 Difference]: With dead ends: 488 [2021-08-21 19:02:59,620 INFO L226 Difference]: Without dead ends: 429 [2021-08-21 19:02:59,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 19:02:59,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-08-21 19:02:59,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2021-08-21 19:02:59,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 407 states have (on average 2.7076167076167077) internal successors, (1102), 428 states have internal predecessors, (1102), 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 19:02:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1102 transitions. [2021-08-21 19:02:59,633 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1102 transitions. Word has length 12 [2021-08-21 19:02:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:59,634 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1102 transitions. [2021-08-21 19:02:59,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:59,634 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1102 transitions. [2021-08-21 19:02:59,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 19:02:59,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:59,636 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:59,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 19:02:59,636 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 19:02:59,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:59,637 INFO L82 PathProgramCache]: Analyzing trace with hash 579077218, now seen corresponding path program 1 times [2021-08-21 19:02:59,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:59,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975041976] [2021-08-21 19:02:59,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:59,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:59,754 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 19:02:59,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:59,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975041976] [2021-08-21 19:02:59,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975041976] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:02:59,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:02:59,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 19:02:59,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003716523] [2021-08-21 19:02:59,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 19:02:59,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:59,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 19:02:59,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 19:02:59,756 INFO L87 Difference]: Start difference. First operand 429 states and 1102 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 19:02:59,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:59,875 INFO L93 Difference]: Finished difference Result 681 states and 1753 transitions. [2021-08-21 19:02:59,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:02:59,875 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 19:02:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:59,878 INFO L225 Difference]: With dead ends: 681 [2021-08-21 19:02:59,878 INFO L226 Difference]: Without dead ends: 584 [2021-08-21 19:02:59,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 19:02:59,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-08-21 19:02:59,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 478. [2021-08-21 19:02:59,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 457 states have (on average 2.7571115973741795) internal successors, (1260), 477 states have internal predecessors, (1260), 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 19:02:59,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1260 transitions. [2021-08-21 19:02:59,891 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1260 transitions. Word has length 13 [2021-08-21 19:02:59,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:59,897 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1260 transitions. [2021-08-21 19:02:59,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 19:02:59,897 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1260 transitions. [2021-08-21 19:02:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 19:02:59,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:59,898 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:59,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 19:02:59,898 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 19:02:59,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:59,900 INFO L82 PathProgramCache]: Analyzing trace with hash 531465188, now seen corresponding path program 1 times [2021-08-21 19:02:59,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:59,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689828050] [2021-08-21 19:02:59,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:59,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:00,003 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 19:03:00,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:00,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689828050] [2021-08-21 19:03:00,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689828050] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:00,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:00,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:03:00,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655837459] [2021-08-21 19:03:00,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:00,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:00,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:00,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:00,006 INFO L87 Difference]: Start difference. First operand 478 states and 1260 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 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 19:03:00,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:00,080 INFO L93 Difference]: Finished difference Result 692 states and 1793 transitions. [2021-08-21 19:03:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:00,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 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 19:03:00,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:00,083 INFO L225 Difference]: With dead ends: 692 [2021-08-21 19:03:00,083 INFO L226 Difference]: Without dead ends: 564 [2021-08-21 19:03:00,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:00,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-08-21 19:03:00,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 512. [2021-08-21 19:03:00,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 491 states have (on average 2.7678207739307537) internal successors, (1359), 511 states have internal predecessors, (1359), 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 19:03:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1359 transitions. [2021-08-21 19:03:00,094 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1359 transitions. Word has length 16 [2021-08-21 19:03:00,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:00,094 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1359 transitions. [2021-08-21 19:03:00,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 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 19:03:00,094 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1359 transitions. [2021-08-21 19:03:00,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 19:03:00,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:00,096 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:00,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 19:03:00,096 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 19:03:00,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:00,097 INFO L82 PathProgramCache]: Analyzing trace with hash 584859425, now seen corresponding path program 2 times [2021-08-21 19:03:00,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:00,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071332756] [2021-08-21 19:03:00,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:00,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:00,232 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 19:03:00,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:00,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071332756] [2021-08-21 19:03:00,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071332756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:00,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234600308] [2021-08-21 19:03:00,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:03:00,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:00,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:00,249 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 19:03:00,290 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 19:03:00,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:00,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:00,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 19:03:00,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:00,453 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 19:03:00,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234600308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:00,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:00,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 19:03:00,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731837565] [2021-08-21 19:03:00,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 19:03:00,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:00,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 19:03:00,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 19:03:00,455 INFO L87 Difference]: Start difference. First operand 512 states and 1359 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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 19:03:00,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:00,561 INFO L93 Difference]: Finished difference Result 547 states and 1453 transitions. [2021-08-21 19:03:00,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 19:03:00,562 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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 17 [2021-08-21 19:03:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:00,564 INFO L225 Difference]: With dead ends: 547 [2021-08-21 19:03:00,564 INFO L226 Difference]: Without dead ends: 438 [2021-08-21 19:03:00,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 19:03:00,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-08-21 19:03:00,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 368. [2021-08-21 19:03:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 350 states have (on average 2.76) internal successors, (966), 367 states have internal predecessors, (966), 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 19:03:00,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 966 transitions. [2021-08-21 19:03:00,572 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 966 transitions. Word has length 17 [2021-08-21 19:03:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:00,573 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 966 transitions. [2021-08-21 19:03:00,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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 19:03:00,573 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 966 transitions. [2021-08-21 19:03:00,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 19:03:00,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:00,574 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:00,595 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 19:03:00,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:00,812 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 19:03:00,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:00,813 INFO L82 PathProgramCache]: Analyzing trace with hash -997571490, now seen corresponding path program 1 times [2021-08-21 19:03:00,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:00,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901127922] [2021-08-21 19:03:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:00,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:00,964 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 19:03:00,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:00,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901127922] [2021-08-21 19:03:00,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901127922] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:00,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:00,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:03:00,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981714541] [2021-08-21 19:03:00,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:03:00,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:00,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:03:00,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:00,966 INFO L87 Difference]: Start difference. First operand 368 states and 966 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 19:03:01,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:01,049 INFO L93 Difference]: Finished difference Result 368 states and 958 transitions. [2021-08-21 19:03:01,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:03:01,049 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 19 [2021-08-21 19:03:01,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:01,050 INFO L225 Difference]: With dead ends: 368 [2021-08-21 19:03:01,050 INFO L226 Difference]: Without dead ends: 256 [2021-08-21 19:03:01,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:01,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-08-21 19:03:01,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-08-21 19:03:01,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 238 states have (on average 2.668067226890756) internal successors, (635), 255 states have internal predecessors, (635), 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 19:03:01,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 635 transitions. [2021-08-21 19:03:01,055 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 635 transitions. Word has length 19 [2021-08-21 19:03:01,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:01,056 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 635 transitions. [2021-08-21 19:03:01,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 19:03:01,056 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 635 transitions. [2021-08-21 19:03:01,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 19:03:01,057 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:01,057 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:01,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 19:03:01,057 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 19:03:01,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:01,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1129883015, now seen corresponding path program 2 times [2021-08-21 19:03:01,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:01,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503473260] [2021-08-21 19:03:01,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:01,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:01,127 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 19:03:01,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:01,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503473260] [2021-08-21 19:03:01,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503473260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:01,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417393143] [2021-08-21 19:03:01,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:03:01,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:01,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:01,130 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 19:03:01,131 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 19:03:01,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:01,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:01,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 19:03:01,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:01,326 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 19:03:01,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417393143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:01,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:01,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 19:03:01,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465874948] [2021-08-21 19:03:01,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 19:03:01,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:01,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 19:03:01,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 19:03:01,328 INFO L87 Difference]: Start difference. First operand 256 states and 635 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 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 19:03:01,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:01,377 INFO L93 Difference]: Finished difference Result 146 states and 382 transitions. [2021-08-21 19:03:01,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:03:01,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 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 20 [2021-08-21 19:03:01,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:01,378 INFO L225 Difference]: With dead ends: 146 [2021-08-21 19:03:01,378 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 19:03:01,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 19:03:01,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 19:03:01,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 19:03:01,379 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 19:03:01,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 19:03:01,379 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-08-21 19:03:01,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:01,379 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 19:03:01,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 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 19:03:01,379 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 19:03:01,379 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 19:03:01,381 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ServerThreadErr0ASSERT_VIOLATIONASSERT [2021-08-21 19:03:01,381 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 19:03:01,381 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 19:03:01,381 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 19:03:01,381 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-21 19:03:01,382 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ServerThreadErr0ASSERT_VIOLATIONASSERT [2021-08-21 19:03:01,400 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 19:03:01,596 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,SelfDestructingSolverStorable6 [2021-08-21 19:03:01,601 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 19:03:01,601 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 19:03:01,602 INFO L202 PluginConnector]: Adding new model bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:03:01 BasicIcfg [2021-08-21 19:03:01,602 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 19:03:01,603 INFO L168 Benchmark]: Toolchain (without parser) took 3042.30 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 147.3 MB in the beginning and 152.7 MB in the end (delta: -5.4 MB). Peak memory consumption was 29.8 MB. Max. memory is 8.0 GB. [2021-08-21 19:03:01,603 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 166.7 MB. Free memory was 148.4 MB in the beginning and 148.2 MB in the end (delta: 139.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 19:03:01,604 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.50 ms. Allocated memory is still 166.7 MB. Free memory was 147.2 MB in the beginning and 145.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-08-21 19:03:01,604 INFO L168 Benchmark]: Boogie Preprocessor took 15.64 ms. Allocated memory is still 166.7 MB. Free memory was 145.3 MB in the beginning and 144.3 MB in the end (delta: 912.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 19:03:01,604 INFO L168 Benchmark]: RCFGBuilder took 223.09 ms. Allocated memory is still 166.7 MB. Free memory was 144.3 MB in the beginning and 131.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-21 19:03:01,611 INFO L168 Benchmark]: TraceAbstraction took 2762.96 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 130.9 MB in the beginning and 152.7 MB in the end (delta: -21.8 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2021-08-21 19:03:01,612 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 0.14 ms. Allocated memory is still 166.7 MB. Free memory was 148.4 MB in the beginning and 148.2 MB in the end (delta: 139.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 33.50 ms. Allocated memory is still 166.7 MB. Free memory was 147.2 MB in the beginning and 145.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.64 ms. Allocated memory is still 166.7 MB. Free memory was 145.3 MB in the beginning and 144.3 MB in the end (delta: 912.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 223.09 ms. Allocated memory is still 166.7 MB. Free memory was 144.3 MB in the beginning and 131.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2762.96 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 130.9 MB in the beginning and 152.7 MB in the end (delta: -21.8 MB). Peak memory consumption was 12.0 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: 2649, positive: 1872, positive conditional: 1872, positive unconditional: 0, negative: 777, negative conditional: 777, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 2340, positive: 1872, positive conditional: 0, positive unconditional: 1872, negative: 468, negative conditional: 0, negative unconditional: 468, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 157, positive: 128, positive conditional: 0, positive unconditional: 128, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 157, positive: 117, positive conditional: 0, positive unconditional: 117, negative: 40, negative conditional: 0, negative unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 40, positive: 11, positive conditional: 0, positive unconditional: 11, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 128, positive: 62, positive conditional: 0, positive unconditional: 62, negative: 67, negative conditional: 0, negative unconditional: 67, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2340, positive: 1744, positive conditional: 0, positive unconditional: 1744, negative: 439, negative conditional: 0, negative unconditional: 439, unknown: 157, unknown conditional: 0, unknown unconditional: 157] , Statistics on independence cache: Total cache size (in pairs): 157, Positive cache size: 128, Positive conditional cache size: 0, Positive unconditional cache size: 128, Negative cache size: 29, Negative conditional cache size: 0, Negative unconditional cache size: 29, Independence queries for same thread: 309 - 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: 72]: 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, 42 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 2710.1ms, OverallIterations: 7, TraceHistogramMax: 2, EmptinessCheckTime: 33.6ms, AutomataDifference: 604.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 310.8ms, PartialOrderReductionTime: 301.7ms, HoareTripleCheckerStatistics: 177 SDtfs, 222 SDslu, 464 SDs, 0 SdLazy, 568 SolverSat, 128 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 326.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 259.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=512occurred in iteration=4, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 116.5ms AutomataMinimizationTime, 7 MinimizatonAttempts, 308 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 19.7ms SsaConstructionTime, 77.9ms SatisfiabilityAnalysisTime, 844.6ms InterpolantComputationTime, 144 NumberOfCodeBlocks, 144 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 135 ConstructedInterpolants, 0 QuantifiedInterpolants, 670 SizeOfPredicates, 4 NumberOfNonLiveVariables, 78 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 0/4 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 19:03:01,667 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...