/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-NewStates.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth03.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d310483fe8b4879eee5de19363f50e4b839cc4ec-d310483 [2021-06-24 18:38:59,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-24 18:38:59,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-24 18:38:59,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-24 18:38:59,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-24 18:38:59,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-24 18:38:59,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-24 18:38:59,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-24 18:38:59,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-24 18:38:59,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-24 18:38:59,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-24 18:38:59,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-24 18:38:59,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-24 18:38:59,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-24 18:38:59,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-24 18:38:59,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-24 18:38:59,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-24 18:38:59,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-24 18:38:59,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-24 18:38:59,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-24 18:38:59,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-24 18:38:59,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-24 18:38:59,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-24 18:38:59,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-24 18:38:59,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-24 18:38:59,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-24 18:38:59,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-24 18:38:59,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-24 18:38:59,439 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-NewStates.epf [2021-06-24 18:38:59,487 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-24 18:38:59,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-24 18:38:59,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-24 18:38:59,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-24 18:38:59,490 INFO L138 SettingsManager]: * Use SBE=true [2021-06-24 18:38:59,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-24 18:38:59,491 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-24 18:38:59,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-24 18:38:59,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-24 18:38:59,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-24 18:38:59,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-24 18:38:59,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-24 18:38:59,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-24 18:38:59,493 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-24 18:38:59,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-24 18:38:59,493 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-24 18:38:59,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-24 18:38:59,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-24 18:38:59,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-24 18:38:59,494 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-24 18:38:59,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-24 18:38:59,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-24 18:38:59,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-24 18:38:59,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-24 18:38:59,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-24 18:38:59,495 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-24 18:38:59,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-24 18:38:59,495 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-24 18:38:59,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-24 18:38:59,496 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_NEW_STATES [2021-06-24 18:38:59,496 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-24 18:38:59,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-24 18:38:59,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-24 18:38:59,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-24 18:38:59,881 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-24 18:38:59,882 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-24 18:38:59,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth03.bpl [2021-06-24 18:38:59,884 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth03.bpl' [2021-06-24 18:38:59,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-24 18:38:59,911 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-24 18:38:59,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-24 18:38:59,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-24 18:38:59,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-24 18:38:59,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/1) ... [2021-06-24 18:38:59,939 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/1) ... [2021-06-24 18:38:59,956 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-24 18:38:59,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-24 18:38:59,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-24 18:38:59,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-24 18:38:59,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/1) ... [2021-06-24 18:38:59,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/1) ... [2021-06-24 18:38:59,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/1) ... [2021-06-24 18:38:59,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/1) ... [2021-06-24 18:38:59,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/1) ... [2021-06-24 18:38:59,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/1) ... [2021-06-24 18:38:59,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/1) ... [2021-06-24 18:38:59,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-24 18:38:59,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-24 18:38:59,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-24 18:38:59,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-24 18:38:59,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (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 [2021-06-24 18:39:00,058 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-06-24 18:39:00,060 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-06-24 18:39:00,060 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-06-24 18:39:00,061 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-06-24 18:39:00,061 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-06-24 18:39:00,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-06-24 18:39:00,061 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-24 18:39:00,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-24 18:39:00,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-24 18:39:00,062 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-24 18:39:00,295 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-24 18:39:00,295 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-06-24 18:39:00,296 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-06-24 18:39:00,297 INFO L202 PluginConnector]: Adding new model bluetooth03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 06:39:00 BoogieIcfgContainer [2021-06-24 18:39:00,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-24 18:39:00,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-24 18:39:00,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-24 18:39:00,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-24 18:39:00,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/2) ... [2021-06-24 18:39:00,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e44028 and model type bluetooth03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 06:39:00, skipping insertion in model container [2021-06-24 18:39:00,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 06:39:00" (2/2) ... [2021-06-24 18:39:00,305 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth03.bpl [2021-06-24 18:39:00,310 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-24 18:39:00,310 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-24 18:39:00,310 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-24 18:39:00,311 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-24 18:39:00,366 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-24 18:39:00,387 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-24 18:39:00,418 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:39:00,419 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:39:00,419 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:39:00,419 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:39:00,419 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:39:00,419 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:39:00,425 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:39:00,425 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-24 18:39:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 238 states, 207 states have (on average 1.7681159420289856) internal successors, (366), 237 states have internal predecessors, (366), 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) [2021-06-24 18:39:00,729 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 18:39:00,730 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (1/4) [2021-06-24 18:39:00,732 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:39:00,746 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:39:00,747 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:39:00,747 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:39:00,747 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:39:00,747 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:39:00,747 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:39:00,747 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:39:00,747 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork2======== [2021-06-24 18:39:01,376 INFO L276 IsEmpty]: Start isEmpty. Operand has 5027 states, 4467 states have (on average 2.7694201925229462) internal successors, (12371), 5026 states have internal predecessors, (12371), 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) [2021-06-24 18:39:01,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-24 18:39:01,384 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:01,385 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:01,385 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:01,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:01,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1820894160, now seen corresponding path program 1 times [2021-06-24 18:39:01,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:01,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331791799] [2021-06-24 18:39:01,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:01,499 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:01,501 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:01,503 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:01,503 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:39:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:01,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:01,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331791799] [2021-06-24 18:39:01,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331791799] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:01,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:01,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:39:01,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917580153] [2021-06-24 18:39:01,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:39:01,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:01,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:39:01,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:39:01,547 INFO L87 Difference]: Start difference. First operand has 5027 states, 4467 states have (on average 2.7694201925229462) internal successors, (12371), 5026 states have internal predecessors, (12371), 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 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-06-24 18:39:01,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:01,633 INFO L93 Difference]: Finished difference Result 4050 states and 8930 transitions. [2021-06-24 18:39:01,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:39:01,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-06-24 18:39:01,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:01,716 INFO L225 Difference]: With dead ends: 4050 [2021-06-24 18:39:01,716 INFO L226 Difference]: Without dead ends: 2464 [2021-06-24 18:39:01,717 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:39:01,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2021-06-24 18:39:01,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 2379. [2021-06-24 18:39:01,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2303 states have (on average 2.3226226660877116) internal successors, (5349), 2378 states have internal predecessors, (5349), 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) [2021-06-24 18:39:01,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 5349 transitions. [2021-06-24 18:39:01,932 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 5349 transitions. Word has length 9 [2021-06-24 18:39:01,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:01,932 INFO L482 AbstractCegarLoop]: Abstraction has 2379 states and 5349 transitions. [2021-06-24 18:39:01,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-06-24 18:39:01,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 5349 transitions. [2021-06-24 18:39:01,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-24 18:39:01,935 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:01,935 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:01,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-24 18:39:01,935 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:01,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:01,936 INFO L82 PathProgramCache]: Analyzing trace with hash -299264878, now seen corresponding path program 1 times [2021-06-24 18:39:01,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:01,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490538386] [2021-06-24 18:39:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:01,950 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:01,951 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:01,951 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:01,952 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:01,955 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:01,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:01,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:01,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:01,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490538386] [2021-06-24 18:39:01,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490538386] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:01,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:01,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:39:01,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317572593] [2021-06-24 18:39:01,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:39:01,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:01,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:39:01,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:39:01,959 INFO L87 Difference]: Start difference. First operand 2379 states and 5349 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2021-06-24 18:39:01,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:01,973 INFO L93 Difference]: Finished difference Result 935 states and 1592 transitions. [2021-06-24 18:39:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:39:01,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 [2021-06-24 18:39:01,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:01,977 INFO L225 Difference]: With dead ends: 935 [2021-06-24 18:39:01,978 INFO L226 Difference]: Without dead ends: 644 [2021-06-24 18:39:01,978 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:39:01,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-24 18:39:01,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 636. [2021-06-24 18:39:01,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 576 states have (on average 1.9427083333333333) internal successors, (1119), 635 states have internal predecessors, (1119), 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) [2021-06-24 18:39:01,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1119 transitions. [2021-06-24 18:39:01,998 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1119 transitions. Word has length 13 [2021-06-24 18:39:01,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:01,998 INFO L482 AbstractCegarLoop]: Abstraction has 636 states and 1119 transitions. [2021-06-24 18:39:01,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2021-06-24 18:39:01,999 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1119 transitions. [2021-06-24 18:39:01,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-24 18:39:01,999 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:01,999 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:02,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-24 18:39:02,000 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:02,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:02,000 INFO L82 PathProgramCache]: Analyzing trace with hash -305138226, now seen corresponding path program 2 times [2021-06-24 18:39:02,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:02,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124279032] [2021-06-24 18:39:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:02,023 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,023 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:39:02,030 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,031 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:02,040 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,040 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:02,048 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,049 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:39:02,053 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,053 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:02,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:02,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124279032] [2021-06-24 18:39:02,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124279032] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:02,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:02,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:39:02,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771019186] [2021-06-24 18:39:02,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:39:02,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:02,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:39:02,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:39:02,056 INFO L87 Difference]: Start difference. First operand 636 states and 1119 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:02,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:02,106 INFO L93 Difference]: Finished difference Result 1127 states and 2081 transitions. [2021-06-24 18:39:02,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:39:02,107 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-24 18:39:02,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:02,112 INFO L225 Difference]: With dead ends: 1127 [2021-06-24 18:39:02,112 INFO L226 Difference]: Without dead ends: 1045 [2021-06-24 18:39:02,112 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:39:02,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-06-24 18:39:02,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 960. [2021-06-24 18:39:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 900 states have (on average 2.0166666666666666) internal successors, (1815), 959 states have internal predecessors, (1815), 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) [2021-06-24 18:39:02,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1815 transitions. [2021-06-24 18:39:02,140 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1815 transitions. Word has length 13 [2021-06-24 18:39:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:02,140 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 1815 transitions. [2021-06-24 18:39:02,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1815 transitions. [2021-06-24 18:39:02,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-24 18:39:02,142 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:02,142 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:02,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-24 18:39:02,142 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:02,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:02,143 INFO L82 PathProgramCache]: Analyzing trace with hash 46901896, now seen corresponding path program 1 times [2021-06-24 18:39:02,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:02,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187173248] [2021-06-24 18:39:02,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:02,165 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,165 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:39:02,169 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:02,176 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,177 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:02,184 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,185 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:02,202 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,202 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:02,203 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,203 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:39:02,207 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,208 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:02,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:02,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187173248] [2021-06-24 18:39:02,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187173248] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:02,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:02,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:39:02,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951294173] [2021-06-24 18:39:02,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:39:02,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:02,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:39:02,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:39:02,211 INFO L87 Difference]: Start difference. First operand 960 states and 1815 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2021-06-24 18:39:02,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:02,264 INFO L93 Difference]: Finished difference Result 1306 states and 2537 transitions. [2021-06-24 18:39:02,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:39:02,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 [2021-06-24 18:39:02,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:02,269 INFO L225 Difference]: With dead ends: 1306 [2021-06-24 18:39:02,269 INFO L226 Difference]: Without dead ends: 908 [2021-06-24 18:39:02,269 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:39:02,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-06-24 18:39:02,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 647. [2021-06-24 18:39:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 597 states have (on average 1.9078726968174204) internal successors, (1139), 646 states have internal predecessors, (1139), 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) [2021-06-24 18:39:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1139 transitions. [2021-06-24 18:39:02,286 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1139 transitions. Word has length 16 [2021-06-24 18:39:02,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:02,286 INFO L482 AbstractCegarLoop]: Abstraction has 647 states and 1139 transitions. [2021-06-24 18:39:02,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2021-06-24 18:39:02,286 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1139 transitions. [2021-06-24 18:39:02,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-24 18:39:02,287 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:02,287 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:02,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-24 18:39:02,287 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:02,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:02,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1300567188, now seen corresponding path program 1 times [2021-06-24 18:39:02,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:02,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216949281] [2021-06-24 18:39:02,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:02,328 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,328 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:39:02,331 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,332 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:02,337 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,338 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:02,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:02,353 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,354 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:02,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,363 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:02,363 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,364 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:02,364 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:39:02,369 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,369 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:02,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:02,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216949281] [2021-06-24 18:39:02,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216949281] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:02,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:02,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:39:02,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722394800] [2021-06-24 18:39:02,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:39:02,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:02,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:39:02,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:39:02,372 INFO L87 Difference]: Start difference. First operand 647 states and 1139 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:02,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:02,419 INFO L93 Difference]: Finished difference Result 483 states and 975 transitions. [2021-06-24 18:39:02,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:39:02,420 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-24 18:39:02,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:02,420 INFO L225 Difference]: With dead ends: 483 [2021-06-24 18:39:02,420 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 18:39:02,421 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:39:02,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 18:39:02,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 18:39:02,422 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) [2021-06-24 18:39:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 18:39:02,422 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-06-24 18:39:02,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:02,422 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 18:39:02,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:02,423 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 18:39:02,423 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 18:39:02,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-24 18:39:02,423 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork2 was SAFE (2/4) [2021-06-24 18:39:02,423 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:39:02,431 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:39:02,431 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:39:02,431 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:39:02,432 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:39:02,432 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:39:02,432 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:39:02,432 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:39:02,432 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork3======== [2021-06-24 18:39:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 5862 states, 5327 states have (on average 2.814342031162005) internal successors, (14992), 5861 states have internal predecessors, (14992), 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) [2021-06-24 18:39:02,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-24 18:39:02,870 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:02,870 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:02,870 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:02,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:02,871 INFO L82 PathProgramCache]: Analyzing trace with hash 613169295, now seen corresponding path program 1 times [2021-06-24 18:39:02,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:02,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528388210] [2021-06-24 18:39:02,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:02,894 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,894 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:02,895 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:02,895 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:39:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:02,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:02,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528388210] [2021-06-24 18:39:02,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528388210] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:02,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:02,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:39:02,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592457998] [2021-06-24 18:39:02,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:39:02,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:02,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:39:02,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:39:02,928 INFO L87 Difference]: Start difference. First operand has 5862 states, 5327 states have (on average 2.814342031162005) internal successors, (14992), 5861 states have internal predecessors, (14992), 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 5.0) internal successors, (10), 3 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) [2021-06-24 18:39:02,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:02,980 INFO L93 Difference]: Finished difference Result 4657 states and 10547 transitions. [2021-06-24 18:39:02,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:39:02,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 [2021-06-24 18:39:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:02,996 INFO L225 Difference]: With dead ends: 4657 [2021-06-24 18:39:02,996 INFO L226 Difference]: Without dead ends: 2819 [2021-06-24 18:39:02,996 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:39:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2021-06-24 18:39:03,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2745. [2021-06-24 18:39:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2745 states, 2665 states have (on average 2.4138836772983114) internal successors, (6433), 2744 states have internal predecessors, (6433), 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) [2021-06-24 18:39:03,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2745 states to 2745 states and 6433 transitions. [2021-06-24 18:39:03,102 INFO L78 Accepts]: Start accepts. Automaton has 2745 states and 6433 transitions. Word has length 10 [2021-06-24 18:39:03,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:03,103 INFO L482 AbstractCegarLoop]: Abstraction has 2745 states and 6433 transitions. [2021-06-24 18:39:03,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2021-06-24 18:39:03,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2745 states and 6433 transitions. [2021-06-24 18:39:03,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-24 18:39:03,105 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:03,105 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:03,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-24 18:39:03,105 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:03,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:03,106 INFO L82 PathProgramCache]: Analyzing trace with hash -687251443, now seen corresponding path program 1 times [2021-06-24 18:39:03,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:03,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011493030] [2021-06-24 18:39:03,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:03,129 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,129 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:03,130 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,130 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:03,132 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,132 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:03,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:03,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011493030] [2021-06-24 18:39:03,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011493030] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:03,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:03,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:39:03,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906354358] [2021-06-24 18:39:03,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:39:03,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:03,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:39:03,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:39:03,135 INFO L87 Difference]: Start difference. First operand 2745 states and 6433 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:03,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:03,145 INFO L93 Difference]: Finished difference Result 1040 states and 1892 transitions. [2021-06-24 18:39:03,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:39:03,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-24 18:39:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:03,152 INFO L225 Difference]: With dead ends: 1040 [2021-06-24 18:39:03,152 INFO L226 Difference]: Without dead ends: 660 [2021-06-24 18:39:03,152 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 [2021-06-24 18:39:03,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-06-24 18:39:03,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 648. [2021-06-24 18:39:03,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 598 states have (on average 2.0869565217391304) internal successors, (1248), 647 states have internal predecessors, (1248), 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) [2021-06-24 18:39:03,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1248 transitions. [2021-06-24 18:39:03,168 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1248 transitions. Word has length 14 [2021-06-24 18:39:03,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:03,168 INFO L482 AbstractCegarLoop]: Abstraction has 648 states and 1248 transitions. [2021-06-24 18:39:03,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:03,169 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1248 transitions. [2021-06-24 18:39:03,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-24 18:39:03,169 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:03,169 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:03,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-24 18:39:03,171 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:03,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:03,172 INFO L82 PathProgramCache]: Analyzing trace with hash 472292749, now seen corresponding path program 2 times [2021-06-24 18:39:03,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:03,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854990633] [2021-06-24 18:39:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:03,204 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,204 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:39:03,209 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,210 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:03,215 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:03,223 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,224 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:39:03,227 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,228 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:03,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:03,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:03,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854990633] [2021-06-24 18:39:03,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854990633] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:03,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:03,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:39:03,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253633224] [2021-06-24 18:39:03,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:39:03,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:03,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:39:03,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:39:03,231 INFO L87 Difference]: Start difference. First operand 648 states and 1248 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:03,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:03,278 INFO L93 Difference]: Finished difference Result 1195 states and 2387 transitions. [2021-06-24 18:39:03,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:39:03,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-24 18:39:03,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:03,284 INFO L225 Difference]: With dead ends: 1195 [2021-06-24 18:39:03,284 INFO L226 Difference]: Without dead ends: 1096 [2021-06-24 18:39:03,287 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:39:03,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-06-24 18:39:03,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1016. [2021-06-24 18:39:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 966 states have (on average 2.1469979296066253) internal successors, (2074), 1015 states have internal predecessors, (2074), 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) [2021-06-24 18:39:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2074 transitions. [2021-06-24 18:39:03,311 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2074 transitions. Word has length 14 [2021-06-24 18:39:03,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:03,311 INFO L482 AbstractCegarLoop]: Abstraction has 1016 states and 2074 transitions. [2021-06-24 18:39:03,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:03,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2074 transitions. [2021-06-24 18:39:03,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-24 18:39:03,313 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:03,313 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:03,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-24 18:39:03,313 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:03,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:03,314 INFO L82 PathProgramCache]: Analyzing trace with hash 481390045, now seen corresponding path program 1 times [2021-06-24 18:39:03,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:03,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147013270] [2021-06-24 18:39:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:03,347 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:39:03,350 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:03,356 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,357 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:03,364 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,364 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:03,371 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,373 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:03,373 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,374 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:39:03,377 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,378 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:03,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:03,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147013270] [2021-06-24 18:39:03,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147013270] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:03,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:03,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:39:03,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351198615] [2021-06-24 18:39:03,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:39:03,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:03,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:39:03,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:39:03,381 INFO L87 Difference]: Start difference. First operand 1016 states and 2074 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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) [2021-06-24 18:39:03,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:03,437 INFO L93 Difference]: Finished difference Result 1413 states and 2857 transitions. [2021-06-24 18:39:03,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:39:03,437 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 [2021-06-24 18:39:03,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:03,441 INFO L225 Difference]: With dead ends: 1413 [2021-06-24 18:39:03,441 INFO L226 Difference]: Without dead ends: 916 [2021-06-24 18:39:03,442 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:39:03,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-06-24 18:39:03,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 648. [2021-06-24 18:39:03,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 598 states have (on average 1.959866220735786) internal successors, (1172), 647 states have internal predecessors, (1172), 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) [2021-06-24 18:39:03,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1172 transitions. [2021-06-24 18:39:03,459 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1172 transitions. Word has length 17 [2021-06-24 18:39:03,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:03,460 INFO L482 AbstractCegarLoop]: Abstraction has 648 states and 1172 transitions. [2021-06-24 18:39:03,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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) [2021-06-24 18:39:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1172 transitions. [2021-06-24 18:39:03,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-24 18:39:03,461 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:03,461 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:03,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-24 18:39:03,461 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:03,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:03,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1208085821, now seen corresponding path program 1 times [2021-06-24 18:39:03,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:03,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506909950] [2021-06-24 18:39:03,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:03,502 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,503 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:39:03,506 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,507 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:03,512 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:03,519 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,520 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:03,527 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,528 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:03,536 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,536 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:03,537 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,538 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:03,538 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,539 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:39:03,544 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,544 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:03,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:03,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506909950] [2021-06-24 18:39:03,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506909950] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:03,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:03,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:39:03,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002630703] [2021-06-24 18:39:03,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:39:03,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:03,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:39:03,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:39:03,547 INFO L87 Difference]: Start difference. First operand 648 states and 1172 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:03,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:03,613 INFO L93 Difference]: Finished difference Result 484 states and 1008 transitions. [2021-06-24 18:39:03,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:39:03,614 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-24 18:39:03,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:03,615 INFO L225 Difference]: With dead ends: 484 [2021-06-24 18:39:03,615 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 18:39:03,616 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:39:03,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 18:39:03,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 18:39:03,616 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) [2021-06-24 18:39:03,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 18:39:03,616 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-06-24 18:39:03,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:03,616 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 18:39:03,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:03,617 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 18:39:03,617 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 18:39:03,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-24 18:39:03,617 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork3 was SAFE (3/4) [2021-06-24 18:39:03,618 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:39:03,618 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:39:03,619 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:39:03,619 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:39:03,619 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:39:03,619 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:39:03,619 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:39:03,619 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:39:03,619 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork1======== [2021-06-24 18:39:03,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 3857 states, 3337 states have (on average 2.7240035960443514) internal successors, (9090), 3856 states have internal predecessors, (9090), 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) [2021-06-24 18:39:03,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-24 18:39:03,908 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:03,908 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:03,908 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:03,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:03,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1028569421, now seen corresponding path program 1 times [2021-06-24 18:39:03,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:03,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104454360] [2021-06-24 18:39:03,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:03,917 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,918 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:03,918 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:03,919 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:39:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:03,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:03,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104454360] [2021-06-24 18:39:03,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104454360] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:03,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:03,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:39:03,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408683806] [2021-06-24 18:39:03,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:39:03,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:03,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:39:03,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:39:03,928 INFO L87 Difference]: Start difference. First operand has 3857 states, 3337 states have (on average 2.7240035960443514) internal successors, (9090), 3856 states have internal predecessors, (9090), 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) [2021-06-24 18:39:03,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:03,960 INFO L93 Difference]: Finished difference Result 3065 states and 6719 transitions. [2021-06-24 18:39:03,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:39:03,961 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 [2021-06-24 18:39:03,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:03,970 INFO L225 Difference]: With dead ends: 3065 [2021-06-24 18:39:03,970 INFO L226 Difference]: Without dead ends: 1896 [2021-06-24 18:39:03,970 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:39:03,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-06-24 18:39:04,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1815. [2021-06-24 18:39:04,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1745 states have (on average 2.286532951289398) internal successors, (3990), 1814 states have internal predecessors, (3990), 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) [2021-06-24 18:39:04,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 3990 transitions. [2021-06-24 18:39:04,023 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 3990 transitions. Word has length 8 [2021-06-24 18:39:04,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:04,023 INFO L482 AbstractCegarLoop]: Abstraction has 1815 states and 3990 transitions. [2021-06-24 18:39:04,023 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) [2021-06-24 18:39:04,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 3990 transitions. [2021-06-24 18:39:04,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-24 18:39:04,024 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:04,024 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:04,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-24 18:39:04,024 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:04,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:04,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2068555851, now seen corresponding path program 1 times [2021-06-24 18:39:04,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:04,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064397276] [2021-06-24 18:39:04,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:04,034 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:04,035 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,035 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:04,038 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,038 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:04,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:04,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064397276] [2021-06-24 18:39:04,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064397276] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:04,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:04,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:39:04,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233059387] [2021-06-24 18:39:04,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:39:04,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:04,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:39:04,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:39:04,040 INFO L87 Difference]: Start difference. First operand 1815 states and 3990 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) [2021-06-24 18:39:04,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:04,049 INFO L93 Difference]: Finished difference Result 786 states and 1172 transitions. [2021-06-24 18:39:04,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:39:04,050 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 [2021-06-24 18:39:04,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:04,052 INFO L225 Difference]: With dead ends: 786 [2021-06-24 18:39:04,052 INFO L226 Difference]: Without dead ends: 517 [2021-06-24 18:39:04,052 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:39:04,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-24 18:39:04,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 509. [2021-06-24 18:39:04,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 449 states have (on average 1.7728285077951003) internal successors, (796), 508 states have internal predecessors, (796), 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) [2021-06-24 18:39:04,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 796 transitions. [2021-06-24 18:39:04,064 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 796 transitions. Word has length 12 [2021-06-24 18:39:04,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:04,064 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 796 transitions. [2021-06-24 18:39:04,064 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) [2021-06-24 18:39:04,064 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 796 transitions. [2021-06-24 18:39:04,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-24 18:39:04,065 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:04,065 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:04,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-24 18:39:04,065 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:04,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:04,066 INFO L82 PathProgramCache]: Analyzing trace with hash 433592779, now seen corresponding path program 2 times [2021-06-24 18:39:04,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:04,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801691102] [2021-06-24 18:39:04,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:04,081 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,082 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:39:04,085 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,086 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:04,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,098 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:04,104 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,105 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:39:04,109 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,109 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:04,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:04,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801691102] [2021-06-24 18:39:04,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801691102] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:04,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:04,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:39:04,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149466211] [2021-06-24 18:39:04,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:39:04,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:04,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:39:04,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:39:04,112 INFO L87 Difference]: Start difference. First operand 509 states and 796 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) [2021-06-24 18:39:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:04,145 INFO L93 Difference]: Finished difference Result 859 states and 1432 transitions. [2021-06-24 18:39:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:39:04,146 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 [2021-06-24 18:39:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:04,149 INFO L225 Difference]: With dead ends: 859 [2021-06-24 18:39:04,149 INFO L226 Difference]: Without dead ends: 777 [2021-06-24 18:39:04,150 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:39:04,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-06-24 18:39:04,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 700. [2021-06-24 18:39:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 640 states have (on average 1.909375) internal successors, (1222), 699 states have internal predecessors, (1222), 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) [2021-06-24 18:39:04,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1222 transitions. [2021-06-24 18:39:04,167 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1222 transitions. Word has length 12 [2021-06-24 18:39:04,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:04,168 INFO L482 AbstractCegarLoop]: Abstraction has 700 states and 1222 transitions. [2021-06-24 18:39:04,168 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) [2021-06-24 18:39:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1222 transitions. [2021-06-24 18:39:04,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-24 18:39:04,169 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:04,169 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:04,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-24 18:39:04,169 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:04,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:04,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1851741694, now seen corresponding path program 1 times [2021-06-24 18:39:04,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:04,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064635406] [2021-06-24 18:39:04,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:04,193 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:39:04,197 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:04,207 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,207 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:04,215 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,216 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:04,223 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,224 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:04,224 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,225 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:39:04,229 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,230 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:04,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:04,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064635406] [2021-06-24 18:39:04,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064635406] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:04,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:04,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:39:04,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64673581] [2021-06-24 18:39:04,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:39:04,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:04,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:39:04,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:39:04,232 INFO L87 Difference]: Start difference. First operand 700 states and 1222 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2021-06-24 18:39:04,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:04,285 INFO L93 Difference]: Finished difference Result 1026 states and 1890 transitions. [2021-06-24 18:39:04,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:39:04,285 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 [2021-06-24 18:39:04,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:04,289 INFO L225 Difference]: With dead ends: 1026 [2021-06-24 18:39:04,289 INFO L226 Difference]: Without dead ends: 760 [2021-06-24 18:39:04,289 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:39:04,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-06-24 18:39:04,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 591. [2021-06-24 18:39:04,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 541 states have (on average 1.88724584103512) internal successors, (1021), 590 states have internal predecessors, (1021), 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) [2021-06-24 18:39:04,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1021 transitions. [2021-06-24 18:39:04,305 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1021 transitions. Word has length 16 [2021-06-24 18:39:04,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:04,306 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1021 transitions. [2021-06-24 18:39:04,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2021-06-24 18:39:04,306 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1021 transitions. [2021-06-24 18:39:04,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-24 18:39:04,307 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:04,307 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:04,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-24 18:39:04,307 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:04,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:04,308 INFO L82 PathProgramCache]: Analyzing trace with hash 265821548, now seen corresponding path program 1 times [2021-06-24 18:39:04,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:04,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672783155] [2021-06-24 18:39:04,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:04,336 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,336 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:39:04,340 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,341 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:04,348 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,352 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:04,360 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,361 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:04,371 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,372 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:04,381 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,381 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:04,382 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,382 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:04,383 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,383 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:39:04,387 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:04,387 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:04,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:04,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672783155] [2021-06-24 18:39:04,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672783155] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:04,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:04,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:39:04,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278327891] [2021-06-24 18:39:04,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:39:04,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:04,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:39:04,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:39:04,389 INFO L87 Difference]: Start difference. First operand 591 states and 1021 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:04,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:04,434 INFO L93 Difference]: Finished difference Result 427 states and 857 transitions. [2021-06-24 18:39:04,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:39:04,435 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-24 18:39:04,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:04,435 INFO L225 Difference]: With dead ends: 427 [2021-06-24 18:39:04,435 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 18:39:04,435 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:39:04,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 18:39:04,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 18:39:04,436 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) [2021-06-24 18:39:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 18:39:04,436 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-06-24 18:39:04,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:04,436 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 18:39:04,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:04,436 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 18:39:04,437 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 18:39:04,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-24 18:39:04,437 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork1 was SAFE (4/4) [2021-06-24 18:39:04,437 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-24 18:39:04,439 INFO L202 PluginConnector]: Adding new model bluetooth03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 06:39:04 BasicIcfg [2021-06-24 18:39:04,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-24 18:39:04,440 INFO L168 Benchmark]: Toolchain (without parser) took 4529.36 ms. Allocated memory was 212.9 MB in the beginning and 447.7 MB in the end (delta: 234.9 MB). Free memory was 192.8 MB in the beginning and 277.0 MB in the end (delta: -84.1 MB). Peak memory consumption was 150.8 MB. Max. memory is 8.0 GB. [2021-06-24 18:39:04,440 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.52 ms. Allocated memory is still 212.9 MB. Free memory is still 193.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-24 18:39:04,440 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.38 ms. Allocated memory is still 212.9 MB. Free memory was 192.8 MB in the beginning and 190.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-24 18:39:04,441 INFO L168 Benchmark]: Boogie Preprocessor took 18.05 ms. Allocated memory is still 212.9 MB. Free memory was 190.9 MB in the beginning and 190.1 MB in the end (delta: 854.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-24 18:39:04,441 INFO L168 Benchmark]: RCFGBuilder took 320.92 ms. Allocated memory is still 212.9 MB. Free memory was 190.1 MB in the beginning and 177.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-24 18:39:04,441 INFO L168 Benchmark]: TraceAbstraction took 4140.10 ms. Allocated memory was 212.9 MB in the beginning and 447.7 MB in the end (delta: 234.9 MB). Free memory was 176.7 MB in the beginning and 277.0 MB in the end (delta: -100.2 MB). Peak memory consumption was 135.1 MB. Max. memory is 8.0 GB. [2021-06-24 18:39:04,442 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 0.52 ms. Allocated memory is still 212.9 MB. Free memory is still 193.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 44.38 ms. Allocated memory is still 212.9 MB. Free memory was 192.8 MB in the beginning and 190.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.05 ms. Allocated memory is still 212.9 MB. Free memory was 190.9 MB in the beginning and 190.1 MB in the end (delta: 854.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 320.92 ms. Allocated memory is still 212.9 MB. Free memory was 190.1 MB in the beginning and 177.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4140.10 ms. Allocated memory was 212.9 MB in the beginning and 447.7 MB in the end (delta: 234.9 MB). Free memory was 176.7 MB in the beginning and 277.0 MB in the end (delta: -100.2 MB). Peak memory consumption was 135.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 663, positive: 551, positive conditional: 551, positive unconditional: 0, negative: 112, negative conditional: 112, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 583, positive: 551, positive conditional: 0, positive unconditional: 551, negative: 32, negative conditional: 0, negative unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 108, positive: 101, positive conditional: 0, positive unconditional: 101, negative: 7, negative conditional: 0, negative unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 108, positive: 91, positive conditional: 0, positive unconditional: 91, negative: 17, negative conditional: 0, negative unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 17, positive: 10, positive conditional: 0, positive unconditional: 10, negative: 7, negative conditional: 0, negative unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 106, positive: 71, positive conditional: 0, positive unconditional: 71, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 583, positive: 450, positive conditional: 0, positive unconditional: 450, negative: 25, negative conditional: 0, negative unconditional: 25, unknown: 108, unknown conditional: 0, unknown unconditional: 108] , Statistics on independence cache: Total cache size (in pairs): 108, Positive cache size: 101, Positive conditional cache size: 0, Positive unconditional cache size: 101, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Independence queries for same thread: 80 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 38493, positive: 32027, positive conditional: 32027, positive unconditional: 0, negative: 6466, negative conditional: 6466, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 34724, positive: 32027, positive conditional: 0, positive unconditional: 32027, negative: 2697, negative conditional: 0, negative unconditional: 2697, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 305, positive: 275, positive conditional: 0, positive unconditional: 275, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 305, positive: 252, positive conditional: 0, positive unconditional: 252, negative: 53, negative conditional: 0, negative unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 53, positive: 23, positive conditional: 0, positive unconditional: 23, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 159, positive: 74, positive conditional: 0, positive unconditional: 74, negative: 85, negative conditional: 0, negative unconditional: 85, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 34724, positive: 31752, positive conditional: 0, positive unconditional: 31752, negative: 2667, negative conditional: 0, negative unconditional: 2667, unknown: 305, unknown conditional: 0, unknown unconditional: 305] , Statistics on independence cache: Total cache size (in pairs): 305, Positive cache size: 275, Positive conditional cache size: 0, Positive unconditional cache size: 275, Negative cache size: 30, Negative conditional cache size: 0, Negative unconditional cache size: 30, Independence queries for same thread: 3769 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 45726, positive: 38460, positive conditional: 38460, positive unconditional: 0, negative: 7266, negative conditional: 7266, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 41535, positive: 38460, positive conditional: 0, positive unconditional: 38460, negative: 3075, negative conditional: 0, negative unconditional: 3075, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 313, positive: 283, positive conditional: 0, positive unconditional: 283, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 313, positive: 259, positive conditional: 0, positive unconditional: 259, negative: 54, negative conditional: 0, negative unconditional: 54, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 54, positive: 24, positive conditional: 0, positive unconditional: 24, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 114, positive: 59, positive conditional: 0, positive unconditional: 59, negative: 55, negative conditional: 0, negative unconditional: 55, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 41535, positive: 38177, positive conditional: 0, positive unconditional: 38177, negative: 3045, negative conditional: 0, negative unconditional: 3045, unknown: 313, unknown conditional: 0, unknown unconditional: 313] , Statistics on independence cache: Total cache size (in pairs): 313, Positive cache size: 283, Positive conditional cache size: 0, Positive unconditional cache size: 283, Negative cache size: 30, Negative conditional cache size: 0, Negative unconditional cache size: 30, Independence queries for same thread: 4191 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 28517, positive: 23875, positive conditional: 23875, positive unconditional: 0, negative: 4642, negative conditional: 4642, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 25781, positive: 23875, positive conditional: 0, positive unconditional: 23875, negative: 1906, negative conditional: 0, negative unconditional: 1906, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 296, positive: 268, positive conditional: 0, positive unconditional: 268, negative: 28, negative conditional: 0, negative unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 296, positive: 247, positive conditional: 0, positive unconditional: 247, negative: 49, negative conditional: 0, negative unconditional: 49, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 49, positive: 21, positive conditional: 0, positive unconditional: 21, negative: 28, negative conditional: 0, negative unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 68, positive: 30, positive conditional: 0, positive unconditional: 30, negative: 38, negative conditional: 0, negative unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 25781, positive: 23607, positive conditional: 0, positive unconditional: 23607, negative: 1878, negative conditional: 0, negative unconditional: 1878, unknown: 296, unknown conditional: 0, unknown unconditional: 296] , Statistics on independence cache: Total cache size (in pairs): 296, Positive cache size: 268, Positive conditional cache size: 0, Positive unconditional cache size: 268, Negative cache size: 28, Negative conditional cache size: 0, Negative unconditional cache size: 28, Independence queries for same thread: 2736 - PositiveResult [Line: 34]: 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 7 procedures, 46 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 314.2ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 38.2ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 266.2ms, PartialOrderReductionTime: 250.9ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=238occurred 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: DeviceThreadThread1of1ForFork2 with 1 thread instances CFG has 7 procedures, 46 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1676.9ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 27.8ms, AutomataDifference: 383.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 613.6ms, PartialOrderReductionTime: 612.3ms, HoareTripleCheckerStatistics: 148 SDtfs, 153 SDslu, 149 SDs, 0 SdLazy, 121 SolverSat, 73 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 108.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 95.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5027occurred in iteration=0, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 255.1ms AutomataMinimizationTime, 5 MinimizatonAttempts, 439 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 8.2ms SsaConstructionTime, 35.7ms SatisfiabilityAnalysisTime, 227.1ms InterpolantComputationTime, 71 NumberOfCodeBlocks, 71 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 243 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: DeviceThreadThread1of1ForFork3 with 1 thread instances CFG has 7 procedures, 46 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1185.9ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 19.1ms, AutomataDifference: 301.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 422.9ms, PartialOrderReductionTime: 421.4ms, HoareTripleCheckerStatistics: 143 SDtfs, 159 SDslu, 149 SDs, 0 SdLazy, 122 SolverSat, 73 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 109.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 70.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5862occurred in iteration=0, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 163.9ms AutomataMinimizationTime, 5 MinimizatonAttempts, 434 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6.3ms SsaConstructionTime, 40.3ms SatisfiabilityAnalysisTime, 193.7ms InterpolantComputationTime, 75 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 70 ConstructedInterpolants, 0 QuantifiedInterpolants, 258 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: DeviceThreadThread1of1ForFork1 with 1 thread instances CFG has 7 procedures, 46 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 818.3ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 8.6ms, AutomataDifference: 204.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 283.2ms, PartialOrderReductionTime: 279.5ms, HoareTripleCheckerStatistics: 146 SDtfs, 159 SDslu, 149 SDs, 0 SdLazy, 122 SolverSat, 73 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 94.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 78.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3857occurred in iteration=0, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 97.1ms AutomataMinimizationTime, 5 MinimizatonAttempts, 335 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.8ms SsaConstructionTime, 21.1ms SatisfiabilityAnalysisTime, 174.6ms InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 234 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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...