/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert03.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-1c3aa5735269c4be989a50fc1da9ea7b9492ef29-1c3aa57 [2021-07-01 09:25:31,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-01 09:25:31,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-01 09:25:31,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-01 09:25:31,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-01 09:25:31,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-01 09:25:31,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-01 09:25:31,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-01 09:25:31,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-01 09:25:31,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-01 09:25:31,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-01 09:25:31,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-01 09:25:31,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-01 09:25:31,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-01 09:25:31,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-01 09:25:31,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-01 09:25:31,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-01 09:25:31,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-01 09:25:31,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-01 09:25:31,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-01 09:25:31,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-01 09:25:31,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-01 09:25:31,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-01 09:25:31,756 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-01 09:25:31,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-01 09:25:31,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-01 09:25:31,758 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-01 09:25:31,759 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-01 09:25:31,759 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-01 09:25:31,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-01 09:25:31,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-01 09:25:31,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-01 09:25:31,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-01 09:25:31,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-01 09:25:31,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-01 09:25:31,762 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-01 09:25:31,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-01 09:25:31,763 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-01 09:25:31,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-01 09:25:31,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-01 09:25:31,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-01 09:25:31,765 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-01 09:25:31,797 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-01 09:25:31,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-01 09:25:31,797 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-01 09:25:31,798 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-01 09:25:31,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-01 09:25:31,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-01 09:25:31,799 INFO L138 SettingsManager]: * Use SBE=true [2021-07-01 09:25:31,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-01 09:25:31,799 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-01 09:25:31,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-01 09:25:31,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-01 09:25:31,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-01 09:25:31,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-01 09:25:31,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-01 09:25:31,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-01 09:25:31,800 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-01 09:25:31,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-01 09:25:31,800 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-01 09:25:31,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-01 09:25:31,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-01 09:25:31,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-01 09:25:31,801 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-01 09:25:31,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-01 09:25:31,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-01 09:25:31,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-01 09:25:31,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-01 09:25:31,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-01 09:25:31,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-01 09:25:31,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-01 09:25:31,802 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-01 09:25:31,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-01 09:25:31,802 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-01 09:25:32,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-01 09:25:32,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-01 09:25:32,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-01 09:25:32,050 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-01 09:25:32,051 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-01 09:25:32,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert03.bpl [2021-07-01 09:25:32,052 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-serverassert03.bpl' [2021-07-01 09:25:32,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-01 09:25:32,068 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-01 09:25:32,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-01 09:25:32,069 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-01 09:25:32,069 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-01 09:25:32,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:32" (1/1) ... [2021-07-01 09:25:32,081 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:32" (1/1) ... [2021-07-01 09:25:32,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-01 09:25:32,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-01 09:25:32,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-01 09:25:32,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-01 09:25:32,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:32" (1/1) ... [2021-07-01 09:25:32,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:32" (1/1) ... [2021-07-01 09:25:32,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:32" (1/1) ... [2021-07-01 09:25:32,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:32" (1/1) ... [2021-07-01 09:25:32,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:32" (1/1) ... [2021-07-01 09:25:32,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:32" (1/1) ... [2021-07-01 09:25:32,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:32" (1/1) ... [2021-07-01 09:25:32,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-01 09:25:32,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-01 09:25:32,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-01 09:25:32,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-01 09:25:32,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-01 09:25:32,229 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-07-01 09:25:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-07-01 09:25:32,230 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-07-01 09:25:32,230 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-07-01 09:25:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-07-01 09:25:32,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-07-01 09:25:32,230 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-01 09:25:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-01 09:25:32,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-01 09:25:32,231 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-01 09:25:32,439 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-01 09:25:32,440 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-07-01 09:25:32,440 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-07-01 09:25:32,441 INFO L202 PluginConnector]: Adding new model bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 09:25:32 BoogieIcfgContainer [2021-07-01 09:25:32,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-01 09:25:32,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-01 09:25:32,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-01 09:25:32,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-01 09:25:32,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 09:25:32" (1/2) ... [2021-07-01 09:25:32,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce3f53e and model type bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 09:25:32, skipping insertion in model container [2021-07-01 09:25:32,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 09:25:32" (2/2) ... [2021-07-01 09:25:32,446 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth-serverassert03.bpl [2021-07-01 09:25:32,450 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-01 09:25:32,450 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-01 09:25:32,450 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-01 09:25:32,451 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-01 09:25:32,509 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-07-01 09:25:32,523 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-01 09:25:32,547 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-01 09:25:32,547 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-01 09:25:32,547 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-01 09:25:32,547 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-01 09:25:32,547 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-01 09:25:32,548 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-01 09:25:32,548 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-01 09:25:32,548 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ServerThreadThread1of1ForFork0======== [2021-07-01 09:25:32,557 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 29 transitions, 78 flow [2021-07-01 09:25:32,629 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 541 states, 406 states have (on average 4.1330049261083746) internal successors, (1678), 406 states have internal predecessors, (1678), 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) [2021-07-01 09:25:32,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 541 states, 406 states have (on average 4.1330049261083746) internal successors, (1678), 406 states have internal predecessors, (1678), 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) [2021-07-01 09:25:32,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-01 09:25:32,640 INFO L496 BasicCegarLoop]: Found error trace [2021-07-01 09:25:32,640 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 09:25:32,641 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ServerThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 09:25:32,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 09:25:32,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1074569651, now seen corresponding path program 1 times [2021-07-01 09:25:32,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 09:25:32,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593609575] [2021-07-01 09:25:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 09:25:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 09:25:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 09:25:32,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 09:25:32,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593609575] [2021-07-01 09:25:32,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593609575] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 09:25:32,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 09:25:32,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-01 09:25:32,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972412585] [2021-07-01 09:25:32,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-01 09:25:32,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 09:25:32,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-01 09:25:32,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-01 09:25:32,775 INFO L87 Difference]: Start difference. First operand has 541 states, 406 states have (on average 4.1330049261083746) internal successors, (1678), 406 states have internal predecessors, (1678), 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) [2021-07-01 09:25:32,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-01 09:25:32,842 INFO L93 Difference]: Finished difference Result 860 states and 3594 transitions. [2021-07-01 09:25:32,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-01 09:25:32,843 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 [2021-07-01 09:25:32,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-01 09:25:32,860 INFO L225 Difference]: With dead ends: 860 [2021-07-01 09:25:32,860 INFO L226 Difference]: Without dead ends: 850 [2021-07-01 09:25:32,861 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-01 09:25:32,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-07-01 09:25:32,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 726. [2021-07-01 09:25:32,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 4.147586206896552) internal successors, (3007), 725 states have internal predecessors, (3007), 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) [2021-07-01 09:25:32,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 3007 transitions. [2021-07-01 09:25:32,922 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 3007 transitions. Word has length 10 [2021-07-01 09:25:32,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-01 09:25:32,922 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 3007 transitions. [2021-07-01 09:25:32,922 INFO L483 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) [2021-07-01 09:25:32,923 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 3007 transitions. [2021-07-01 09:25:32,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-01 09:25:32,925 INFO L496 BasicCegarLoop]: Found error trace [2021-07-01 09:25:32,925 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 09:25:32,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-01 09:25:32,926 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ServerThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 09:25:32,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 09:25:32,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2124684737, now seen corresponding path program 1 times [2021-07-01 09:25:32,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 09:25:32,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51629038] [2021-07-01 09:25:32,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 09:25:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 09:25:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 09:25:32,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 09:25:32,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51629038] [2021-07-01 09:25:32,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51629038] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 09:25:32,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 09:25:32,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-01 09:25:32,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19340191] [2021-07-01 09:25:32,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-01 09:25:32,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 09:25:32,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-01 09:25:32,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-01 09:25:32,942 INFO L87 Difference]: Start difference. First operand 726 states and 3007 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) [2021-07-01 09:25:32,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-01 09:25:32,952 INFO L93 Difference]: Finished difference Result 726 states and 2458 transitions. [2021-07-01 09:25:32,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-01 09:25:32,953 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 [2021-07-01 09:25:32,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-01 09:25:32,956 INFO L225 Difference]: With dead ends: 726 [2021-07-01 09:25:32,956 INFO L226 Difference]: Without dead ends: 642 [2021-07-01 09:25:32,956 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-01 09:25:32,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-07-01 09:25:32,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2021-07-01 09:25:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 3.4726989079563184) internal successors, (2226), 641 states have internal predecessors, (2226), 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) [2021-07-01 09:25:32,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 2226 transitions. [2021-07-01 09:25:32,975 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 2226 transitions. Word has length 12 [2021-07-01 09:25:32,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-01 09:25:32,975 INFO L482 AbstractCegarLoop]: Abstraction has 642 states and 2226 transitions. [2021-07-01 09:25:32,975 INFO L483 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) [2021-07-01 09:25:32,975 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 2226 transitions. [2021-07-01 09:25:32,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-01 09:25:32,977 INFO L496 BasicCegarLoop]: Found error trace [2021-07-01 09:25:32,977 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 09:25:32,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-01 09:25:32,977 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ServerThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 09:25:32,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 09:25:32,978 INFO L82 PathProgramCache]: Analyzing trace with hash -389731919, now seen corresponding path program 1 times [2021-07-01 09:25:32,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 09:25:32,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392797159] [2021-07-01 09:25:32,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 09:25:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 09:25:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 09:25:33,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 09:25:33,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392797159] [2021-07-01 09:25:33,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392797159] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 09:25:33,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 09:25:33,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-01 09:25:33,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702876824] [2021-07-01 09:25:33,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-01 09:25:33,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 09:25:33,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-01 09:25:33,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-01 09:25:33,028 INFO L87 Difference]: Start difference. First operand 642 states and 2226 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) [2021-07-01 09:25:33,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-01 09:25:33,086 INFO L93 Difference]: Finished difference Result 1066 states and 3724 transitions. [2021-07-01 09:25:33,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-01 09:25:33,087 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 [2021-07-01 09:25:33,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-01 09:25:33,091 INFO L225 Difference]: With dead ends: 1066 [2021-07-01 09:25:33,091 INFO L226 Difference]: Without dead ends: 834 [2021-07-01 09:25:33,091 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-01 09:25:33,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-07-01 09:25:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 665. [2021-07-01 09:25:33,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 3.5105421686746987) internal successors, (2331), 664 states have internal predecessors, (2331), 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) [2021-07-01 09:25:33,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 2331 transitions. [2021-07-01 09:25:33,107 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 2331 transitions. Word has length 13 [2021-07-01 09:25:33,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-01 09:25:33,107 INFO L482 AbstractCegarLoop]: Abstraction has 665 states and 2331 transitions. [2021-07-01 09:25:33,107 INFO L483 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) [2021-07-01 09:25:33,108 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 2331 transitions. [2021-07-01 09:25:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-01 09:25:33,109 INFO L496 BasicCegarLoop]: Found error trace [2021-07-01 09:25:33,109 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 09:25:33,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-01 09:25:33,109 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ServerThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 09:25:33,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 09:25:33,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1980326683, now seen corresponding path program 1 times [2021-07-01 09:25:33,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 09:25:33,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004575613] [2021-07-01 09:25:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 09:25:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 09:25:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 09:25:33,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 09:25:33,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004575613] [2021-07-01 09:25:33,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004575613] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 09:25:33,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 09:25:33,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-01 09:25:33,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518849675] [2021-07-01 09:25:33,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-01 09:25:33,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 09:25:33,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-01 09:25:33,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-01 09:25:33,162 INFO L87 Difference]: Start difference. First operand 665 states and 2331 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) [2021-07-01 09:25:33,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-01 09:25:33,245 INFO L93 Difference]: Finished difference Result 977 states and 3393 transitions. [2021-07-01 09:25:33,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-01 09:25:33,245 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 [2021-07-01 09:25:33,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-01 09:25:33,250 INFO L225 Difference]: With dead ends: 977 [2021-07-01 09:25:33,251 INFO L226 Difference]: Without dead ends: 757 [2021-07-01 09:25:33,251 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-01 09:25:33,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-07-01 09:25:33,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 705. [2021-07-01 09:25:33,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.4232954545454546) internal successors, (2410), 704 states have internal predecessors, (2410), 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) [2021-07-01 09:25:33,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2410 transitions. [2021-07-01 09:25:33,268 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2410 transitions. Word has length 16 [2021-07-01 09:25:33,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-01 09:25:33,271 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2410 transitions. [2021-07-01 09:25:33,271 INFO L483 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) [2021-07-01 09:25:33,272 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2410 transitions. [2021-07-01 09:25:33,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-01 09:25:33,273 INFO L496 BasicCegarLoop]: Found error trace [2021-07-01 09:25:33,273 INFO L504 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 09:25:33,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-01 09:25:33,273 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ServerThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 09:25:33,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 09:25:33,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572462, now seen corresponding path program 2 times [2021-07-01 09:25:33,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 09:25:33,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51282002] [2021-07-01 09:25:33,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 09:25:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 09:25:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 09:25:33,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 09:25:33,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51282002] [2021-07-01 09:25:33,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51282002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-01 09:25:33,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713976814] [2021-07-01 09:25:33,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-01 09:25:33,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-01 09:25:33,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-01 09:25:33,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-01 09:25:33,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-01 09:25:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 09:25:33,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713976814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-01 09:25:33,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-01 09:25:33,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-01 09:25:33,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972645146] [2021-07-01 09:25:33,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-01 09:25:33,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 09:25:33,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-01 09:25:33,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-01 09:25:33,559 INFO L87 Difference]: Start difference. First operand 705 states and 2410 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) [2021-07-01 09:25:33,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-01 09:25:33,649 INFO L93 Difference]: Finished difference Result 784 states and 2711 transitions. [2021-07-01 09:25:33,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-01 09:25:33,649 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 [2021-07-01 09:25:33,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-01 09:25:33,652 INFO L225 Difference]: With dead ends: 784 [2021-07-01 09:25:33,652 INFO L226 Difference]: Without dead ends: 612 [2021-07-01 09:25:33,652 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-01 09:25:33,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-07-01 09:25:33,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 512. [2021-07-01 09:25:33,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 3.4990215264187867) internal successors, (1788), 511 states have internal predecessors, (1788), 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) [2021-07-01 09:25:33,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1788 transitions. [2021-07-01 09:25:33,666 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1788 transitions. Word has length 17 [2021-07-01 09:25:33,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-01 09:25:33,666 INFO L482 AbstractCegarLoop]: Abstraction has 512 states and 1788 transitions. [2021-07-01 09:25:33,666 INFO L483 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) [2021-07-01 09:25:33,666 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1788 transitions. [2021-07-01 09:25:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-01 09:25:33,667 INFO L496 BasicCegarLoop]: Found error trace [2021-07-01 09:25:33,667 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 09:25:33,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-01 09:25:33,884 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ServerThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 09:25:33,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 09:25:33,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1354418373, now seen corresponding path program 1 times [2021-07-01 09:25:33,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 09:25:33,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776106554] [2021-07-01 09:25:33,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 09:25:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 09:25:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 09:25:33,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 09:25:33,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776106554] [2021-07-01 09:25:33,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776106554] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 09:25:33,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 09:25:33,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-01 09:25:33,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9448928] [2021-07-01 09:25:33,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-01 09:25:33,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 09:25:33,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-01 09:25:33,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-01 09:25:33,937 INFO L87 Difference]: Start difference. First operand 512 states and 1788 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) [2021-07-01 09:25:34,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-01 09:25:34,015 INFO L93 Difference]: Finished difference Result 512 states and 1772 transitions. [2021-07-01 09:25:34,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-01 09:25:34,016 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 [2021-07-01 09:25:34,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-01 09:25:34,018 INFO L225 Difference]: With dead ends: 512 [2021-07-01 09:25:34,018 INFO L226 Difference]: Without dead ends: 322 [2021-07-01 09:25:34,018 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-01 09:25:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-07-01 09:25:34,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2021-07-01 09:25:34,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.1993769470404985) internal successors, (1027), 321 states have internal predecessors, (1027), 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) [2021-07-01 09:25:34,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1027 transitions. [2021-07-01 09:25:34,025 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1027 transitions. Word has length 19 [2021-07-01 09:25:34,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-01 09:25:34,025 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 1027 transitions. [2021-07-01 09:25:34,026 INFO L483 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) [2021-07-01 09:25:34,026 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1027 transitions. [2021-07-01 09:25:34,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-01 09:25:34,026 INFO L496 BasicCegarLoop]: Found error trace [2021-07-01 09:25:34,026 INFO L504 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 09:25:34,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-01 09:25:34,027 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ServerThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 09:25:34,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 09:25:34,027 INFO L82 PathProgramCache]: Analyzing trace with hash 732715964, now seen corresponding path program 2 times [2021-07-01 09:25:34,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 09:25:34,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661852735] [2021-07-01 09:25:34,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 09:25:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 09:25:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 09:25:34,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 09:25:34,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661852735] [2021-07-01 09:25:34,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661852735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-01 09:25:34,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608929700] [2021-07-01 09:25:34,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-01 09:25:34,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-01 09:25:34,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-01 09:25:34,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-01 09:25:34,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-01 09:25:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 09:25:34,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608929700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-01 09:25:34,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-01 09:25:34,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-01 09:25:34,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025281724] [2021-07-01 09:25:34,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-01 09:25:34,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 09:25:34,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-01 09:25:34,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-01 09:25:34,202 INFO L87 Difference]: Start difference. First operand 322 states and 1027 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) [2021-07-01 09:25:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-01 09:25:34,246 INFO L93 Difference]: Finished difference Result 192 states and 620 transitions. [2021-07-01 09:25:34,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-01 09:25:34,246 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 [2021-07-01 09:25:34,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-01 09:25:34,247 INFO L225 Difference]: With dead ends: 192 [2021-07-01 09:25:34,247 INFO L226 Difference]: Without dead ends: 0 [2021-07-01 09:25:34,247 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-01 09:25:34,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-01 09:25:34,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-01 09:25:34,247 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) [2021-07-01 09:25:34,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-01 09:25:34,247 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-07-01 09:25:34,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-01 09:25:34,247 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-01 09:25:34,248 INFO L483 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) [2021-07-01 09:25:34,248 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-01 09:25:34,248 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-01 09:25:34,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-01 09:25:34,466 INFO L301 ceAbstractionStarter]: Result for error location ServerThreadThread1of1ForFork0 was SAFE (1/2) [2021-07-01 09:25:34,468 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-01 09:25:34,468 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-01 09:25:34,468 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-01 09:25:34,468 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-01 09:25:34,468 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-01 09:25:34,469 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-01 09:25:34,469 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-01 09:25:34,469 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-01 09:25:34,469 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-01 09:25:34,469 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 29 transitions, 78 flow [2021-07-01 09:25:34,482 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 541 states, 107 states have (on average 2.7663551401869158) internal successors, (296), 108 states have internal predecessors, (296), 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) [2021-07-01 09:25:34,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 541 states, 107 states have (on average 2.7663551401869158) internal successors, (296), 108 states have internal predecessors, (296), 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) [2021-07-01 09:25:34,483 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-01 09:25:34,483 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (2/2) [2021-07-01 09:25:34,483 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-01 09:25:34,485 INFO L202 PluginConnector]: Adding new model bluetooth-serverassert03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.07 09:25:34 BasicIcfg [2021-07-01 09:25:34,485 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-01 09:25:34,486 INFO L168 Benchmark]: Toolchain (without parser) took 2417.60 ms. Allocated memory was 184.5 MB in the beginning and 284.2 MB in the end (delta: 99.6 MB). Free memory was 165.7 MB in the beginning and 137.5 MB in the end (delta: 28.2 MB). Peak memory consumption was 128.9 MB. Max. memory is 8.0 GB. [2021-07-01 09:25:34,486 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 184.5 MB. Free memory is still 166.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-01 09:25:34,486 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.13 ms. Allocated memory is still 184.5 MB. Free memory was 165.6 MB in the beginning and 163.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-01 09:25:34,486 INFO L168 Benchmark]: Boogie Preprocessor took 9.88 ms. Allocated memory is still 184.5 MB. Free memory was 163.8 MB in the beginning and 163.0 MB in the end (delta: 844.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-01 09:25:34,486 INFO L168 Benchmark]: RCFGBuilder took 339.60 ms. Allocated memory is still 184.5 MB. Free memory was 162.9 MB in the beginning and 150.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-01 09:25:34,486 INFO L168 Benchmark]: TraceAbstraction took 2042.55 ms. Allocated memory was 184.5 MB in the beginning and 284.2 MB in the end (delta: 99.6 MB). Free memory was 149.7 MB in the beginning and 137.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 113.2 MB. Max. memory is 8.0 GB. [2021-07-01 09:25:34,487 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 184.5 MB. Free memory is still 166.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.13 ms. Allocated memory is still 184.5 MB. Free memory was 165.6 MB in the beginning and 163.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 9.88 ms. Allocated memory is still 184.5 MB. Free memory was 163.8 MB in the beginning and 163.0 MB in the end (delta: 844.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 339.60 ms. Allocated memory is still 184.5 MB. Free memory was 162.9 MB in the beginning and 150.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2042.55 ms. Allocated memory was 184.5 MB in the beginning and 284.2 MB in the end (delta: 99.6 MB). Free memory was 149.7 MB in the beginning and 137.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 113.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 72]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ServerThreadThread1of1ForFork0 with 1 thread instances CFG has 7 procedures, 42 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1921.0ms, OverallIterations: 7, TraceHistogramMax: 2, EmptinessCheckTime: 18.0ms, AutomataDifference: 484.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 81.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 213 SDtfs, 268 SDslu, 513 SDs, 0 SdLazy, 527 SolverSat, 127 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 246.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 184.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=726occurred in iteration=1, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 124.7ms AutomataMinimizationTime, 7 MinimizatonAttempts, 445 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 14.1ms SsaConstructionTime, 50.9ms SatisfiabilityAnalysisTime, 523.6ms InterpolantComputationTime, 144 NumberOfCodeBlocks, 144 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 135 ConstructedInterpolants, 0 QuantifiedInterpolants, 666 SizeOfPredicates, 4 NumberOfNonLiveVariables, 78 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 0/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.7ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.5ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=541occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: 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! Received shutdown request...