/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-serverassert04.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 19:03:00,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 19:03:00,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 19:03:00,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 19:03:00,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 19:03:00,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 19:03:00,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 19:03:00,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 19:03:00,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 19:03:00,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 19:03:00,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 19:03:00,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 19:03:00,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 19:03:00,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 19:03:00,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 19:03:00,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 19:03:00,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 19:03:00,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 19:03:00,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 19:03:00,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 19:03:00,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 19:03:00,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 19:03:00,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 19:03:00,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 19:03:00,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 19:03:00,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 19:03:00,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 19:03:00,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 19:03:00,266 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 19:03:00,304 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 19:03:00,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 19:03:00,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 19:03:00,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 19:03:00,308 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 19:03:00,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 19:03:00,309 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 19:03:00,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 19:03:00,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 19:03:00,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 19:03:00,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 19:03:00,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 19:03:00,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 19:03:00,311 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 19:03:00,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 19:03:00,311 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 19:03:00,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 19:03:00,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 19:03:00,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 19:03:00,312 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 19:03:00,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 19:03:00,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 19:03:00,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 19:03:00,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 19:03:00,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 19:03:00,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 19:03:00,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 19:03:00,314 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 19:03:00,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 19:03:00,314 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 19:03:00,314 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 19:03:00,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 19:03:00,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 19:03:00,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 19:03:00,654 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 19:03:00,654 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 19:03:00,655 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert04.bpl [2021-08-21 19:03:00,656 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert04.bpl' [2021-08-21 19:03:00,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 19:03:00,682 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 19:03:00,683 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 19:03:00,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 19:03:00,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 19:03:00,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth-serverassert04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:00" (1/1) ... [2021-08-21 19:03:00,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth-serverassert04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:00" (1/1) ... [2021-08-21 19:03:00,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 19:03:00,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 19:03:00,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 19:03:00,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 19:03:00,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth-serverassert04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:00" (1/1) ... [2021-08-21 19:03:00,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth-serverassert04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:00" (1/1) ... [2021-08-21 19:03:00,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth-serverassert04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:00" (1/1) ... [2021-08-21 19:03:00,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth-serverassert04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:00" (1/1) ... [2021-08-21 19:03:00,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth-serverassert04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:00" (1/1) ... [2021-08-21 19:03:00,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth-serverassert04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:00" (1/1) ... [2021-08-21 19:03:00,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth-serverassert04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:00" (1/1) ... [2021-08-21 19:03:00,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 19:03:00,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 19:03:00,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 19:03:00,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 19:03:00,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth-serverassert04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:00" (1/1) ... [2021-08-21 19:03:00,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 19:03:00,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:00,768 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 19:03:00,791 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 19:03:00,817 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-08-21 19:03:00,817 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-08-21 19:03:00,817 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-08-21 19:03:00,818 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-08-21 19:03:00,818 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-08-21 19:03:00,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-08-21 19:03:00,818 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 19:03:00,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 19:03:00,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 19:03:00,819 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 19:03:01,028 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 19:03:01,028 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-21 19:03:01,029 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-08-21 19:03:01,030 INFO L202 PluginConnector]: Adding new model bluetooth-serverassert04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:03:01 BoogieIcfgContainer [2021-08-21 19:03:01,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 19:03:01,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 19:03:01,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 19:03:01,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 19:03:01,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-serverassert04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:03:00" (1/2) ... [2021-08-21 19:03:01,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351f4b07 and model type bluetooth-serverassert04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:03:01, skipping insertion in model container [2021-08-21 19:03:01,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-serverassert04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:03:01" (2/2) ... [2021-08-21 19:03:01,036 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth-serverassert04.bpl [2021-08-21 19:03:01,040 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 19:03:01,041 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 19:03:01,041 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 19:03:01,041 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 19:03:01,074 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-21 19:03:01,140 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 19:03:01,145 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 19:03:01,146 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-21 19:03:01,790 INFO L276 IsEmpty]: Start isEmpty. Operand has 1297 states, 869 states have (on average 4.902186421173763) internal successors, (4260), 1296 states have internal predecessors, (4260), 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 19:03:01,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 19:03:01,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:01,810 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:01,810 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:03:01,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:01,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1160128791, now seen corresponding path program 1 times [2021-08-21 19:03:01,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:01,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092701997] [2021-08-21 19:03:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:01,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:01,951 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 19:03:01,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:01,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092701997] [2021-08-21 19:03:01,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092701997] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:01,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:01,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:03:01,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484343564] [2021-08-21 19:03:01,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 19:03:01,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:01,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 19:03:01,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 19:03:01,973 INFO L87 Difference]: Start difference. First operand has 1297 states, 869 states have (on average 4.902186421173763) internal successors, (4260), 1296 states have internal predecessors, (4260), 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 19:03:02,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:02,116 INFO L93 Difference]: Finished difference Result 2708 states and 8825 transitions. [2021-08-21 19:03:02,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 19:03:02,117 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 19:03:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:02,147 INFO L225 Difference]: With dead ends: 2708 [2021-08-21 19:03:02,148 INFO L226 Difference]: Without dead ends: 1767 [2021-08-21 19:03:02,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 19:03:02,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-08-21 19:03:02,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1509. [2021-08-21 19:03:02,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1442 states have (on average 4.4674063800277395) internal successors, (6442), 1508 states have internal predecessors, (6442), 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 19:03:02,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 6442 transitions. [2021-08-21 19:03:02,325 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 6442 transitions. Word has length 10 [2021-08-21 19:03:02,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:02,325 INFO L470 AbstractCegarLoop]: Abstraction has 1509 states and 6442 transitions. [2021-08-21 19:03:02,326 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 19:03:02,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 6442 transitions. [2021-08-21 19:03:02,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 19:03:02,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:02,328 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:02,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 19:03:02,329 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:03:02,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:02,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1807737077, now seen corresponding path program 1 times [2021-08-21 19:03:02,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:02,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930162500] [2021-08-21 19:03:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:02,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:02,348 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 19:03:02,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:02,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930162500] [2021-08-21 19:03:02,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930162500] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:02,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:02,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 19:03:02,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843256999] [2021-08-21 19:03:02,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 19:03:02,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:02,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 19:03:02,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 19:03:02,352 INFO L87 Difference]: Start difference. First operand 1509 states and 6442 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 19:03:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:02,375 INFO L93 Difference]: Finished difference Result 1495 states and 4798 transitions. [2021-08-21 19:03:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 19:03:02,376 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 19:03:02,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:02,384 INFO L225 Difference]: With dead ends: 1495 [2021-08-21 19:03:02,385 INFO L226 Difference]: Without dead ends: 1376 [2021-08-21 19:03:02,385 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 19:03:02,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2021-08-21 19:03:02,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1376. [2021-08-21 19:03:02,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1309 states have (on average 3.4293353705118412) internal successors, (4489), 1375 states have internal predecessors, (4489), 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 19:03:02,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 4489 transitions. [2021-08-21 19:03:02,426 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 4489 transitions. Word has length 12 [2021-08-21 19:03:02,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:02,426 INFO L470 AbstractCegarLoop]: Abstraction has 1376 states and 4489 transitions. [2021-08-21 19:03:02,426 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 19:03:02,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 4489 transitions. [2021-08-21 19:03:02,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 19:03:02,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:02,429 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:02,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 19:03:02,429 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:03:02,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:02,430 INFO L82 PathProgramCache]: Analyzing trace with hash 2026626020, now seen corresponding path program 1 times [2021-08-21 19:03:02,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:02,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033368069] [2021-08-21 19:03:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:02,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:02,481 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 19:03:02,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:02,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033368069] [2021-08-21 19:03:02,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033368069] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:02,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:02,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:03:02,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814395109] [2021-08-21 19:03:02,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:02,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:02,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:02,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:02,483 INFO L87 Difference]: Start difference. First operand 1376 states and 4489 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 19:03:02,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:02,545 INFO L93 Difference]: Finished difference Result 1715 states and 5749 transitions. [2021-08-21 19:03:02,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 19:03:02,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 19:03:02,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:02,570 INFO L225 Difference]: With dead ends: 1715 [2021-08-21 19:03:02,570 INFO L226 Difference]: Without dead ends: 1715 [2021-08-21 19:03:02,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:02,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-08-21 19:03:02,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1263. [2021-08-21 19:03:02,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1196 states have (on average 3.5434782608695654) internal successors, (4238), 1262 states have internal predecessors, (4238), 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 19:03:02,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 4238 transitions. [2021-08-21 19:03:02,615 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 4238 transitions. Word has length 13 [2021-08-21 19:03:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:02,615 INFO L470 AbstractCegarLoop]: Abstraction has 1263 states and 4238 transitions. [2021-08-21 19:03:02,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 19:03:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 4238 transitions. [2021-08-21 19:03:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 19:03:02,617 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:02,617 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:02,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 19:03:02,617 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:03:02,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:02,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2026535810, now seen corresponding path program 2 times [2021-08-21 19:03:02,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:02,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906983845] [2021-08-21 19:03:02,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:02,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:02,687 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 19:03:02,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:02,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906983845] [2021-08-21 19:03:02,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906983845] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:02,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:02,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 19:03:02,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029839412] [2021-08-21 19:03:02,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 19:03:02,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:02,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 19:03:02,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 19:03:02,690 INFO L87 Difference]: Start difference. First operand 1263 states and 4238 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 19:03:02,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:02,810 INFO L93 Difference]: Finished difference Result 1959 states and 6465 transitions. [2021-08-21 19:03:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:03:02,811 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 19:03:02,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:02,822 INFO L225 Difference]: With dead ends: 1959 [2021-08-21 19:03:02,822 INFO L226 Difference]: Without dead ends: 1806 [2021-08-21 19:03:02,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 19:03:02,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-08-21 19:03:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1616. [2021-08-21 19:03:02,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1550 states have (on average 3.490967741935484) internal successors, (5411), 1615 states have internal predecessors, (5411), 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 19:03:02,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 5411 transitions. [2021-08-21 19:03:02,884 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 5411 transitions. Word has length 13 [2021-08-21 19:03:02,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:02,884 INFO L470 AbstractCegarLoop]: Abstraction has 1616 states and 5411 transitions. [2021-08-21 19:03:02,884 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 19:03:02,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 5411 transitions. [2021-08-21 19:03:02,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 19:03:02,886 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:02,886 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:02,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 19:03:02,887 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:03:02,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:02,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1207746205, now seen corresponding path program 1 times [2021-08-21 19:03:02,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:02,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092780727] [2021-08-21 19:03:02,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:02,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:03,013 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 19:03:03,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:03,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092780727] [2021-08-21 19:03:03,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092780727] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:03,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:03,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:03:03,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734418615] [2021-08-21 19:03:03,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:03,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:03,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:03,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:03,018 INFO L87 Difference]: Start difference. First operand 1616 states and 5411 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 19:03:03,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:03,123 INFO L93 Difference]: Finished difference Result 2311 states and 7502 transitions. [2021-08-21 19:03:03,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:03,124 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 19:03:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:03,137 INFO L225 Difference]: With dead ends: 2311 [2021-08-21 19:03:03,138 INFO L226 Difference]: Without dead ends: 1957 [2021-08-21 19:03:03,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:03,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-08-21 19:03:03,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1787. [2021-08-21 19:03:03,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1721 states have (on average 3.507844276583382) internal successors, (6037), 1786 states have internal predecessors, (6037), 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 19:03:03,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 6037 transitions. [2021-08-21 19:03:03,228 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 6037 transitions. Word has length 16 [2021-08-21 19:03:03,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:03,228 INFO L470 AbstractCegarLoop]: Abstraction has 1787 states and 6037 transitions. [2021-08-21 19:03:03,228 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 19:03:03,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 6037 transitions. [2021-08-21 19:03:03,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 19:03:03,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:03,231 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:03,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 19:03:03,232 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:03:03,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:03,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1960083329, now seen corresponding path program 2 times [2021-08-21 19:03:03,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:03,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14978268] [2021-08-21 19:03:03,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:03,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:03,351 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 19:03:03,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:03,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14978268] [2021-08-21 19:03:03,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14978268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:03,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583526640] [2021-08-21 19:03:03,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:03:03,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:03,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:03,361 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 19:03:03,407 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 19:03:03,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:03,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:03,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 19:03:03,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:03,656 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 19:03:03,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583526640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:03,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:03,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 19:03:03,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729016153] [2021-08-21 19:03:03,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 19:03:03,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:03,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 19:03:03,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 19:03:03,659 INFO L87 Difference]: Start difference. First operand 1787 states and 6037 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 19:03:03,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:03,817 INFO L93 Difference]: Finished difference Result 2218 states and 7591 transitions. [2021-08-21 19:03:03,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 19:03:03,817 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 19:03:03,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:03,829 INFO L225 Difference]: With dead ends: 2218 [2021-08-21 19:03:03,830 INFO L226 Difference]: Without dead ends: 1940 [2021-08-21 19:03:03,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 19:03:03,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-08-21 19:03:03,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1518. [2021-08-21 19:03:03,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1455 states have (on average 3.5278350515463917) internal successors, (5133), 1517 states have internal predecessors, (5133), 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 19:03:03,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5133 transitions. [2021-08-21 19:03:03,880 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5133 transitions. Word has length 17 [2021-08-21 19:03:03,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:03,880 INFO L470 AbstractCegarLoop]: Abstraction has 1518 states and 5133 transitions. [2021-08-21 19:03:03,880 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 19:03:03,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5133 transitions. [2021-08-21 19:03:03,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 19:03:03,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:03,884 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 19:03:03,913 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 19:03:04,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-21 19:03:04,107 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:03:04,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:04,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2010971682, now seen corresponding path program 1 times [2021-08-21 19:03:04,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:04,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877459245] [2021-08-21 19:03:04,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:04,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:04,238 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 19:03:04,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:04,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877459245] [2021-08-21 19:03:04,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877459245] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:04,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:04,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:03:04,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592437942] [2021-08-21 19:03:04,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:03:04,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:04,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:03:04,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:04,240 INFO L87 Difference]: Start difference. First operand 1518 states and 5133 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 19:03:04,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:04,383 INFO L93 Difference]: Finished difference Result 2192 states and 7320 transitions. [2021-08-21 19:03:04,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:03:04,383 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 19:03:04,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:04,394 INFO L225 Difference]: With dead ends: 2192 [2021-08-21 19:03:04,394 INFO L226 Difference]: Without dead ends: 1828 [2021-08-21 19:03:04,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:04,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-08-21 19:03:04,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1668. [2021-08-21 19:03:04,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1605 states have (on average 3.5894080996884736) internal successors, (5761), 1667 states have internal predecessors, (5761), 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 19:03:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 5761 transitions. [2021-08-21 19:03:04,457 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 5761 transitions. Word has length 19 [2021-08-21 19:03:04,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:04,458 INFO L470 AbstractCegarLoop]: Abstraction has 1668 states and 5761 transitions. [2021-08-21 19:03:04,459 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 19:03:04,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 5761 transitions. [2021-08-21 19:03:04,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 19:03:04,462 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:04,462 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 19:03:04,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 19:03:04,462 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:03:04,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:04,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1527590530, now seen corresponding path program 2 times [2021-08-21 19:03:04,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:04,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987456492] [2021-08-21 19:03:04,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:04,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:04,567 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 19:03:04,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:04,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987456492] [2021-08-21 19:03:04,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987456492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:04,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179688855] [2021-08-21 19:03:04,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:03:04,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:04,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:04,577 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 19:03:04,582 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 19:03:04,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:04,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:04,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 19:03:04,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:04,849 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 19:03:04,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179688855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:04,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:04,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 19:03:04,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581249513] [2021-08-21 19:03:04,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 19:03:04,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:04,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 19:03:04,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 19:03:04,851 INFO L87 Difference]: Start difference. First operand 1668 states and 5761 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 19:03:05,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:05,036 INFO L93 Difference]: Finished difference Result 1733 states and 5997 transitions. [2021-08-21 19:03:05,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:03:05,037 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 19:03:05,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:05,046 INFO L225 Difference]: With dead ends: 1733 [2021-08-21 19:03:05,046 INFO L226 Difference]: Without dead ends: 1328 [2021-08-21 19:03:05,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 19:03:05,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2021-08-21 19:03:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1092. [2021-08-21 19:03:05,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1038 states have (on average 3.5346820809248554) internal successors, (3669), 1091 states have internal predecessors, (3669), 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 19:03:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 3669 transitions. [2021-08-21 19:03:05,081 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 3669 transitions. Word has length 20 [2021-08-21 19:03:05,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:05,081 INFO L470 AbstractCegarLoop]: Abstraction has 1092 states and 3669 transitions. [2021-08-21 19:03:05,081 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 19:03:05,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 3669 transitions. [2021-08-21 19:03:05,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 19:03:05,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:05,084 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 19:03:05,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-21 19:03:05,296 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,SelfDestructingSolverStorable7 [2021-08-21 19:03:05,297 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:03:05,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:05,297 INFO L82 PathProgramCache]: Analyzing trace with hash -911965317, now seen corresponding path program 1 times [2021-08-21 19:03:05,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:05,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066321884] [2021-08-21 19:03:05,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:05,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:05,428 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 19:03:05,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:05,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066321884] [2021-08-21 19:03:05,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066321884] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:05,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:05,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 19:03:05,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230672882] [2021-08-21 19:03:05,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 19:03:05,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:05,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 19:03:05,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 19:03:05,435 INFO L87 Difference]: Start difference. First operand 1092 states and 3669 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 19:03:05,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:05,621 INFO L93 Difference]: Finished difference Result 1092 states and 3653 transitions. [2021-08-21 19:03:05,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 19:03:05,622 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 19:03:05,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:05,625 INFO L225 Difference]: With dead ends: 1092 [2021-08-21 19:03:05,625 INFO L226 Difference]: Without dead ends: 780 [2021-08-21 19:03:05,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 19:03:05,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-08-21 19:03:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 780. [2021-08-21 19:03:05,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 726 states have (on average 3.517906336088154) internal successors, (2554), 779 states have internal predecessors, (2554), 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 19:03:05,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2554 transitions. [2021-08-21 19:03:05,648 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2554 transitions. Word has length 22 [2021-08-21 19:03:05,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:05,648 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2554 transitions. [2021-08-21 19:03:05,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 19:03:05,649 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2554 transitions. [2021-08-21 19:03:05,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 19:03:05,650 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:05,651 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:05,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 19:03:05,651 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ServerThreadErr0ASSERT_VIOLATIONASSERT === [ServerThreadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:03:05,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:05,651 INFO L82 PathProgramCache]: Analyzing trace with hash -561545018, now seen corresponding path program 2 times [2021-08-21 19:03:05,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:05,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073771115] [2021-08-21 19:03:05,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:05,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:05,762 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 19:03:05,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:05,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073771115] [2021-08-21 19:03:05,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073771115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:05,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929107810] [2021-08-21 19:03:05,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:03:05,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:05,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:05,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:05,800 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 19:03:05,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:05,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:05,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 19:03:05,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:06,054 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 19:03:06,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929107810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:06,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:06,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 19:03:06,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621946568] [2021-08-21 19:03:06,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 19:03:06,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:06,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 19:03:06,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-08-21 19:03:06,056 INFO L87 Difference]: Start difference. First operand 780 states and 2554 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 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 19:03:06,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:06,161 INFO L93 Difference]: Finished difference Result 434 states and 1541 transitions. [2021-08-21 19:03:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 19:03:06,162 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 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 23 [2021-08-21 19:03:06,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:06,162 INFO L225 Difference]: With dead ends: 434 [2021-08-21 19:03:06,163 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 19:03:06,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-08-21 19:03:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 19:03:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 19:03:06,163 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 19:03:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 19:03:06,164 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-08-21 19:03:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:06,164 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 19:03:06,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 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 19:03:06,165 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 19:03:06,165 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 19:03:06,167 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ServerThreadErr0ASSERT_VIOLATIONASSERT [2021-08-21 19:03:06,167 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 19:03:06,167 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 19:03:06,167 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 19:03:06,167 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-21 19:03:06,167 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4INUSE_VIOLATION [2021-08-21 19:03:06,167 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ServerThreadErr0ASSERT_VIOLATIONASSERT [2021-08-21 19:03:06,194 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 19:03:06,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:06,389 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 19:03:06,390 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 19:03:06,391 INFO L202 PluginConnector]: Adding new model bluetooth-serverassert04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:03:06 BasicIcfg [2021-08-21 19:03:06,391 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 19:03:06,393 INFO L168 Benchmark]: Toolchain (without parser) took 5710.81 ms. Allocated memory was 179.3 MB in the beginning and 303.0 MB in the end (delta: 123.7 MB). Free memory was 158.9 MB in the beginning and 205.9 MB in the end (delta: -47.0 MB). Peak memory consumption was 78.3 MB. Max. memory is 8.0 GB. [2021-08-21 19:03:06,393 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 179.3 MB. Free memory is still 160.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 19:03:06,393 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.22 ms. Allocated memory is still 179.3 MB. Free memory was 158.7 MB in the beginning and 157.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 19:03:06,393 INFO L168 Benchmark]: Boogie Preprocessor took 17.98 ms. Allocated memory is still 179.3 MB. Free memory was 157.1 MB in the beginning and 156.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 19:03:06,393 INFO L168 Benchmark]: RCFGBuilder took 291.35 ms. Allocated memory is still 179.3 MB. Free memory was 156.0 MB in the beginning and 142.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 19:03:06,394 INFO L168 Benchmark]: TraceAbstraction took 5359.54 ms. Allocated memory was 179.3 MB in the beginning and 303.0 MB in the end (delta: 123.7 MB). Free memory was 141.9 MB in the beginning and 205.9 MB in the end (delta: -64.0 MB). Peak memory consumption was 60.5 MB. Max. memory is 8.0 GB. [2021-08-21 19:03:06,395 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 0.17 ms. Allocated memory is still 179.3 MB. Free memory is still 160.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.22 ms. Allocated memory is still 179.3 MB. Free memory was 158.7 MB in the beginning and 157.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.98 ms. Allocated memory is still 179.3 MB. Free memory was 157.1 MB in the beginning and 156.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 291.35 ms. Allocated memory is still 179.3 MB. Free memory was 156.0 MB in the beginning and 142.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5359.54 ms. Allocated memory was 179.3 MB in the beginning and 303.0 MB in the end (delta: 123.7 MB). Free memory was 141.9 MB in the beginning and 205.9 MB in the end (delta: -64.0 MB). Peak memory consumption was 60.5 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: 12142, positive: 8714, positive conditional: 8714, positive unconditional: 0, negative: 3428, negative conditional: 3428, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 10927, positive: 8714, positive conditional: 0, positive unconditional: 8714, negative: 2213, negative conditional: 0, negative unconditional: 2213, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 251, positive: 201, positive conditional: 0, positive unconditional: 201, negative: 50, negative conditional: 0, negative unconditional: 50, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 251, positive: 180, positive conditional: 0, positive unconditional: 180, negative: 71, negative conditional: 0, negative unconditional: 71, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 71, positive: 21, positive conditional: 0, positive unconditional: 21, negative: 50, negative conditional: 0, negative unconditional: 50, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 290, positive: 117, positive conditional: 0, positive unconditional: 117, negative: 173, negative conditional: 0, negative unconditional: 173, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 10927, positive: 8513, positive conditional: 0, positive unconditional: 8513, negative: 2163, negative conditional: 0, negative unconditional: 2163, unknown: 251, unknown conditional: 0, unknown unconditional: 251] , Statistics on independence cache: Total cache size (in pairs): 251, Positive cache size: 201, Positive conditional cache size: 0, Positive unconditional cache size: 201, Negative cache size: 50, Negative conditional cache size: 0, Negative unconditional cache size: 50, Independence queries for same thread: 1215 - 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: 73]: 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 8 procedures, 47 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 5249.3ms, OverallIterations: 10, TraceHistogramMax: 2, EmptinessCheckTime: 48.9ms, AutomataDifference: 1397.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 635.4ms, PartialOrderReductionTime: 621.5ms, HoareTripleCheckerStatistics: 312 SDtfs, 428 SDslu, 899 SDs, 0 SdLazy, 1178 SolverSat, 282 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 721.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 131 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 383.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1787occurred in iteration=5, InterpolantAutomatonStates: 66, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 567.2ms AutomataMinimizationTime, 10 MinimizatonAttempts, 1888 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 26.1ms SsaConstructionTime, 104.8ms SatisfiabilityAnalysisTime, 1461.6ms InterpolantComputationTime, 225 NumberOfCodeBlocks, 225 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 212 ConstructedInterpolants, 0 QuantifiedInterpolants, 1081 SizeOfPredicates, 6 NumberOfNonLiveVariables, 129 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 0/6 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 19:03:06,426 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...