/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-correct04.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:51:32,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:51:32,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:51:32,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:51:32,662 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 [2021-07-13 20:51:32,696 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:51:32,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:51:32,697 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:51:32,697 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:51:32,699 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:51:32,699 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:51:32,699 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:51:32,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:51:32,699 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:51:32,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:51:32,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:51:32,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:51:32,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:51:32,700 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:51:32,700 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:51:32,700 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:51:32,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:51:32,700 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:51:32,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:51:32,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:51:32,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:51:32,701 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:51:32,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:51:32,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:51:32,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:51:32,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:51:32,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:51:32,701 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:51:32,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:51:32,702 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:51:32,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:51:32,702 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:51:32,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:51:32,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:51:32,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:51:32,940 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:51:32,941 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:51:32,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-correct04.bpl [2021-07-13 20:51:32,942 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-correct04.bpl' [2021-07-13 20:51:32,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:51:32,968 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:51:32,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:51:32,973 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:51:32,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:51:32,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth-correct04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:32" (1/1) ... [2021-07-13 20:51:32,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth-correct04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:32" (1/1) ... [2021-07-13 20:51:32,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:51:32,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:51:32,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:51:32,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:51:33,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth-correct04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:32" (1/1) ... [2021-07-13 20:51:33,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth-correct04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:32" (1/1) ... [2021-07-13 20:51:33,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth-correct04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:32" (1/1) ... [2021-07-13 20:51:33,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth-correct04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:32" (1/1) ... [2021-07-13 20:51:33,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth-correct04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:32" (1/1) ... [2021-07-13 20:51:33,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth-correct04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:32" (1/1) ... [2021-07-13 20:51:33,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth-correct04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:32" (1/1) ... [2021-07-13 20:51:33,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:51:33,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:51:33,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:51:33,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:51:33,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth-correct04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:32" (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 [2021-07-13 20:51:33,057 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThreadWithAssert given in one single declaration [2021-07-13 20:51:33,057 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThreadWithAssert [2021-07-13 20:51:33,057 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThreadWithAssert [2021-07-13 20:51:33,057 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-07-13 20:51:33,057 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-07-13 20:51:33,057 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-07-13 20:51:33,057 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-07-13 20:51:33,057 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-07-13 20:51:33,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-07-13 20:51:33,058 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:51:33,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:51:33,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:51:33,058 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:51:33,300 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:51:33,300 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-07-13 20:51:33,301 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadWithAssertEXIT is neither atomic block end nor error location. [2021-07-13 20:51:33,301 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-07-13 20:51:33,302 INFO L202 PluginConnector]: Adding new model bluetooth-correct04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:51:33 BoogieIcfgContainer [2021-07-13 20:51:33,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:51:33,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:51:33,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:51:33,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:51:33,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-correct04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:32" (1/2) ... [2021-07-13 20:51:33,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da3a9b0 and model type bluetooth-correct04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:51:33, skipping insertion in model container [2021-07-13 20:51:33,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-correct04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:51:33" (2/2) ... [2021-07-13 20:51:33,307 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth-correct04.bpl [2021-07-13 20:51:33,310 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:51:33,310 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:51:33,310 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:51:33,311 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:51:33,352 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-07-13 20:51:33,367 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-13 20:51:33,380 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:51:33,380 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:51:33,380 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:51:33,380 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:51:33,380 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:51:33,380 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:51:33,380 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:51:33,380 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:51:33,387 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 34 transitions, 93 flow [2021-07-13 20:51:33,416 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 401 states, 399 states have (on average 3.711779448621554) internal successors, (1481), 400 states have internal predecessors, (1481), 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) [2021-07-13 20:51:33,419 INFO L276 IsEmpty]: Start isEmpty. Operand has 401 states, 399 states have (on average 3.711779448621554) internal successors, (1481), 400 states have internal predecessors, (1481), 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) [2021-07-13 20:51:33,438 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 20:51:33,439 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (1/2) [2021-07-13 20:51:33,441 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-13 20:51:33,448 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:51:33,448 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:51:33,448 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:51:33,448 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:51:33,448 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:51:33,449 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:51:33,449 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:51:33,449 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadWithAssertThread1of1ForFork1======== [2021-07-13 20:51:33,451 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 34 transitions, 93 flow [2021-07-13 20:51:33,512 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1619 states, 1618 states have (on average 5.139678615574784) internal successors, (8316), 1618 states have internal predecessors, (8316), 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) [2021-07-13 20:51:33,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 1619 states, 1618 states have (on average 5.139678615574784) internal successors, (8316), 1618 states have internal predecessors, (8316), 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) [2021-07-13 20:51:33,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-07-13 20:51:33,524 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:33,525 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:33,525 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:33,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:33,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1167775337, now seen corresponding path program 1 times [2021-07-13 20:51:33,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:33,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780497164] [2021-07-13 20:51:33,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:33,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:33,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780497164] [2021-07-13 20:51:33,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780497164] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:51:33,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:51:33,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:51:33,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505639304] [2021-07-13 20:51:33,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:51:33,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:33,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:51:33,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:51:33,635 INFO L87 Difference]: Start difference. First operand has 1619 states, 1618 states have (on average 5.139678615574784) internal successors, (8316), 1618 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-07-13 20:51:33,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:33,694 INFO L93 Difference]: Finished difference Result 1753 states and 8829 transitions. [2021-07-13 20:51:33,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:51:33,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2021-07-13 20:51:33,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:33,716 INFO L225 Difference]: With dead ends: 1753 [2021-07-13 20:51:33,717 INFO L226 Difference]: Without dead ends: 1351 [2021-07-13 20:51:33,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:51:33,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-07-13 20:51:33,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1351. [2021-07-13 20:51:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1350 states have (on average 5.002962962962963) internal successors, (6754), 1350 states have internal predecessors, (6754), 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) [2021-07-13 20:51:33,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 6754 transitions. [2021-07-13 20:51:33,875 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 6754 transitions. Word has length 8 [2021-07-13 20:51:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:33,875 INFO L482 AbstractCegarLoop]: Abstraction has 1351 states and 6754 transitions. [2021-07-13 20:51:33,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-07-13 20:51:33,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 6754 transitions. [2021-07-13 20:51:33,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 20:51:33,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:33,877 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:33,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:51:33,877 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:33,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:33,878 INFO L82 PathProgramCache]: Analyzing trace with hash -853559797, now seen corresponding path program 1 times [2021-07-13 20:51:33,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:33,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662576308] [2021-07-13 20:51:33,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:33,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:33,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662576308] [2021-07-13 20:51:33,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662576308] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:51:33,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:51:33,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:51:33,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410035766] [2021-07-13 20:51:33,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:51:33,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:33,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:51:33,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:51:33,914 INFO L87 Difference]: Start difference. First operand 1351 states and 6754 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) [2021-07-13 20:51:33,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:33,941 INFO L93 Difference]: Finished difference Result 1351 states and 5382 transitions. [2021-07-13 20:51:33,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:51:33,942 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 [2021-07-13 20:51:33,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:33,946 INFO L225 Difference]: With dead ends: 1351 [2021-07-13 20:51:33,947 INFO L226 Difference]: Without dead ends: 676 [2021-07-13 20:51:33,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:51:33,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-07-13 20:51:33,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 676. [2021-07-13 20:51:33,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 3.771851851851852) internal successors, (2546), 675 states have internal predecessors, (2546), 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) [2021-07-13 20:51:33,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 2546 transitions. [2021-07-13 20:51:33,965 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 2546 transitions. Word has length 12 [2021-07-13 20:51:33,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:33,965 INFO L482 AbstractCegarLoop]: Abstraction has 676 states and 2546 transitions. [2021-07-13 20:51:33,965 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) [2021-07-13 20:51:33,965 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 2546 transitions. [2021-07-13 20:51:33,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 20:51:33,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:33,967 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:33,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:51:33,967 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:33,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:33,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1226677657, now seen corresponding path program 2 times [2021-07-13 20:51:33,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:33,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562864248] [2021-07-13 20:51:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:34,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:34,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562864248] [2021-07-13 20:51:34,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562864248] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:51:34,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:51:34,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:51:34,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976699363] [2021-07-13 20:51:34,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:51:34,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:34,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:51:34,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:34,032 INFO L87 Difference]: Start difference. First operand 676 states and 2546 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2021-07-13 20:51:34,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:34,091 INFO L93 Difference]: Finished difference Result 1231 states and 4864 transitions. [2021-07-13 20:51:34,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:51:34,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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 [2021-07-13 20:51:34,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:34,097 INFO L225 Difference]: With dead ends: 1231 [2021-07-13 20:51:34,097 INFO L226 Difference]: Without dead ends: 1179 [2021-07-13 20:51:34,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:34,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-07-13 20:51:34,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1089. [2021-07-13 20:51:34,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1088 states have (on average 4.044117647058823) internal successors, (4400), 1088 states have internal predecessors, (4400), 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) [2021-07-13 20:51:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 4400 transitions. [2021-07-13 20:51:34,148 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 4400 transitions. Word has length 12 [2021-07-13 20:51:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:34,148 INFO L482 AbstractCegarLoop]: Abstraction has 1089 states and 4400 transitions. [2021-07-13 20:51:34,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2021-07-13 20:51:34,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 4400 transitions. [2021-07-13 20:51:34,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 20:51:34,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:34,150 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:34,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:51:34,151 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:34,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:34,151 INFO L82 PathProgramCache]: Analyzing trace with hash -832423655, now seen corresponding path program 1 times [2021-07-13 20:51:34,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:34,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864857651] [2021-07-13 20:51:34,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:34,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:34,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864857651] [2021-07-13 20:51:34,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864857651] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:51:34,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:51:34,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 20:51:34,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829368453] [2021-07-13 20:51:34,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:51:34,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:34,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:51:34,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:51:34,232 INFO L87 Difference]: Start difference. First operand 1089 states and 4400 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:34,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:34,314 INFO L93 Difference]: Finished difference Result 1736 states and 7105 transitions. [2021-07-13 20:51:34,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:51:34,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 20:51:34,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:34,322 INFO L225 Difference]: With dead ends: 1736 [2021-07-13 20:51:34,322 INFO L226 Difference]: Without dead ends: 1472 [2021-07-13 20:51:34,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:51:34,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2021-07-13 20:51:34,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1109. [2021-07-13 20:51:34,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1108 states have (on average 4.074909747292419) internal successors, (4515), 1108 states have internal predecessors, (4515), 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) [2021-07-13 20:51:34,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 4515 transitions. [2021-07-13 20:51:34,358 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 4515 transitions. Word has length 15 [2021-07-13 20:51:34,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:34,359 INFO L482 AbstractCegarLoop]: Abstraction has 1109 states and 4515 transitions. [2021-07-13 20:51:34,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:34,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 4515 transitions. [2021-07-13 20:51:34,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:51:34,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:34,361 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:34,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 20:51:34,361 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:34,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:34,361 INFO L82 PathProgramCache]: Analyzing trace with hash -942164409, now seen corresponding path program 1 times [2021-07-13 20:51:34,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:34,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213664995] [2021-07-13 20:51:34,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:34,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:34,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213664995] [2021-07-13 20:51:34,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213664995] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:51:34,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:51:34,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 20:51:34,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619479828] [2021-07-13 20:51:34,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:51:34,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:34,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:51:34,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:51:34,433 INFO L87 Difference]: Start difference. First operand 1109 states and 4515 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:34,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:34,517 INFO L93 Difference]: Finished difference Result 1564 states and 6430 transitions. [2021-07-13 20:51:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:51:34,518 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 20:51:34,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:34,523 INFO L225 Difference]: With dead ends: 1564 [2021-07-13 20:51:34,523 INFO L226 Difference]: Without dead ends: 1048 [2021-07-13 20:51:34,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:51:34,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-07-13 20:51:34,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 829. [2021-07-13 20:51:34,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 4.020531400966184) internal successors, (3329), 828 states have internal predecessors, (3329), 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) [2021-07-13 20:51:34,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 3329 transitions. [2021-07-13 20:51:34,544 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 3329 transitions. Word has length 18 [2021-07-13 20:51:34,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:34,545 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 3329 transitions. [2021-07-13 20:51:34,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:34,545 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 3329 transitions. [2021-07-13 20:51:34,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:51:34,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:34,546 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:34,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 20:51:34,546 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:34,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:34,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976177, now seen corresponding path program 1 times [2021-07-13 20:51:34,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:34,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651877514] [2021-07-13 20:51:34,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:34,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:34,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651877514] [2021-07-13 20:51:34,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651877514] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:51:34,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:51:34,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 20:51:34,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487741936] [2021-07-13 20:51:34,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:51:34,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:34,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:51:34,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:51:34,631 INFO L87 Difference]: Start difference. First operand 829 states and 3329 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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) [2021-07-13 20:51:34,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:34,703 INFO L93 Difference]: Finished difference Result 559 states and 2330 transitions. [2021-07-13 20:51:34,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:51:34,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:51:34,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:34,708 INFO L225 Difference]: With dead ends: 559 [2021-07-13 20:51:34,708 INFO L226 Difference]: Without dead ends: 0 [2021-07-13 20:51:34,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:51:34,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-13 20:51:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-13 20:51:34,709 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) [2021-07-13 20:51:34,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-13 20:51:34,709 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-07-13 20:51:34,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:34,709 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-13 20:51:34,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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) [2021-07-13 20:51:34,709 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-13 20:51:34,709 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 20:51:34,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 20:51:34,710 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadWithAssertThread1of1ForFork1 was SAFE (2/2) [2021-07-13 20:51:34,710 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:51:34,713 INFO L202 PluginConnector]: Adding new model bluetooth-correct04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:51:34 BasicIcfg [2021-07-13 20:51:34,713 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:51:34,715 INFO L168 Benchmark]: Toolchain (without parser) took 1745.48 ms. Allocated memory was 202.4 MB in the beginning and 264.2 MB in the end (delta: 61.9 MB). Free memory was 182.3 MB in the beginning and 166.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 77.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:51:34,715 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 202.4 MB. Free memory is still 183.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:51:34,715 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.76 ms. Allocated memory is still 202.4 MB. Free memory was 182.3 MB in the beginning and 180.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:51:34,715 INFO L168 Benchmark]: Boogie Preprocessor took 10.12 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 179.5 MB in the end (delta: 819.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:51:34,718 INFO L168 Benchmark]: RCFGBuilder took 294.27 ms. Allocated memory is still 202.4 MB. Free memory was 179.3 MB in the beginning and 164.4 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-07-13 20:51:34,718 INFO L168 Benchmark]: TraceAbstraction took 1409.75 ms. Allocated memory was 202.4 MB in the beginning and 264.2 MB in the end (delta: 61.9 MB). Free memory was 164.1 MB in the beginning and 166.6 MB in the end (delta: -2.6 MB). Peak memory consumption was 59.3 MB. Max. memory is 8.0 GB. [2021-07-13 20:51:34,719 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 0.11 ms. Allocated memory is still 202.4 MB. Free memory is still 183.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.76 ms. Allocated memory is still 202.4 MB. Free memory was 182.3 MB in the beginning and 180.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 10.12 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 179.5 MB in the end (delta: 819.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 294.27 ms. Allocated memory is still 202.4 MB. Free memory was 179.3 MB in the beginning and 164.4 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1409.75 ms. Allocated memory was 202.4 MB in the beginning and 264.2 MB in the end (delta: 61.9 MB). Free memory was 164.1 MB in the beginning and 166.6 MB in the end (delta: -2.6 MB). Peak memory consumption was 59.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 37]: 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: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 50 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 60.3ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 21.7ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 35.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=401occurred 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 - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: DeviceThreadWithAssertThread1of1ForFork1 with 1 thread instances CFG has 9 procedures, 50 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1261.8ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 19.4ms, AutomataDifference: 472.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 63.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 195 SDtfs, 236 SDslu, 245 SDs, 0 SdLazy, 270 SolverSat, 123 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 196.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 109.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1619occurred in iteration=0, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 270.2ms AutomataMinimizationTime, 6 MinimizatonAttempts, 672 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 9.9ms SsaConstructionTime, 65.8ms SatisfiabilityAnalysisTime, 264.3ms InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 316 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 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! Received shutdown request...