/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth03.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d310483fe8b4879eee5de19363f50e4b839cc4ec-d310483 [2021-06-24 18:26:11,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-24 18:26:11,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-24 18:26:11,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-24 18:26:11,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-24 18:26:11,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-24 18:26:11,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-24 18:26:11,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-24 18:26:11,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-24 18:26:11,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-24 18:26:11,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-24 18:26:11,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-24 18:26:11,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-24 18:26:11,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-24 18:26:11,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-24 18:26:11,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-24 18:26:11,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-24 18:26:11,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-24 18:26:11,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-24 18:26:11,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-24 18:26:11,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-24 18:26:11,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-24 18:26:11,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-24 18:26:11,866 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-24 18:26:11,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-24 18:26:11,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-24 18:26:11,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-24 18:26:11,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-24 18:26:11,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-24 18:26:11,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-24 18:26:11,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-24 18:26:11,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-24 18:26:11,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... 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[2021-06-24 18:26:11,896 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-06-24 18:26:11,932 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-24 18:26:11,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-24 18:26:11,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-24 18:26:11,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-24 18:26:11,936 INFO L138 SettingsManager]: * Use SBE=true [2021-06-24 18:26:11,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-24 18:26:11,937 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-24 18:26:11,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-24 18:26:11,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-24 18:26:11,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-24 18:26:11,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-24 18:26:11,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-24 18:26:11,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-24 18:26:11,938 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-24 18:26:11,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-24 18:26:11,939 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-24 18:26:11,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-24 18:26:11,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-24 18:26:11,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-24 18:26:11,939 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-24 18:26:11,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-24 18:26:11,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-24 18:26:11,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-24 18:26:11,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-24 18:26:11,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-24 18:26:11,940 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-24 18:26:11,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-24 18:26:11,941 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-24 18:26:11,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-24 18:26:11,941 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-06-24 18:26:11,941 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-24 18:26:12,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-24 18:26:12,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-24 18:26:12,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-24 18:26:12,299 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-24 18:26:12,301 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-24 18:26:12,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth03.bpl [2021-06-24 18:26:12,302 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth03.bpl' [2021-06-24 18:26:12,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-24 18:26:12,328 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-24 18:26:12,329 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-24 18:26:12,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-24 18:26:12,329 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-24 18:26:12,341 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 06:26:12" (1/1) ... [2021-06-24 18:26:12,347 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 06:26:12" (1/1) ... [2021-06-24 18:26:12,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-24 18:26:12,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-24 18:26:12,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-24 18:26:12,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-24 18:26:12,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (1/1) ... [2021-06-24 18:26:12,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (1/1) ... [2021-06-24 18:26:12,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (1/1) ... [2021-06-24 18:26:12,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (1/1) ... [2021-06-24 18:26:12,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (1/1) ... [2021-06-24 18:26:12,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (1/1) ... [2021-06-24 18:26:12,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (1/1) ... [2021-06-24 18:26:12,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-24 18:26:12,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-24 18:26:12,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-24 18:26:12,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-24 18:26:12,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (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 18:26:12,447 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-06-24 18:26:12,447 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-06-24 18:26:12,448 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-06-24 18:26:12,448 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-06-24 18:26:12,448 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-06-24 18:26:12,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-06-24 18:26:12,448 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-24 18:26:12,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-24 18:26:12,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-24 18:26:12,449 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 18:26:12,662 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-24 18:26:12,662 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-06-24 18:26:12,663 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-06-24 18:26:12,665 INFO L202 PluginConnector]: Adding new model bluetooth03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 06:26:12 BoogieIcfgContainer [2021-06-24 18:26:12,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-24 18:26:12,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-24 18:26:12,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-24 18:26:12,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-24 18:26:12,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (1/2) ... [2021-06-24 18:26:12,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52dbaa61 and model type bluetooth03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 06:26:12, skipping insertion in model container [2021-06-24 18:26:12,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 06:26:12" (2/2) ... [2021-06-24 18:26:12,672 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth03.bpl [2021-06-24 18:26:12,677 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-24 18:26:12,677 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-24 18:26:12,677 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-24 18:26:12,678 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-24 18:26:12,707 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-24 18:26:12,728 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-24 18:26:12,746 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:26:12,746 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:26:12,746 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:26:12,746 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:26:12,746 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:26:12,746 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:26:12,747 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:26:12,747 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-24 18:26:13,090 INFO L276 IsEmpty]: Start isEmpty. Operand has 191 states, 160 states have (on average 1.675) internal successors, (268), 190 states have internal predecessors, (268), 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 18:26:13,106 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 18:26:13,107 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (1/4) [2021-06-24 18:26:13,109 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:26:13,111 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:26:13,112 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:26:13,112 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:26:13,112 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:26:13,112 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:26:13,112 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:26:13,112 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:26:13,112 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork2======== [2021-06-24 18:26:13,514 INFO L276 IsEmpty]: Start isEmpty. Operand has 1361 states, 1329 states have (on average 3.7035364936042137) internal successors, (4922), 1360 states have internal predecessors, (4922), 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 18:26:13,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-24 18:26:13,517 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:13,517 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:13,518 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:13,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:13,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1820894160, now seen corresponding path program 1 times [2021-06-24 18:26:13,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:13,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461299554] [2021-06-24 18:26:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:13,636 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:13,638 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:13,640 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:13,641 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:13,649 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 18:26:13,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:13,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461299554] [2021-06-24 18:26:13,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461299554] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:13,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:13,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:26:13,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068187536] [2021-06-24 18:26:13,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:26:13,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:13,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:26:13,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:13,683 INFO L87 Difference]: Start difference. First operand has 1361 states, 1329 states have (on average 3.7035364936042137) internal successors, (4922), 1360 states have internal predecessors, (4922), 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 18:26:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:13,756 INFO L93 Difference]: Finished difference Result 1339 states and 4432 transitions. [2021-06-24 18:26:13,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:26:13,758 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 18:26:13,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:13,783 INFO L225 Difference]: With dead ends: 1339 [2021-06-24 18:26:13,783 INFO L226 Difference]: Without dead ends: 969 [2021-06-24 18:26:13,784 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:13,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-06-24 18:26:13,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 957. [2021-06-24 18:26:13,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 949 states have (on average 3.3129610115911485) internal successors, (3144), 956 states have internal predecessors, (3144), 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 18:26:13,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3144 transitions. [2021-06-24 18:26:13,916 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3144 transitions. Word has length 9 [2021-06-24 18:26:13,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:13,917 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3144 transitions. [2021-06-24 18:26:13,918 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 18:26:13,918 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3144 transitions. [2021-06-24 18:26:13,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-24 18:26:13,925 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:13,925 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:13,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-24 18:26:13,926 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:13,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:13,934 INFO L82 PathProgramCache]: Analyzing trace with hash -299264878, now seen corresponding path program 1 times [2021-06-24 18:26:13,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:13,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072303911] [2021-06-24 18:26:13,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:13,955 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:13,956 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:13,957 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:13,957 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:13,961 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:13,961 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:13,962 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 18:26:13,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:13,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072303911] [2021-06-24 18:26:13,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072303911] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:13,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:13,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:26:13,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402571242] [2021-06-24 18:26:13,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:26:13,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:13,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:26:13,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:13,968 INFO L87 Difference]: Start difference. First operand 957 states and 3144 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 18:26:13,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:13,993 INFO L93 Difference]: Finished difference Result 943 states and 2583 transitions. [2021-06-24 18:26:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:26:13,994 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 18:26:13,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:13,999 INFO L225 Difference]: With dead ends: 943 [2021-06-24 18:26:13,999 INFO L226 Difference]: Without dead ends: 512 [2021-06-24 18:26:14,001 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-24 18:26:14,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 458. [2021-06-24 18:26:14,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 450 states have (on average 2.66) internal successors, (1197), 457 states have internal predecessors, (1197), 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 18:26:14,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1197 transitions. [2021-06-24 18:26:14,034 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1197 transitions. Word has length 13 [2021-06-24 18:26:14,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:14,034 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1197 transitions. [2021-06-24 18:26:14,034 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 18:26:14,034 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1197 transitions. [2021-06-24 18:26:14,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-24 18:26:14,035 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:14,036 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:14,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-24 18:26:14,036 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:14,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:14,037 INFO L82 PathProgramCache]: Analyzing trace with hash -305138226, now seen corresponding path program 2 times [2021-06-24 18:26:14,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:14,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871422882] [2021-06-24 18:26:14,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:14,118 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,118 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:14,139 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,140 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:14,154 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,156 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:14,175 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,175 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:14,180 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,185 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:14,186 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 18:26:14,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:14,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871422882] [2021-06-24 18:26:14,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871422882] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:14,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:14,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:26:14,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897241730] [2021-06-24 18:26:14,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:26:14,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:14,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:26:14,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:26:14,189 INFO L87 Difference]: Start difference. First operand 458 states and 1197 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 18:26:14,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:14,265 INFO L93 Difference]: Finished difference Result 736 states and 1999 transitions. [2021-06-24 18:26:14,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:26:14,266 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 18:26:14,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:14,270 INFO L225 Difference]: With dead ends: 736 [2021-06-24 18:26:14,271 INFO L226 Difference]: Without dead ends: 714 [2021-06-24 18:26:14,271 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:26:14,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-06-24 18:26:14,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 664. [2021-06-24 18:26:14,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 656 states have (on average 2.8125) internal successors, (1845), 663 states have internal predecessors, (1845), 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 18:26:14,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1845 transitions. [2021-06-24 18:26:14,296 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1845 transitions. Word has length 13 [2021-06-24 18:26:14,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:14,297 INFO L482 AbstractCegarLoop]: Abstraction has 664 states and 1845 transitions. [2021-06-24 18:26:14,297 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 18:26:14,297 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1845 transitions. [2021-06-24 18:26:14,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-24 18:26:14,298 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:14,298 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:14,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-24 18:26:14,299 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:14,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1523709688, now seen corresponding path program 1 times [2021-06-24 18:26:14,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:14,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881798494] [2021-06-24 18:26:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:14,330 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,330 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:14,336 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,337 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:14,344 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:14,359 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,360 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:14,374 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,375 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:14,376 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,376 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:14,383 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,383 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:14,384 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 18:26:14,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:14,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881798494] [2021-06-24 18:26:14,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881798494] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:14,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:14,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:26:14,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639917086] [2021-06-24 18:26:14,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:26:14,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:14,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:26:14,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:26:14,388 INFO L87 Difference]: Start difference. First operand 664 states and 1845 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 18:26:14,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:14,470 INFO L93 Difference]: Finished difference Result 906 states and 2521 transitions. [2021-06-24 18:26:14,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:26:14,471 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 18:26:14,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:14,475 INFO L225 Difference]: With dead ends: 906 [2021-06-24 18:26:14,476 INFO L226 Difference]: Without dead ends: 719 [2021-06-24 18:26:14,476 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:26:14,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-06-24 18:26:14,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 588. [2021-06-24 18:26:14,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 580 states have (on average 2.753448275862069) internal successors, (1597), 587 states have internal predecessors, (1597), 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 18:26:14,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1597 transitions. [2021-06-24 18:26:14,500 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1597 transitions. Word has length 16 [2021-06-24 18:26:14,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:14,500 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1597 transitions. [2021-06-24 18:26:14,500 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 18:26:14,501 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1597 transitions. [2021-06-24 18:26:14,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-24 18:26:14,502 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:14,502 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 18:26:14,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-24 18:26:14,502 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:14,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:14,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1524916732, now seen corresponding path program 1 times [2021-06-24 18:26:14,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:14,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543048619] [2021-06-24 18:26:14,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:14,571 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,572 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:14,575 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,576 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:14,586 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,587 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:14,596 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,599 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:14,608 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,609 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:14,617 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,618 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:14,620 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,620 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:14,621 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:14,625 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:14,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:14,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:14,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543048619] [2021-06-24 18:26:14,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543048619] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:14,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:14,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:26:14,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753697738] [2021-06-24 18:26:14,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:26:14,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:14,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:26:14,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:26:14,639 INFO L87 Difference]: Start difference. First operand 588 states and 1597 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 18:26:14,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:14,701 INFO L93 Difference]: Finished difference Result 340 states and 974 transitions. [2021-06-24 18:26:14,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:26:14,702 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 18:26:14,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:14,702 INFO L225 Difference]: With dead ends: 340 [2021-06-24 18:26:14,702 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 18:26:14,703 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:26:14,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 18:26:14,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 18:26:14,704 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 18:26:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 18:26:14,704 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-06-24 18:26:14,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:14,705 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 18:26:14,705 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 18:26:14,705 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 18:26:14,705 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 18:26:14,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-24 18:26:14,705 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork2 was SAFE (2/4) [2021-06-24 18:26:14,706 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:26:14,707 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:26:14,707 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:26:14,707 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:26:14,707 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:26:14,707 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:26:14,707 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:26:14,707 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:26:14,707 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork3======== [2021-06-24 18:26:14,986 INFO L276 IsEmpty]: Start isEmpty. Operand has 1391 states, 1375 states have (on average 4.058181818181819) internal successors, (5580), 1390 states have internal predecessors, (5580), 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 18:26:14,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-24 18:26:14,987 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:14,987 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:14,987 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:14,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:14,988 INFO L82 PathProgramCache]: Analyzing trace with hash 613169295, now seen corresponding path program 1 times [2021-06-24 18:26:14,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:14,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040745274] [2021-06-24 18:26:14,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:15,012 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,013 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:15,013 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,014 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:15,016 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 18:26:15,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:15,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040745274] [2021-06-24 18:26:15,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040745274] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:15,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:15,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:26:15,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470827474] [2021-06-24 18:26:15,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:26:15,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:15,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:26:15,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:15,026 INFO L87 Difference]: Start difference. First operand has 1391 states, 1375 states have (on average 4.058181818181819) internal successors, (5580), 1390 states have internal predecessors, (5580), 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 18:26:15,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:15,055 INFO L93 Difference]: Finished difference Result 1387 states and 5073 transitions. [2021-06-24 18:26:15,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:26:15,056 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 18:26:15,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:15,064 INFO L225 Difference]: With dead ends: 1387 [2021-06-24 18:26:15,064 INFO L226 Difference]: Without dead ends: 1009 [2021-06-24 18:26:15,065 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 18:26:15,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-06-24 18:26:15,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 997. [2021-06-24 18:26:15,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 993 states have (on average 3.611278952668681) internal successors, (3586), 996 states have internal predecessors, (3586), 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 18:26:15,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 3586 transitions. [2021-06-24 18:26:15,100 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 3586 transitions. Word has length 10 [2021-06-24 18:26:15,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:15,101 INFO L482 AbstractCegarLoop]: Abstraction has 997 states and 3586 transitions. [2021-06-24 18:26:15,101 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 18:26:15,101 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 3586 transitions. [2021-06-24 18:26:15,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-24 18:26:15,103 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:15,103 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:15,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-24 18:26:15,103 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:15,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:15,103 INFO L82 PathProgramCache]: Analyzing trace with hash -687251443, now seen corresponding path program 1 times [2021-06-24 18:26:15,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:15,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851302047] [2021-06-24 18:26:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:15,134 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,135 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:15,135 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,136 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:15,138 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,138 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:15,139 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 18:26:15,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:15,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851302047] [2021-06-24 18:26:15,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851302047] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:15,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:15,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:26:15,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451839337] [2021-06-24 18:26:15,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:26:15,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:15,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:26:15,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:15,140 INFO L87 Difference]: Start difference. First operand 997 states and 3586 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 18:26:15,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:15,157 INFO L93 Difference]: Finished difference Result 985 states and 2999 transitions. [2021-06-24 18:26:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:26:15,157 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 18:26:15,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:15,161 INFO L225 Difference]: With dead ends: 985 [2021-06-24 18:26:15,161 INFO L226 Difference]: Without dead ends: 484 [2021-06-24 18:26:15,161 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:15,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-24 18:26:15,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 436. [2021-06-24 18:26:15,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 432 states have (on average 2.9189814814814814) internal successors, (1261), 435 states have internal predecessors, (1261), 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 18:26:15,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1261 transitions. [2021-06-24 18:26:15,175 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1261 transitions. Word has length 14 [2021-06-24 18:26:15,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:15,175 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1261 transitions. [2021-06-24 18:26:15,175 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 18:26:15,175 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1261 transitions. [2021-06-24 18:26:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-24 18:26:15,176 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:15,177 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:15,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-24 18:26:15,179 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:15,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:15,179 INFO L82 PathProgramCache]: Analyzing trace with hash 472292749, now seen corresponding path program 2 times [2021-06-24 18:26:15,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:15,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750946863] [2021-06-24 18:26:15,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:15,203 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,204 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:15,207 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,208 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:15,215 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,216 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:15,224 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,224 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:15,228 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,229 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:15,229 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 18:26:15,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:15,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750946863] [2021-06-24 18:26:15,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750946863] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:15,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:15,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:26:15,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168652946] [2021-06-24 18:26:15,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:26:15,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:15,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:26:15,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:26:15,232 INFO L87 Difference]: Start difference. First operand 436 states and 1261 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 18:26:15,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:15,281 INFO L93 Difference]: Finished difference Result 713 states and 2144 transitions. [2021-06-24 18:26:15,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:26:15,281 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 18:26:15,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:15,286 INFO L225 Difference]: With dead ends: 713 [2021-06-24 18:26:15,286 INFO L226 Difference]: Without dead ends: 692 [2021-06-24 18:26:15,287 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:26:15,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-06-24 18:26:15,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 646. [2021-06-24 18:26:15,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 642 states have (on average 3.0763239875389408) internal successors, (1975), 645 states have internal predecessors, (1975), 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 18:26:15,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1975 transitions. [2021-06-24 18:26:15,307 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1975 transitions. Word has length 14 [2021-06-24 18:26:15,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:15,308 INFO L482 AbstractCegarLoop]: Abstraction has 646 states and 1975 transitions. [2021-06-24 18:26:15,308 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 18:26:15,308 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1975 transitions. [2021-06-24 18:26:15,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-24 18:26:15,309 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:15,309 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 18:26:15,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-24 18:26:15,310 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:15,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:15,310 INFO L82 PathProgramCache]: Analyzing trace with hash 796876735, now seen corresponding path program 1 times [2021-06-24 18:26:15,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:15,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415834520] [2021-06-24 18:26:15,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:15,342 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,342 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:15,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,346 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:15,352 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,352 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:15,360 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,361 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:15,370 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,370 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:15,371 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,371 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:15,375 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,376 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:15,377 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 18:26:15,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:15,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415834520] [2021-06-24 18:26:15,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415834520] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:15,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:15,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:26:15,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874928947] [2021-06-24 18:26:15,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:26:15,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:15,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:26:15,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:26:15,379 INFO L87 Difference]: Start difference. First operand 646 states and 1975 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 18:26:15,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:15,443 INFO L93 Difference]: Finished difference Result 915 states and 2815 transitions. [2021-06-24 18:26:15,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:26:15,444 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 18:26:15,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:15,448 INFO L225 Difference]: With dead ends: 915 [2021-06-24 18:26:15,448 INFO L226 Difference]: Without dead ends: 727 [2021-06-24 18:26:15,449 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:26:15,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-06-24 18:26:15,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 596. [2021-06-24 18:26:15,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 592 states have (on average 3.0287162162162162) internal successors, (1793), 595 states have internal predecessors, (1793), 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 18:26:15,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1793 transitions. [2021-06-24 18:26:15,473 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1793 transitions. Word has length 17 [2021-06-24 18:26:15,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:15,473 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 1793 transitions. [2021-06-24 18:26:15,474 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 18:26:15,474 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1793 transitions. [2021-06-24 18:26:15,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-24 18:26:15,475 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:15,475 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 18:26:15,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-24 18:26:15,475 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:15,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:15,475 INFO L82 PathProgramCache]: Analyzing trace with hash -646783607, now seen corresponding path program 1 times [2021-06-24 18:26:15,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:15,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446084479] [2021-06-24 18:26:15,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:15,517 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,517 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:15,520 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,521 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:15,527 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,528 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:15,536 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,536 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:15,550 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,551 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:15,572 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,573 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:15,573 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,574 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:15,574 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,574 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:15,579 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,579 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:15,579 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 18:26:15,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:15,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446084479] [2021-06-24 18:26:15,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446084479] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:15,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:15,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:26:15,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293518656] [2021-06-24 18:26:15,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:26:15,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:15,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:26:15,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:26:15,581 INFO L87 Difference]: Start difference. First operand 596 states and 1793 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 18:26:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:15,661 INFO L93 Difference]: Finished difference Result 344 states and 1083 transitions. [2021-06-24 18:26:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:26:15,662 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 18:26:15,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:15,662 INFO L225 Difference]: With dead ends: 344 [2021-06-24 18:26:15,663 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 18:26:15,663 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:26:15,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 18:26:15,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 18:26:15,663 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 18:26:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 18:26:15,663 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-06-24 18:26:15,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:15,664 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 18:26:15,664 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 18:26:15,664 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 18:26:15,664 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 18:26:15,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-24 18:26:15,664 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork3 was SAFE (3/4) [2021-06-24 18:26:15,665 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:26:15,666 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:26:15,666 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:26:15,666 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:26:15,666 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:26:15,666 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:26:15,666 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:26:15,666 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:26:15,666 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork1======== [2021-06-24 18:26:15,879 INFO L276 IsEmpty]: Start isEmpty. Operand has 1355 states, 1243 states have (on average 3.2123893805309733) internal successors, (3993), 1354 states have internal predecessors, (3993), 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 18:26:15,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-24 18:26:15,880 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:15,880 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:15,880 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:15,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:15,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1028569421, now seen corresponding path program 1 times [2021-06-24 18:26:15,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:15,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255987544] [2021-06-24 18:26:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:15,885 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,886 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:15,886 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:15,889 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 18:26:15,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:15,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255987544] [2021-06-24 18:26:15,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255987544] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:15,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:15,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:26:15,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059611898] [2021-06-24 18:26:15,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:26:15,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:15,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:26:15,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:15,895 INFO L87 Difference]: Start difference. First operand has 1355 states, 1243 states have (on average 3.2123893805309733) internal successors, (3993), 1354 states have internal predecessors, (3993), 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 18:26:15,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:15,917 INFO L93 Difference]: Finished difference Result 1261 states and 3505 transitions. [2021-06-24 18:26:15,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:26:15,918 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 18:26:15,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:15,924 INFO L225 Difference]: With dead ends: 1261 [2021-06-24 18:26:15,924 INFO L226 Difference]: Without dead ends: 863 [2021-06-24 18:26:15,924 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:15,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-06-24 18:26:15,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 845. [2021-06-24 18:26:15,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 825 states have (on average 2.964848484848485) internal successors, (2446), 844 states have internal predecessors, (2446), 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 18:26:15,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2446 transitions. [2021-06-24 18:26:15,952 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2446 transitions. Word has length 8 [2021-06-24 18:26:15,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:15,952 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2446 transitions. [2021-06-24 18:26:15,953 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 18:26:15,953 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2446 transitions. [2021-06-24 18:26:15,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-24 18:26:15,953 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:15,954 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:15,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-24 18:26:15,954 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:15,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:15,954 INFO L82 PathProgramCache]: Analyzing trace with hash 2068555851, now seen corresponding path program 1 times [2021-06-24 18:26:15,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:15,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208660646] [2021-06-24 18:26:15,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:15,960 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:15,961 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,961 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:15,964 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,965 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:15,965 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 18:26:15,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:15,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208660646] [2021-06-24 18:26:15,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208660646] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:15,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:15,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:26:15,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864947570] [2021-06-24 18:26:15,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:26:15,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:15,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:26:15,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:15,966 INFO L87 Difference]: Start difference. First operand 845 states and 2446 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 18:26:15,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:15,977 INFO L93 Difference]: Finished difference Result 835 states and 2026 transitions. [2021-06-24 18:26:15,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:26:15,978 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 18:26:15,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:15,980 INFO L225 Difference]: With dead ends: 835 [2021-06-24 18:26:15,980 INFO L226 Difference]: Without dead ends: 472 [2021-06-24 18:26:15,981 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 18:26:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-24 18:26:15,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 434. [2021-06-24 18:26:15,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 414 states have (on average 2.359903381642512) internal successors, (977), 433 states have internal predecessors, (977), 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 18:26:15,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 977 transitions. [2021-06-24 18:26:15,994 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 977 transitions. Word has length 12 [2021-06-24 18:26:15,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:15,994 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 977 transitions. [2021-06-24 18:26:15,994 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 18:26:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 977 transitions. [2021-06-24 18:26:15,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-24 18:26:15,995 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:15,995 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:15,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-24 18:26:15,995 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:15,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:15,995 INFO L82 PathProgramCache]: Analyzing trace with hash 433592779, now seen corresponding path program 2 times [2021-06-24 18:26:15,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:15,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483760754] [2021-06-24 18:26:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:16,003 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,004 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:16,007 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,008 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:16,014 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,015 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:16,022 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,022 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:16,026 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,027 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:16,027 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 18:26:16,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:16,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483760754] [2021-06-24 18:26:16,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483760754] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:16,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:16,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:26:16,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170067302] [2021-06-24 18:26:16,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:26:16,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:16,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:26:16,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:26:16,030 INFO L87 Difference]: Start difference. First operand 434 states and 977 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 18:26:16,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:16,071 INFO L93 Difference]: Finished difference Result 677 states and 1577 transitions. [2021-06-24 18:26:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:26:16,072 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 18:26:16,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:16,075 INFO L225 Difference]: With dead ends: 677 [2021-06-24 18:26:16,075 INFO L226 Difference]: Without dead ends: 651 [2021-06-24 18:26:16,075 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:26:16,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-06-24 18:26:16,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 601. [2021-06-24 18:26:16,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 581 states have (on average 2.4733218588640273) internal successors, (1437), 600 states have internal predecessors, (1437), 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 18:26:16,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1437 transitions. [2021-06-24 18:26:16,095 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1437 transitions. Word has length 12 [2021-06-24 18:26:16,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:16,095 INFO L482 AbstractCegarLoop]: Abstraction has 601 states and 1437 transitions. [2021-06-24 18:26:16,095 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 18:26:16,095 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1437 transitions. [2021-06-24 18:26:16,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-24 18:26:16,096 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:16,096 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:16,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-24 18:26:16,097 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:16,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:16,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1533242798, now seen corresponding path program 1 times [2021-06-24 18:26:16,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:16,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490848587] [2021-06-24 18:26:16,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:16,108 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,109 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:16,112 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,112 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:16,118 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,119 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:16,126 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,126 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:16,134 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,135 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:16,135 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,136 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:16,139 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,140 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:16,140 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 18:26:16,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:16,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490848587] [2021-06-24 18:26:16,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490848587] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:16,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:16,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:26:16,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559294032] [2021-06-24 18:26:16,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:26:16,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:16,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:26:16,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:26:16,142 INFO L87 Difference]: Start difference. First operand 601 states and 1437 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 18:26:16,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:16,193 INFO L93 Difference]: Finished difference Result 813 states and 1933 transitions. [2021-06-24 18:26:16,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:26:16,194 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 18:26:16,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:16,197 INFO L225 Difference]: With dead ends: 813 [2021-06-24 18:26:16,197 INFO L226 Difference]: Without dead ends: 667 [2021-06-24 18:26:16,198 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:26:16,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-06-24 18:26:16,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 542. [2021-06-24 18:26:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 522 states have (on average 2.396551724137931) internal successors, (1251), 541 states have internal predecessors, (1251), 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 18:26:16,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1251 transitions. [2021-06-24 18:26:16,212 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1251 transitions. Word has length 16 [2021-06-24 18:26:16,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:16,212 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1251 transitions. [2021-06-24 18:26:16,212 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 18:26:16,212 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1251 transitions. [2021-06-24 18:26:16,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-24 18:26:16,213 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:16,213 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 18:26:16,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-24 18:26:16,213 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:16,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:16,214 INFO L82 PathProgramCache]: Analyzing trace with hash 46477752, now seen corresponding path program 1 times [2021-06-24 18:26:16,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:16,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699614310] [2021-06-24 18:26:16,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:16,227 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:16,230 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,231 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:16,237 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,237 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:16,244 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:16,253 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,253 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:16,262 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,263 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:16,263 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:16,264 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:16,268 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,269 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:16,269 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 18:26:16,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:16,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699614310] [2021-06-24 18:26:16,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699614310] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:16,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:16,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:26:16,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179656394] [2021-06-24 18:26:16,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:26:16,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:16,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:26:16,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:26:16,271 INFO L87 Difference]: Start difference. First operand 542 states and 1251 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 18:26:16,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:16,331 INFO L93 Difference]: Finished difference Result 308 states and 750 transitions. [2021-06-24 18:26:16,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:26:16,331 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 18:26:16,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:16,332 INFO L225 Difference]: With dead ends: 308 [2021-06-24 18:26:16,332 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 18:26:16,332 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:26:16,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 18:26:16,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 18:26:16,332 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 18:26:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 18:26:16,333 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-06-24 18:26:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:16,333 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 18:26:16,333 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 18:26:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 18:26:16,333 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 18:26:16,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-24 18:26:16,333 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork1 was SAFE (4/4) [2021-06-24 18:26:16,333 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-24 18:26:16,336 INFO L202 PluginConnector]: Adding new model bluetooth03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 06:26:16 BasicIcfg [2021-06-24 18:26:16,336 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-24 18:26:16,337 INFO L168 Benchmark]: Toolchain (without parser) took 4008.93 ms. Allocated memory was 182.5 MB in the beginning and 235.9 MB in the end (delta: 53.5 MB). Free memory was 161.9 MB in the beginning and 202.5 MB in the end (delta: -40.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 8.0 GB. [2021-06-24 18:26:16,337 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.49 ms. Allocated memory is still 182.5 MB. Free memory is still 162.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-24 18:26:16,337 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.24 ms. Allocated memory is still 182.5 MB. Free memory was 161.8 MB in the beginning and 160.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-24 18:26:16,337 INFO L168 Benchmark]: Boogie Preprocessor took 17.76 ms. Allocated memory is still 182.5 MB. Free memory was 160.0 MB in the beginning and 159.2 MB in the end (delta: 845.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-24 18:26:16,337 INFO L168 Benchmark]: RCFGBuilder took 282.37 ms. Allocated memory is still 182.5 MB. Free memory was 159.1 MB in the beginning and 146.2 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-24 18:26:16,338 INFO L168 Benchmark]: TraceAbstraction took 3669.42 ms. Allocated memory was 182.5 MB in the beginning and 235.9 MB in the end (delta: 53.5 MB). Free memory was 145.7 MB in the beginning and 202.5 MB in the end (delta: -56.8 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-24 18:26:16,338 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 0.49 ms. Allocated memory is still 182.5 MB. Free memory is still 162.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 34.24 ms. Allocated memory is still 182.5 MB. Free memory was 161.8 MB in the beginning and 160.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.76 ms. Allocated memory is still 182.5 MB. Free memory was 160.0 MB in the beginning and 159.2 MB in the end (delta: 845.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 282.37 ms. Allocated memory is still 182.5 MB. Free memory was 159.1 MB in the beginning and 146.2 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3669.42 ms. Allocated memory was 182.5 MB in the beginning and 235.9 MB in the end (delta: 53.5 MB). Free memory was 145.7 MB in the beginning and 202.5 MB in the end (delta: -56.8 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 424, positive: 349, positive conditional: 349, positive unconditional: 0, negative: 75, negative conditional: 75, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 375, positive: 349, positive conditional: 0, positive unconditional: 349, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 94, positive: 88, positive conditional: 0, positive unconditional: 88, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 94, positive: 78, positive conditional: 0, positive unconditional: 78, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 16, positive: 10, positive conditional: 0, positive unconditional: 10, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 113, positive: 82, positive conditional: 0, positive unconditional: 82, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 375, positive: 261, positive conditional: 0, positive unconditional: 261, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 94, unknown conditional: 0, unknown unconditional: 94] , Statistics on independence cache: Total cache size (in pairs): 94, Positive cache size: 88, Positive conditional cache size: 0, Positive unconditional cache size: 88, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Independence queries for same thread: 49 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 10752, positive: 8797, positive conditional: 8797, positive unconditional: 0, negative: 1955, negative conditional: 1955, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 9474, positive: 8797, positive conditional: 0, positive unconditional: 8797, negative: 677, negative conditional: 0, negative unconditional: 677, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 259, positive: 231, positive conditional: 0, positive unconditional: 231, 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: 259, positive: 209, positive conditional: 0, positive unconditional: 209, negative: 50, negative conditional: 0, negative unconditional: 50, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 50, positive: 22, positive conditional: 0, positive unconditional: 22, negative: 28, negative conditional: 0, negative unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 154, positive: 63, positive conditional: 0, positive unconditional: 63, negative: 91, negative conditional: 0, negative unconditional: 91, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 9474, positive: 8566, positive conditional: 0, positive unconditional: 8566, negative: 649, negative conditional: 0, negative unconditional: 649, unknown: 259, unknown conditional: 0, unknown unconditional: 259] , Statistics on independence cache: Total cache size (in pairs): 259, Positive cache size: 231, Positive conditional cache size: 0, Positive unconditional cache size: 231, Negative cache size: 28, Negative conditional cache size: 0, Negative unconditional cache size: 28, Independence queries for same thread: 1278 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 11166, positive: 9122, positive conditional: 9122, positive unconditional: 0, negative: 2044, negative conditional: 2044, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 9810, positive: 9122, positive conditional: 0, positive unconditional: 9122, negative: 688, negative conditional: 0, negative unconditional: 688, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 279, positive: 250, positive conditional: 0, positive unconditional: 250, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 279, positive: 228, positive conditional: 0, positive unconditional: 228, negative: 51, negative conditional: 0, negative unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 51, positive: 22, positive conditional: 0, positive unconditional: 22, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 92, positive: 44, positive conditional: 0, positive unconditional: 44, negative: 48, negative conditional: 0, negative unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 9810, positive: 8872, positive conditional: 0, positive unconditional: 8872, negative: 659, negative conditional: 0, negative unconditional: 659, unknown: 279, unknown conditional: 0, unknown unconditional: 279] , Statistics on independence cache: Total cache size (in pairs): 279, Positive cache size: 250, Positive conditional cache size: 0, Positive unconditional cache size: 250, Negative cache size: 29, Negative conditional cache size: 0, Negative unconditional cache size: 29, Independence queries for same thread: 1356 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 9432, positive: 7827, positive conditional: 7827, positive unconditional: 0, negative: 1605, negative conditional: 1605, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 8438, positive: 7827, positive conditional: 0, positive unconditional: 7827, negative: 611, negative conditional: 0, negative unconditional: 611, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 246, positive: 221, positive conditional: 0, positive unconditional: 221, negative: 25, negative conditional: 0, negative unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 246, positive: 200, positive conditional: 0, positive unconditional: 200, negative: 46, negative conditional: 0, negative unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 46, positive: 21, positive conditional: 0, positive unconditional: 21, negative: 25, negative conditional: 0, negative unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 66, positive: 32, positive conditional: 0, positive unconditional: 32, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 8438, positive: 7606, positive conditional: 0, positive unconditional: 7606, negative: 586, negative conditional: 0, negative unconditional: 586, unknown: 246, unknown conditional: 0, unknown unconditional: 246] , Statistics on independence cache: Total cache size (in pairs): 246, Positive cache size: 221, Positive conditional cache size: 0, Positive unconditional cache size: 221, Negative cache size: 25, Negative conditional cache size: 0, Negative unconditional cache size: 25, Independence queries for same thread: 994 - 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: 363.8ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 21.8ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 338.0ms, PartialOrderReductionTime: 317.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=191occurred 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: 1593.8ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 20.8ms, AutomataDifference: 401.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 394.0ms, PartialOrderReductionTime: 392.4ms, HoareTripleCheckerStatistics: 151 SDtfs, 181 SDslu, 155 SDs, 0 SdLazy, 119 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 158.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 128.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1361occurred 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: 202.5ms AutomataMinimizationTime, 5 MinimizatonAttempts, 247 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 13.3ms SsaConstructionTime, 68.1ms SatisfiabilityAnalysisTime, 345.4ms 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: 957.5ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 10.6ms, AutomataDifference: 277.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 273.8ms, PartialOrderReductionTime: 272.4ms, HoareTripleCheckerStatistics: 152 SDtfs, 178 SDslu, 168 SDs, 0 SdLazy, 124 SolverSat, 78 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 121.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 98.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1391occurred 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: 93.8ms AutomataMinimizationTime, 5 MinimizatonAttempts, 237 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.9ms SsaConstructionTime, 36.9ms SatisfiabilityAnalysisTime, 224.1ms 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: 667.3ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 7.8ms, AutomataDifference: 213.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 208.4ms, PartialOrderReductionTime: 207.6ms, HoareTripleCheckerStatistics: 148 SDtfs, 190 SDslu, 155 SDs, 0 SdLazy, 119 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 116.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 79.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1355occurred 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: 74.4ms AutomataMinimizationTime, 5 MinimizatonAttempts, 231 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.1ms SsaConstructionTime, 8.3ms SatisfiabilityAnalysisTime, 130.1ms 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...