/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-customized08.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-1c3aa5735269c4be989a50fc1da9ea7b9492ef29-1c3aa57 [2021-07-01 10:04:11,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-01 10:04:11,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-01 10:04:11,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-01 10:04:11,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-01 10:04:11,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-01 10:04:11,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-01 10:04:11,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-01 10:04:11,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-01 10:04:11,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-01 10:04:11,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-01 10:04:11,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-01 10:04:11,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-01 10:04:11,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-01 10:04:11,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-01 10:04:11,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-01 10:04:11,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-01 10:04:11,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-01 10:04:11,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-01 10:04:11,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-01 10:04:11,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-01 10:04:11,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-01 10:04:11,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-01 10:04:11,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-01 10:04:11,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-01 10:04:11,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-01 10:04:11,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-01 10:04:11,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-01 10:04:11,463 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 [2021-07-01 10:04:11,490 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-01 10:04:11,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-01 10:04:11,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-01 10:04:11,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-01 10:04:11,493 INFO L138 SettingsManager]: * Use SBE=true [2021-07-01 10:04:11,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-01 10:04:11,493 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-01 10:04:11,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-01 10:04:11,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-01 10:04:11,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-01 10:04:11,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-01 10:04:11,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-01 10:04:11,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-01 10:04:11,495 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-01 10:04:11,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-01 10:04:11,495 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-01 10:04:11,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-01 10:04:11,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-01 10:04:11,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-01 10:04:11,495 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-01 10:04:11,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-01 10:04:11,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-01 10:04:11,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-01 10:04:11,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-01 10:04:11,496 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-01 10:04:11,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-01 10:04:11,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-01 10:04:11,497 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-01 10:04:11,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-01 10:04:11,497 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-07-01 10:04:11,497 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-01 10:04:11,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-01 10:04:11,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-01 10:04:11,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-01 10:04:11,805 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-01 10:04:11,806 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-01 10:04:11,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-customized08.bpl [2021-07-01 10:04:11,807 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth-customized08.bpl' [2021-07-01 10:04:11,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-01 10:04:11,827 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-01 10:04:11,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-01 10:04:11,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-01 10:04:11,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-01 10:04:11,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth-customized08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:11" (1/1) ... [2021-07-01 10:04:11,846 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth-customized08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:11" (1/1) ... [2021-07-01 10:04:11,860 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-01 10:04:11,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-01 10:04:11,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-01 10:04:11,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-01 10:04:11,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth-customized08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:11" (1/1) ... [2021-07-01 10:04:11,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth-customized08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:11" (1/1) ... [2021-07-01 10:04:11,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth-customized08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:11" (1/1) ... [2021-07-01 10:04:11,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth-customized08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:11" (1/1) ... [2021-07-01 10:04:11,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth-customized08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:11" (1/1) ... [2021-07-01 10:04:11,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth-customized08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:11" (1/1) ... [2021-07-01 10:04:11,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth-customized08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:11" (1/1) ... [2021-07-01 10:04:11,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-01 10:04:11,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-01 10:04:11,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-01 10:04:11,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-01 10:04:11,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth-customized08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-01 10:04:11,925 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThreadWithAssert given in one single declaration [2021-07-01 10:04:11,926 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThreadWithAssert [2021-07-01 10:04:11,927 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThreadWithAssert [2021-07-01 10:04:11,927 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-07-01 10:04:11,927 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-07-01 10:04:11,927 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-07-01 10:04:11,927 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-07-01 10:04:11,927 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-07-01 10:04:11,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-07-01 10:04:11,928 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-01 10:04:11,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-01 10:04:11,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-01 10:04:11,928 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-01 10:04:12,094 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-01 10:04:12,104 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-07-01 10:04:12,105 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadWithAssertEXIT is neither atomic block end nor error location. [2021-07-01 10:04:12,105 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-07-01 10:04:12,106 INFO L202 PluginConnector]: Adding new model bluetooth-customized08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 10:04:12 BoogieIcfgContainer [2021-07-01 10:04:12,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-01 10:04:12,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-01 10:04:12,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-01 10:04:12,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-01 10:04:12,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-customized08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.07 10:04:11" (1/2) ... [2021-07-01 10:04:12,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3179dd82 and model type bluetooth-customized08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 10:04:12, skipping insertion in model container [2021-07-01 10:04:12,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-customized08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 10:04:12" (2/2) ... [2021-07-01 10:04:12,111 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth-customized08.bpl [2021-07-01 10:04:12,114 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-01 10:04:12,115 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-01 10:04:12,115 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-01 10:04:12,115 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-01 10:04:12,182 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-07-01 10:04:12,197 INFO L255 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-07-01 10:04:12,210 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-01 10:04:12,210 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-01 10:04:12,210 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-01 10:04:12,210 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-01 10:04:12,210 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-01 10:04:12,210 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-01 10:04:12,211 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-01 10:04:12,211 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-01 10:04:19,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 32801 states, 27335 states have (on average 3.126870312785806) internal successors, (85473), 32800 states have internal predecessors, (85473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 10:04:19,677 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-01 10:04:19,678 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (1/2) [2021-07-01 10:04:19,679 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-01 10:04:19,682 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-01 10:04:19,682 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-01 10:04:19,682 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-01 10:04:19,682 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-01 10:04:19,682 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-01 10:04:19,682 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-01 10:04:19,682 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-01 10:04:19,683 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadWithAssertThread1of1ForFork1======== [2021-07-01 10:07:35,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 131219 states, 131211 states have (on average 8.803225339338928) internal successors, (1155080), 131218 states have internal predecessors, (1155080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 10:07:35,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-07-01 10:07:35,608 INFO L496 BasicCegarLoop]: Found error trace [2021-07-01 10:07:35,609 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 10:07:35,609 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 10:07:35,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 10:07:35,643 INFO L82 PathProgramCache]: Analyzing trace with hash 440772010, now seen corresponding path program 1 times [2021-07-01 10:07:35,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 10:07:35,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661483348] [2021-07-01 10:07:35,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 10:07:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 10:07:35,787 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:07:35,787 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 10:07:35,794 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:07:35,795 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-01 10:07:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 10:07:35,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 10:07:35,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661483348] [2021-07-01 10:07:35,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661483348] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 10:07:35,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 10:07:35,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-01 10:07:35,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661735839] [2021-07-01 10:07:35,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-01 10:07:35,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 10:07:35,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-01 10:07:35,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-01 10:07:36,062 INFO L87 Difference]: Start difference. First operand has 131219 states, 131211 states have (on average 8.803225339338928) internal successors, (1155080), 131218 states have internal predecessors, (1155080), 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 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 10:07:43,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-01 10:07:43,441 INFO L93 Difference]: Finished difference Result 316237 states and 2788296 transitions. [2021-07-01 10:07:43,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-01 10:07:43,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-07-01 10:07:43,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-01 10:07:48,429 INFO L225 Difference]: With dead ends: 316237 [2021-07-01 10:07:48,430 INFO L226 Difference]: Without dead ends: 316207 [2021-07-01 10:07:48,431 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-01 10:07:57,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316207 states. [2021-07-01 10:08:12,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316207 to 314665. [2021-07-01 10:08:13,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314665 states, 314663 states have (on average 8.834429214747205) internal successors, (2779868), 314664 states have internal predecessors, (2779868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 10:08:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314665 states to 314665 states and 2779868 transitions. [2021-07-01 10:08:19,856 INFO L78 Accepts]: Start accepts. Automaton has 314665 states and 2779868 transitions. Word has length 8 [2021-07-01 10:08:19,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-01 10:08:19,856 INFO L482 AbstractCegarLoop]: Abstraction has 314665 states and 2779868 transitions. [2021-07-01 10:08:19,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-01 10:08:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 314665 states and 2779868 transitions. [2021-07-01 10:08:19,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-01 10:08:19,858 INFO L496 BasicCegarLoop]: Found error trace [2021-07-01 10:08:19,858 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-01 10:08:19,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-01 10:08:19,858 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadWithAssertErr0ASSERT_VIOLATIONASSERT]=== [2021-07-01 10:08:19,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-01 10:08:19,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1619088821, now seen corresponding path program 1 times [2021-07-01 10:08:19,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-01 10:08:19,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382989453] [2021-07-01 10:08:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-01 10:08:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-01 10:08:19,881 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:19,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-01 10:08:19,881 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:19,882 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-01 10:08:19,884 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-01 10:08:19,884 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-01 10:08:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-01 10:08:19,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-01 10:08:19,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382989453] [2021-07-01 10:08:19,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382989453] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-01 10:08:19,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-01 10:08:19,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-01 10:08:19,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088156953] [2021-07-01 10:08:19,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-01 10:08:19,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-01 10:08:19,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-01 10:08:19,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-01 10:08:19,886 INFO L87 Difference]: Start difference. First operand 314665 states and 2779868 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) 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) [2021-07-01 10:08:26,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-01 10:08:26,077 INFO L93 Difference]: Finished difference Result 258517 states and 1773298 transitions. [2021-07-01 10:08:26,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-01 10:08:26,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) 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 [2021-07-01 10:08:26,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-01 10:08:28,048 INFO L225 Difference]: With dead ends: 258517 [2021-07-01 10:08:28,049 INFO L226 Difference]: Without dead ends: 139541 [2021-07-01 10:08:28,049 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6