/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-NewStates.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth05.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d310483fe8b4879eee5de19363f50e4b839cc4ec-d310483 [2021-06-24 18:38:59,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-24 18:38:59,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-24 18:38:59,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-24 18:38:59,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-24 18:38:59,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-24 18:38:59,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-24 18:38:59,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-24 18:38:59,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-24 18:38:59,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-24 18:38:59,204 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-24 18:38:59,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-24 18:38:59,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-24 18:38:59,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-24 18:38:59,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-24 18:38:59,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-24 18:38:59,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-24 18:38:59,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-24 18:38:59,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-24 18:38:59,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-24 18:38:59,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-24 18:38:59,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-24 18:38:59,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-24 18:38:59,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-24 18:38:59,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-24 18:38:59,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-24 18:38:59,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-24 18:38:59,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-24 18:38:59,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-24 18:38:59,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-24 18:38:59,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-24 18:38:59,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-24 18:38:59,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-24 18:38:59,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-24 18:38:59,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-24 18:38:59,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-24 18:38:59,239 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-NewStates.epf [2021-06-24 18:38:59,268 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-24 18:38:59,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-24 18:38:59,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-24 18:38:59,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-24 18:38:59,270 INFO L138 SettingsManager]: * Use SBE=true [2021-06-24 18:38:59,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-24 18:38:59,271 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-24 18:38:59,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-24 18:38:59,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-24 18:38:59,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-24 18:38:59,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-24 18:38:59,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-24 18:38:59,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-24 18:38:59,272 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-24 18:38:59,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-24 18:38:59,272 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-24 18:38:59,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-24 18:38:59,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-24 18:38:59,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-24 18:38:59,273 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-24 18:38:59,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-24 18:38:59,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-24 18:38:59,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-24 18:38:59,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-24 18:38:59,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-24 18:38:59,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-24 18:38:59,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-24 18:38:59,274 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-24 18:38:59,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-24 18:38:59,274 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_NEW_STATES [2021-06-24 18:38:59,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-24 18:38:59,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-24 18:38:59,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-24 18:38:59,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-24 18:38:59,617 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-24 18:38:59,618 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-24 18:38:59,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth05.bpl [2021-06-24 18:38:59,619 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth05.bpl' [2021-06-24 18:38:59,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-24 18:38:59,641 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-24 18:38:59,642 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-24 18:38:59,642 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-24 18:38:59,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-24 18:38:59,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/1) ... [2021-06-24 18:38:59,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/1) ... [2021-06-24 18:38:59,674 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-24 18:38:59,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-24 18:38:59,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-24 18:38:59,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-24 18:38:59,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/1) ... [2021-06-24 18:38:59,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/1) ... [2021-06-24 18:38:59,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/1) ... [2021-06-24 18:38:59,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/1) ... [2021-06-24 18:38:59,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/1) ... [2021-06-24 18:38:59,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/1) ... [2021-06-24 18:38:59,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/1) ... [2021-06-24 18:38:59,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-24 18:38:59,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-24 18:38:59,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-24 18:38:59,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-24 18:38:59,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-24 18:38:59,744 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-06-24 18:38:59,745 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-06-24 18:38:59,745 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-06-24 18:38:59,745 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-06-24 18:38:59,745 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-06-24 18:38:59,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-06-24 18:38:59,745 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-24 18:38:59,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-24 18:38:59,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-24 18:38:59,746 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 18:38:59,969 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-24 18:38:59,969 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-06-24 18:38:59,970 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-06-24 18:38:59,971 INFO L202 PluginConnector]: Adding new model bluetooth05.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 06:38:59 BoogieIcfgContainer [2021-06-24 18:38:59,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-24 18:38:59,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-24 18:38:59,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-24 18:38:59,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-24 18:38:59,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:38:59" (1/2) ... [2021-06-24 18:38:59,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f8b8954 and model type bluetooth05.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 06:38:59, skipping insertion in model container [2021-06-24 18:38:59,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth05.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 06:38:59" (2/2) ... [2021-06-24 18:38:59,975 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth05.bpl [2021-06-24 18:38:59,979 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-24 18:38:59,979 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-24 18:38:59,979 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-24 18:38:59,979 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-24 18:39:00,035 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-24 18:39:00,051 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-24 18:39:00,075 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:39:00,076 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:39:00,076 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:39:00,076 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:39:00,076 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:39:00,076 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:39:00,076 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:39:00,076 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-24 18:39:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 8750 states, 7969 states have (on average 2.938260760446731) internal successors, (23415), 8749 states have internal predecessors, (23415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:01,166 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 18:39:01,167 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (1/6) [2021-06-24 18:39:01,169 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:39:01,170 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:39:01,170 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:39:01,170 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:39:01,170 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:39:01,170 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:39:01,171 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:39:01,171 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:39:01,171 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork4======== [2021-06-24 18:39:16,884 INFO L276 IsEmpty]: Start isEmpty. Operand has 275682 states, 261842 states have (on average 4.09772687345804) internal successors, (1072957), 275681 states have internal predecessors, (1072957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:16,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-24 18:39:16,885 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:16,886 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:16,886 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:16,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:16,890 INFO L82 PathProgramCache]: Analyzing trace with hash -783960483, now seen corresponding path program 1 times [2021-06-24 18:39:16,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:16,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748392507] [2021-06-24 18:39:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:16,965 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:16,965 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:16,966 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:16,966 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:39:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:16,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:16,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748392507] [2021-06-24 18:39:16,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748392507] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:16,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:16,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:39:16,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923122286] [2021-06-24 18:39:16,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:39:16,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:16,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:39:16,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:39:17,255 INFO L87 Difference]: Start difference. First operand has 275682 states, 261842 states have (on average 4.09772687345804) internal successors, (1072957), 275681 states have internal predecessors, (1072957), 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 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:19,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:19,539 INFO L93 Difference]: Finished difference Result 187101 states and 632044 transitions. [2021-06-24 18:39:19,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:39:19,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2021-06-24 18:39:19,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:20,571 INFO L225 Difference]: With dead ends: 187101 [2021-06-24 18:39:20,571 INFO L226 Difference]: Without dead ends: 108545 [2021-06-24 18:39:20,572 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:39:21,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108545 states. [2021-06-24 18:39:24,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108545 to 106524. [2021-06-24 18:39:24,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106524 states, 104576 states have (on average 3.5066458843329253) internal successors, (366711), 106523 states have internal predecessors, (366711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:25,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106524 states to 106524 states and 366711 transitions. [2021-06-24 18:39:25,753 INFO L78 Accepts]: Start accepts. Automaton has 106524 states and 366711 transitions. Word has length 11 [2021-06-24 18:39:25,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:25,756 INFO L482 AbstractCegarLoop]: Abstraction has 106524 states and 366711 transitions. [2021-06-24 18:39:25,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:25,757 INFO L276 IsEmpty]: Start isEmpty. Operand 106524 states and 366711 transitions. [2021-06-24 18:39:25,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-24 18:39:25,781 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:25,781 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:25,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-24 18:39:25,782 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:25,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:25,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1307936677, now seen corresponding path program 1 times [2021-06-24 18:39:25,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:25,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176532253] [2021-06-24 18:39:25,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:25,841 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:25,842 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:39:25,847 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:25,847 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:25,857 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:25,858 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:26,107 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:26,107 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:39:26,111 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:26,112 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:26,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:26,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176532253] [2021-06-24 18:39:26,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176532253] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:26,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:26,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:39:26,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100923045] [2021-06-24 18:39:26,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:39:26,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:26,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:39:26,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:39:26,117 INFO L87 Difference]: Start difference. First operand 106524 states and 366711 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:27,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:27,816 INFO L93 Difference]: Finished difference Result 174462 states and 616131 transitions. [2021-06-24 18:39:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:39:27,817 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-24 18:39:27,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:28,863 INFO L225 Difference]: With dead ends: 174462 [2021-06-24 18:39:28,863 INFO L226 Difference]: Without dead ends: 173186 [2021-06-24 18:39:28,864 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:39:29,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173186 states. [2021-06-24 18:39:32,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173186 to 165328. [2021-06-24 18:39:33,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165328 states, 163380 states have (on average 3.6300954829232466) internal successors, (593085), 165327 states have internal predecessors, (593085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:34,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165328 states to 165328 states and 593085 transitions. [2021-06-24 18:39:34,215 INFO L78 Accepts]: Start accepts. Automaton has 165328 states and 593085 transitions. Word has length 15 [2021-06-24 18:39:34,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:34,223 INFO L482 AbstractCegarLoop]: Abstraction has 165328 states and 593085 transitions. [2021-06-24 18:39:34,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:34,223 INFO L276 IsEmpty]: Start isEmpty. Operand 165328 states and 593085 transitions. [2021-06-24 18:39:34,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-24 18:39:34,233 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:34,234 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:34,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-24 18:39:34,234 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:34,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:34,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1143741281, now seen corresponding path program 2 times [2021-06-24 18:39:34,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:34,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562495908] [2021-06-24 18:39:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:34,253 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:34,256 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:34,257 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:34,257 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:34,259 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:34,259 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:34,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:34,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562495908] [2021-06-24 18:39:34,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562495908] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:34,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:34,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:39:34,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39966871] [2021-06-24 18:39:34,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:39:34,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:34,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:39:34,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:39:34,262 INFO L87 Difference]: Start difference. First operand 165328 states and 593085 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:34,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:34,819 INFO L93 Difference]: Finished difference Result 51765 states and 172089 transitions. [2021-06-24 18:39:34,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:39:34,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-24 18:39:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:34,940 INFO L225 Difference]: With dead ends: 51765 [2021-06-24 18:39:34,941 INFO L226 Difference]: Without dead ends: 41999 [2021-06-24 18:39:34,941 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:39:35,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41999 states. [2021-06-24 18:39:35,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41999 to 41360. [2021-06-24 18:39:35,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41360 states, 39860 states have (on average 3.3523833416959357) internal successors, (133626), 41359 states have internal predecessors, (133626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41360 states to 41360 states and 133626 transitions. [2021-06-24 18:39:35,944 INFO L78 Accepts]: Start accepts. Automaton has 41360 states and 133626 transitions. Word has length 15 [2021-06-24 18:39:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:35,944 INFO L482 AbstractCegarLoop]: Abstraction has 41360 states and 133626 transitions. [2021-06-24 18:39:35,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:35,945 INFO L276 IsEmpty]: Start isEmpty. Operand 41360 states and 133626 transitions. [2021-06-24 18:39:35,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-24 18:39:35,958 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:35,958 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:35,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-24 18:39:35,958 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:35,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:35,961 INFO L82 PathProgramCache]: Analyzing trace with hash 686006939, now seen corresponding path program 1 times [2021-06-24 18:39:35,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:35,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361477221] [2021-06-24 18:39:35,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:35,990 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:35,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:39:35,993 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:35,995 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:35,999 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:36,002 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:36,007 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:36,008 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:36,015 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:36,016 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:36,016 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:36,016 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:39:36,019 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:36,020 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:36,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:36,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361477221] [2021-06-24 18:39:36,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361477221] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:36,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:36,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:39:36,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684878021] [2021-06-24 18:39:36,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:39:36,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:36,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:39:36,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:39:36,023 INFO L87 Difference]: Start difference. First operand 41360 states and 133626 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:36,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:36,717 INFO L93 Difference]: Finished difference Result 77085 states and 256952 transitions. [2021-06-24 18:39:36,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:39:36,718 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-24 18:39:36,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:36,926 INFO L225 Difference]: With dead ends: 77085 [2021-06-24 18:39:36,926 INFO L226 Difference]: Without dead ends: 71964 [2021-06-24 18:39:36,926 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:39:37,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71964 states. [2021-06-24 18:39:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71964 to 50077. [2021-06-24 18:39:38,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50077 states, 48577 states have (on average 3.3856557630154187) internal successors, (164465), 50076 states have internal predecessors, (164465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50077 states to 50077 states and 164465 transitions. [2021-06-24 18:39:38,545 INFO L78 Accepts]: Start accepts. Automaton has 50077 states and 164465 transitions. Word has length 18 [2021-06-24 18:39:38,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:38,546 INFO L482 AbstractCegarLoop]: Abstraction has 50077 states and 164465 transitions. [2021-06-24 18:39:38,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:38,546 INFO L276 IsEmpty]: Start isEmpty. Operand 50077 states and 164465 transitions. [2021-06-24 18:39:38,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-24 18:39:38,775 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:38,775 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, 1] [2021-06-24 18:39:38,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-24 18:39:38,775 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:38,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:38,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1602172950, now seen corresponding path program 1 times [2021-06-24 18:39:38,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:38,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660159135] [2021-06-24 18:39:38,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:38,829 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:38,829 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:39:38,832 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:38,832 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:38,836 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:38,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:38,849 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:38,850 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:38,856 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:38,857 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:38,864 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:38,864 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:38,865 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:38,866 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:38,866 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:38,866 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:39:38,869 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:38,869 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:38,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:38,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660159135] [2021-06-24 18:39:38,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660159135] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:38,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:38,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:39:38,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586906986] [2021-06-24 18:39:38,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:39:38,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:38,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:39:38,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:39:38,876 INFO L87 Difference]: Start difference. First operand 50077 states and 164465 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:39,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:39,375 INFO L93 Difference]: Finished difference Result 85898 states and 291085 transitions. [2021-06-24 18:39:39,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:39:39,375 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-24 18:39:39,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:39,553 INFO L225 Difference]: With dead ends: 85898 [2021-06-24 18:39:39,554 INFO L226 Difference]: Without dead ends: 67256 [2021-06-24 18:39:39,554 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:39:40,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67256 states. [2021-06-24 18:39:40,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67256 to 41338. [2021-06-24 18:39:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41338 states, 39838 states have (on average 3.314548923138712) internal successors, (132045), 41337 states have internal predecessors, (132045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:40,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41338 states to 41338 states and 132045 transitions. [2021-06-24 18:39:40,918 INFO L78 Accepts]: Start accepts. Automaton has 41338 states and 132045 transitions. Word has length 21 [2021-06-24 18:39:40,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:40,919 INFO L482 AbstractCegarLoop]: Abstraction has 41338 states and 132045 transitions. [2021-06-24 18:39:40,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:40,919 INFO L276 IsEmpty]: Start isEmpty. Operand 41338 states and 132045 transitions. [2021-06-24 18:39:40,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-24 18:39:40,943 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:40,943 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, 1, 1, 1, 1] [2021-06-24 18:39:40,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-24 18:39:40,944 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:40,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:40,944 INFO L82 PathProgramCache]: Analyzing trace with hash 542997882, now seen corresponding path program 1 times [2021-06-24 18:39:40,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:40,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903064831] [2021-06-24 18:39:40,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:40,966 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:40,966 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:39:40,969 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:40,969 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:40,973 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:40,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:40,979 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:40,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:40,985 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:40,985 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:40,992 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:40,993 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:41,000 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:41,000 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:41,001 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:41,001 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:41,001 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:41,002 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:41,002 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:41,002 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:39:41,006 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:41,006 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:41,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:41,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903064831] [2021-06-24 18:39:41,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903064831] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:41,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:41,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 18:39:41,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978669940] [2021-06-24 18:39:41,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 18:39:41,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:41,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 18:39:41,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:39:41,008 INFO L87 Difference]: Start difference. First operand 41338 states and 132045 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:41,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:41,573 INFO L93 Difference]: Finished difference Result 56085 states and 186878 transitions. [2021-06-24 18:39:41,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 18:39:41,573 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 24 [2021-06-24 18:39:41,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:41,640 INFO L225 Difference]: With dead ends: 56085 [2021-06-24 18:39:41,641 INFO L226 Difference]: Without dead ends: 26966 [2021-06-24 18:39:41,641 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:39:41,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26966 states. [2021-06-24 18:39:42,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26966 to 16343. [2021-06-24 18:39:42,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16343 states, 15093 states have (on average 3.025906049161863) internal successors, (45670), 16342 states have internal predecessors, (45670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:42,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16343 states to 16343 states and 45670 transitions. [2021-06-24 18:39:42,156 INFO L78 Accepts]: Start accepts. Automaton has 16343 states and 45670 transitions. Word has length 24 [2021-06-24 18:39:42,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:42,156 INFO L482 AbstractCegarLoop]: Abstraction has 16343 states and 45670 transitions. [2021-06-24 18:39:42,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:42,156 INFO L276 IsEmpty]: Start isEmpty. Operand 16343 states and 45670 transitions. [2021-06-24 18:39:42,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-24 18:39:42,165 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:42,165 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:42,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-24 18:39:42,165 INFO L430 AbstractCegarLoop]: === Iteration 7 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:42,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:42,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1104319176, now seen corresponding path program 1 times [2021-06-24 18:39:42,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:42,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519043351] [2021-06-24 18:39:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:42,187 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:42,187 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:39:42,189 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:42,190 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:42,194 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:42,194 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:42,200 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:42,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:42,206 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:42,206 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:42,213 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:42,213 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:42,220 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:42,221 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:42,229 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:42,229 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:42,230 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:42,230 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:42,231 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:42,231 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:42,232 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:42,232 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:39:42,232 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:42,233 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:39:42,235 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:42,236 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:42,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:42,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:42,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519043351] [2021-06-24 18:39:42,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519043351] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:42,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:42,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-24 18:39:42,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069375294] [2021-06-24 18:39:42,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-24 18:39:42,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:42,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-24 18:39:42,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 18:39:42,237 INFO L87 Difference]: Start difference. First operand 16343 states and 45670 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:42,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:39:42,399 INFO L93 Difference]: Finished difference Result 12819 states and 42146 transitions. [2021-06-24 18:39:42,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-24 18:39:42,400 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 28 [2021-06-24 18:39:42,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:39:42,400 INFO L225 Difference]: With dead ends: 12819 [2021-06-24 18:39:42,400 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 18:39:42,401 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 18:39:42,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 18:39:42,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 18:39:42,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:42,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 18:39:42,401 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-06-24 18:39:42,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:39:42,401 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 18:39:42,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:42,401 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 18:39:42,401 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 18:39:42,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-24 18:39:42,401 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork4 was SAFE (2/6) [2021-06-24 18:39:42,402 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:39:42,402 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:39:42,402 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:39:42,402 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:39:42,402 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:39:42,402 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:39:42,402 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:39:42,402 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:39:42,403 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork5======== [2021-06-24 18:39:58,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 299156 states, 286401 states have (on average 4.085837689114214) internal successors, (1170188), 299155 states have internal predecessors, (1170188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:39:58,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-24 18:39:58,381 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:39:58,381 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:39:58,381 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:39:58,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:39:58,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1467067444, now seen corresponding path program 1 times [2021-06-24 18:39:58,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:39:58,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341791678] [2021-06-24 18:39:58,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:39:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:39:58,419 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:58,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:39:58,422 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:39:58,422 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:39:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:39:58,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:39:58,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341791678] [2021-06-24 18:39:58,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341791678] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:39:58,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:39:58,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:39:58,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857185441] [2021-06-24 18:39:58,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:39:58,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:39:58,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:39:58,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:39:58,748 INFO L87 Difference]: Start difference. First operand has 299156 states, 286401 states have (on average 4.085837689114214) internal successors, (1170188), 299155 states have internal predecessors, (1170188), 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 6.0) 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 18:40:00,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:40:00,649 INFO L93 Difference]: Finished difference Result 202080 states and 687865 transitions. [2021-06-24 18:40:00,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:40:00,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) 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 18:40:00,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:40:01,066 INFO L225 Difference]: With dead ends: 202080 [2021-06-24 18:40:01,066 INFO L226 Difference]: Without dead ends: 113830 [2021-06-24 18:40:01,066 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:40:01,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113830 states. [2021-06-24 18:40:03,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113830 to 112270. [2021-06-24 18:40:03,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112270 states, 110310 states have (on average 3.6291360710724323) internal successors, (400330), 112269 states have internal predecessors, (400330), 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 18:40:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112270 states to 112270 states and 400330 transitions. [2021-06-24 18:40:04,353 INFO L78 Accepts]: Start accepts. Automaton has 112270 states and 400330 transitions. Word has length 12 [2021-06-24 18:40:04,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:40:04,353 INFO L482 AbstractCegarLoop]: Abstraction has 112270 states and 400330 transitions. [2021-06-24 18:40:04,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 6.0) 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 18:40:04,353 INFO L276 IsEmpty]: Start isEmpty. Operand 112270 states and 400330 transitions. [2021-06-24 18:40:04,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-24 18:40:04,365 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:40:04,365 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:40:04,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-24 18:40:04,365 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:40:04,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:40:04,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1295829710, now seen corresponding path program 1 times [2021-06-24 18:40:04,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:40:04,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479505316] [2021-06-24 18:40:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:40:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:40:04,377 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:04,377 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:40:04,380 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:04,380 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:04,385 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:04,386 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:04,393 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:04,393 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:40:04,396 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:04,396 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:40:04,396 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 18:40:04,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:40:04,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479505316] [2021-06-24 18:40:04,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479505316] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:40:04,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:40:04,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:40:04,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143327236] [2021-06-24 18:40:04,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:40:04,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:40:04,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:40:04,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:40:04,398 INFO L87 Difference]: Start difference. First operand 112270 states and 400330 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:40:06,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:40:06,113 INFO L93 Difference]: Finished difference Result 184619 states and 669254 transitions. [2021-06-24 18:40:06,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:40:06,113 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-24 18:40:06,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:40:06,750 INFO L225 Difference]: With dead ends: 184619 [2021-06-24 18:40:06,751 INFO L226 Difference]: Without dead ends: 183236 [2021-06-24 18:40:06,751 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:40:07,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183236 states. [2021-06-24 18:40:10,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183236 to 175390. [2021-06-24 18:40:11,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175390 states, 173430 states have (on average 3.723092890503373) internal successors, (645696), 175389 states have internal predecessors, (645696), 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 18:40:12,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175390 states to 175390 states and 645696 transitions. [2021-06-24 18:40:12,315 INFO L78 Accepts]: Start accepts. Automaton has 175390 states and 645696 transitions. Word has length 16 [2021-06-24 18:40:12,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:40:12,316 INFO L482 AbstractCegarLoop]: Abstraction has 175390 states and 645696 transitions. [2021-06-24 18:40:12,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:40:12,316 INFO L276 IsEmpty]: Start isEmpty. Operand 175390 states and 645696 transitions. [2021-06-24 18:40:12,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-24 18:40:12,336 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:40:12,336 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:40:12,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-24 18:40:12,337 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:40:12,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:40:12,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1096202702, now seen corresponding path program 2 times [2021-06-24 18:40:12,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:40:12,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943355734] [2021-06-24 18:40:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:40:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:40:12,348 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:12,349 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:40:12,349 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:12,349 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:40:12,351 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:12,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:40:12,351 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 18:40:12,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:40:12,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943355734] [2021-06-24 18:40:12,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943355734] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:40:12,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:40:12,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:40:12,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799363081] [2021-06-24 18:40:12,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:40:12,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:40:12,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:40:12,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:40:12,353 INFO L87 Difference]: Start difference. First operand 175390 states and 645696 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 18:40:12,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:40:12,638 INFO L93 Difference]: Finished difference Result 55273 states and 186780 transitions. [2021-06-24 18:40:12,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:40:12,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 18:40:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:40:13,095 INFO L225 Difference]: With dead ends: 55273 [2021-06-24 18:40:13,096 INFO L226 Difference]: Without dead ends: 43453 [2021-06-24 18:40:13,096 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 [2021-06-24 18:40:13,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43453 states. [2021-06-24 18:40:13,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43453 to 42756. [2021-06-24 18:40:13,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42756 states, 41506 states have (on average 3.4315520647617213) internal successors, (142430), 42755 states have internal predecessors, (142430), 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 18:40:14,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42756 states to 42756 states and 142430 transitions. [2021-06-24 18:40:14,048 INFO L78 Accepts]: Start accepts. Automaton has 42756 states and 142430 transitions. Word has length 16 [2021-06-24 18:40:14,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:40:14,048 INFO L482 AbstractCegarLoop]: Abstraction has 42756 states and 142430 transitions. [2021-06-24 18:40:14,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 18:40:14,048 INFO L276 IsEmpty]: Start isEmpty. Operand 42756 states and 142430 transitions. [2021-06-24 18:40:14,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-24 18:40:14,066 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:40:14,066 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:40:14,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-24 18:40:14,066 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:40:14,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:40:14,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1958346386, now seen corresponding path program 1 times [2021-06-24 18:40:14,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:40:14,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198657744] [2021-06-24 18:40:14,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:40:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:40:14,083 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:14,084 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:40:14,086 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:14,086 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:14,091 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:14,091 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:14,099 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:14,099 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:14,115 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:14,116 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:14,116 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:14,117 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:40:14,119 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:14,120 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:40:14,120 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 18:40:14,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:40:14,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198657744] [2021-06-24 18:40:14,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198657744] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:40:14,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:40:14,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:40:14,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124179486] [2021-06-24 18:40:14,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:40:14,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:40:14,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:40:14,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:40:14,121 INFO L87 Difference]: Start difference. First operand 42756 states and 142430 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:40:14,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:40:14,821 INFO L93 Difference]: Finished difference Result 80438 states and 274178 transitions. [2021-06-24 18:40:14,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:40:14,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-24 18:40:14,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:40:15,039 INFO L225 Difference]: With dead ends: 80438 [2021-06-24 18:40:15,039 INFO L226 Difference]: Without dead ends: 74191 [2021-06-24 18:40:15,039 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:40:15,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74191 states. [2021-06-24 18:40:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74191 to 51321. [2021-06-24 18:40:16,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51321 states, 50071 states have (on average 3.4663378003235406) internal successors, (173563), 51320 states have internal predecessors, (173563), 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 18:40:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51321 states to 51321 states and 173563 transitions. [2021-06-24 18:40:16,636 INFO L78 Accepts]: Start accepts. Automaton has 51321 states and 173563 transitions. Word has length 19 [2021-06-24 18:40:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:40:16,636 INFO L482 AbstractCegarLoop]: Abstraction has 51321 states and 173563 transitions. [2021-06-24 18:40:16,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:40:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 51321 states and 173563 transitions. [2021-06-24 18:40:16,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-24 18:40:16,667 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:40:16,667 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:40:16,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-24 18:40:16,667 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:40:16,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:40:16,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1766126509, now seen corresponding path program 1 times [2021-06-24 18:40:16,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:40:16,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968359235] [2021-06-24 18:40:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:40:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:40:16,680 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:16,680 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:40:16,682 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:16,683 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:16,687 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:16,687 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:16,692 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:16,692 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:16,698 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:16,699 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:16,706 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:16,707 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:16,707 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:16,708 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:16,708 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:16,708 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:40:16,711 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:16,711 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:40:16,712 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 18:40:16,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:40:16,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968359235] [2021-06-24 18:40:16,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968359235] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:40:16,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:40:16,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:40:16,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718869801] [2021-06-24 18:40:16,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:40:16,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:40:16,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:40:16,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:40:16,713 INFO L87 Difference]: Start difference. First operand 51321 states and 173563 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:40:17,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:40:17,443 INFO L93 Difference]: Finished difference Result 88819 states and 307890 transitions. [2021-06-24 18:40:17,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:40:17,444 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-24 18:40:17,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:40:17,655 INFO L225 Difference]: With dead ends: 88819 [2021-06-24 18:40:17,656 INFO L226 Difference]: Without dead ends: 67823 [2021-06-24 18:40:17,656 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:40:17,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67823 states. [2021-06-24 18:40:18,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67823 to 41434. [2021-06-24 18:40:18,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41434 states, 40184 states have (on average 3.413273939876568) internal successors, (137159), 41433 states have internal predecessors, (137159), 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 18:40:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41434 states to 41434 states and 137159 transitions. [2021-06-24 18:40:19,047 INFO L78 Accepts]: Start accepts. Automaton has 41434 states and 137159 transitions. Word has length 22 [2021-06-24 18:40:19,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:40:19,047 INFO L482 AbstractCegarLoop]: Abstraction has 41434 states and 137159 transitions. [2021-06-24 18:40:19,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:40:19,047 INFO L276 IsEmpty]: Start isEmpty. Operand 41434 states and 137159 transitions. [2021-06-24 18:40:19,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-24 18:40:19,073 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:40:19,073 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, 1, 1, 1, 1, 1] [2021-06-24 18:40:19,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-24 18:40:19,073 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:40:19,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:40:19,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1966356521, now seen corresponding path program 1 times [2021-06-24 18:40:19,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:40:19,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634052559] [2021-06-24 18:40:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:40:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:40:19,094 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:19,094 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:40:19,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:19,097 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:19,101 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:19,102 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:19,107 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:19,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:19,113 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:19,114 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:19,120 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:19,123 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:19,138 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:19,139 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:19,139 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:19,140 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:19,140 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:19,141 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:19,141 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:19,141 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:40:19,144 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:19,145 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:40:19,145 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 18:40:19,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:40:19,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634052559] [2021-06-24 18:40:19,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634052559] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:40:19,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:40:19,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 18:40:19,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106426475] [2021-06-24 18:40:19,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 18:40:19,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:40:19,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 18:40:19,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:40:19,146 INFO L87 Difference]: Start difference. First operand 41434 states and 137159 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 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 18:40:19,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:40:19,513 INFO L93 Difference]: Finished difference Result 57313 states and 193374 transitions. [2021-06-24 18:40:19,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 18:40:19,513 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 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 25 [2021-06-24 18:40:19,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:40:19,580 INFO L225 Difference]: With dead ends: 57313 [2021-06-24 18:40:19,580 INFO L226 Difference]: Without dead ends: 26873 [2021-06-24 18:40:19,580 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:40:19,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26873 states. [2021-06-24 18:40:20,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26873 to 16290. [2021-06-24 18:40:20,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16290 states, 15040 states have (on average 3.0424867021276594) internal successors, (45759), 16289 states have internal predecessors, (45759), 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 18:40:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16290 states to 16290 states and 45759 transitions. [2021-06-24 18:40:20,130 INFO L78 Accepts]: Start accepts. Automaton has 16290 states and 45759 transitions. Word has length 25 [2021-06-24 18:40:20,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:40:20,130 INFO L482 AbstractCegarLoop]: Abstraction has 16290 states and 45759 transitions. [2021-06-24 18:40:20,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 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 18:40:20,130 INFO L276 IsEmpty]: Start isEmpty. Operand 16290 states and 45759 transitions. [2021-06-24 18:40:20,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-24 18:40:20,137 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:40:20,138 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:40:20,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-24 18:40:20,138 INFO L430 AbstractCegarLoop]: === Iteration 7 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:40:20,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:40:20,138 INFO L82 PathProgramCache]: Analyzing trace with hash 657081411, now seen corresponding path program 1 times [2021-06-24 18:40:20,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:40:20,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312963722] [2021-06-24 18:40:20,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:40:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:40:20,154 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:20,154 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:40:20,162 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:20,163 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:20,167 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:20,167 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:20,172 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:20,174 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:20,180 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:20,180 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:20,187 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:20,187 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:20,195 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:20,195 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:20,204 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:20,205 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:20,205 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:20,206 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:20,206 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:20,206 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:20,207 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:20,207 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:20,207 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:20,207 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:40:20,210 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:20,210 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:40:20,211 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 18:40:20,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:40:20,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312963722] [2021-06-24 18:40:20,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312963722] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:40:20,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:40:20,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-24 18:40:20,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851932541] [2021-06-24 18:40:20,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-24 18:40:20,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:40:20,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-24 18:40:20,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 18:40:20,212 INFO L87 Difference]: Start difference. First operand 16290 states and 45759 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 18:40:20,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:40:20,371 INFO L93 Difference]: Finished difference Result 12766 states and 42235 transitions. [2021-06-24 18:40:20,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-24 18:40:20,372 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 28 [2021-06-24 18:40:20,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:40:20,372 INFO L225 Difference]: With dead ends: 12766 [2021-06-24 18:40:20,372 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 18:40:20,372 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 18:40:20,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 18:40:20,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 18:40:20,372 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 18:40:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 18:40:20,373 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-06-24 18:40:20,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:40:20,373 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 18:40:20,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 18:40:20,373 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 18:40:20,373 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 18:40:20,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-24 18:40:20,373 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork5 was SAFE (3/6) [2021-06-24 18:40:20,374 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:40:20,374 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:40:20,374 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:40:20,374 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:40:20,375 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:40:20,375 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:40:20,375 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:40:20,375 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:40:20,375 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork2======== [2021-06-24 18:40:34,176 INFO L276 IsEmpty]: Start isEmpty. Operand has 248047 states, 234047 states have (on average 4.142185116664602) internal successors, (969466), 248046 states have internal predecessors, (969466), 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 18:40:34,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-24 18:40:34,177 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:40:34,177 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:40:34,177 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:40:34,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:40:34,177 INFO L82 PathProgramCache]: Analyzing trace with hash -930424517, now seen corresponding path program 1 times [2021-06-24 18:40:34,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:40:34,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188451631] [2021-06-24 18:40:34,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:40:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:40:34,225 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:34,226 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:40:34,226 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:34,226 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:40:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:40:34,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:40:34,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188451631] [2021-06-24 18:40:34,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188451631] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:40:34,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:40:34,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:40:34,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545960114] [2021-06-24 18:40:34,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:40:34,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:40:34,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:40:34,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:40:34,486 INFO L87 Difference]: Start difference. First operand has 248047 states, 234047 states have (on average 4.142185116664602) internal successors, (969466), 248046 states have internal predecessors, (969466), 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 18:40:35,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:40:35,868 INFO L93 Difference]: Finished difference Result 168115 states and 572891 transitions. [2021-06-24 18:40:35,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:40:35,869 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 18:40:35,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:40:36,246 INFO L225 Difference]: With dead ends: 168115 [2021-06-24 18:40:36,246 INFO L226 Difference]: Without dead ends: 98615 [2021-06-24 18:40:36,246 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 18:40:37,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98615 states. [2021-06-24 18:40:38,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98615 to 96595. [2021-06-24 18:40:38,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96595 states, 94655 states have (on average 3.5265754582430935) internal successors, (333808), 96594 states have internal predecessors, (333808), 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 18:40:39,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96595 states to 96595 states and 333808 transitions. [2021-06-24 18:40:39,346 INFO L78 Accepts]: Start accepts. Automaton has 96595 states and 333808 transitions. Word has length 9 [2021-06-24 18:40:39,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:40:39,346 INFO L482 AbstractCegarLoop]: Abstraction has 96595 states and 333808 transitions. [2021-06-24 18:40:39,346 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 18:40:39,346 INFO L276 IsEmpty]: Start isEmpty. Operand 96595 states and 333808 transitions. [2021-06-24 18:40:39,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-24 18:40:39,347 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:40:39,347 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:40:39,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-24 18:40:39,347 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:40:39,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:40:39,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1771704633, now seen corresponding path program 1 times [2021-06-24 18:40:39,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:40:39,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731965540] [2021-06-24 18:40:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:40:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:40:39,353 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:39,354 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:40:39,356 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:39,356 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:39,360 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:39,361 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:39,366 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:39,366 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:40:39,369 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:39,369 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:40:39,372 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 18:40:39,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:40:39,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731965540] [2021-06-24 18:40:39,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731965540] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:40:39,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:40:39,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:40:39,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314197286] [2021-06-24 18:40:39,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:40:39,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:40:39,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:40:39,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:40:39,373 INFO L87 Difference]: Start difference. First operand 96595 states and 333808 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 18:40:40,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:40:40,604 INFO L93 Difference]: Finished difference Result 159717 states and 563551 transitions. [2021-06-24 18:40:40,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:40:40,605 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 18:40:40,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:40:41,395 INFO L225 Difference]: With dead ends: 159717 [2021-06-24 18:40:41,395 INFO L226 Difference]: Without dead ends: 158436 [2021-06-24 18:40:41,396 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:40:42,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158436 states. [2021-06-24 18:40:44,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158436 to 150564. [2021-06-24 18:40:45,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150564 states, 148624 states have (on average 3.6413432554634513) internal successors, (541191), 150563 states have internal predecessors, (541191), 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 18:40:45,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150564 states to 150564 states and 541191 transitions. [2021-06-24 18:40:45,639 INFO L78 Accepts]: Start accepts. Automaton has 150564 states and 541191 transitions. Word has length 13 [2021-06-24 18:40:45,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:40:45,639 INFO L482 AbstractCegarLoop]: Abstraction has 150564 states and 541191 transitions. [2021-06-24 18:40:45,639 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 18:40:45,639 INFO L276 IsEmpty]: Start isEmpty. Operand 150564 states and 541191 transitions. [2021-06-24 18:40:45,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-24 18:40:45,641 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:40:45,641 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:40:45,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-24 18:40:45,641 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:40:45,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:40:45,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1777577981, now seen corresponding path program 2 times [2021-06-24 18:40:45,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:40:45,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993188521] [2021-06-24 18:40:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:40:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:40:45,646 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:45,646 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:40:45,646 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:45,647 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:40:45,649 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:45,649 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:40:45,649 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 18:40:45,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:40:45,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993188521] [2021-06-24 18:40:45,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993188521] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:40:45,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:40:45,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:40:45,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598354853] [2021-06-24 18:40:45,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:40:45,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:40:45,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:40:45,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:40:45,650 INFO L87 Difference]: Start difference. First operand 150564 states and 541191 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 18:40:46,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:40:46,226 INFO L93 Difference]: Finished difference Result 47066 states and 153839 transitions. [2021-06-24 18:40:46,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:40:46,227 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 18:40:46,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:40:46,327 INFO L225 Difference]: With dead ends: 47066 [2021-06-24 18:40:46,328 INFO L226 Difference]: Without dead ends: 37807 [2021-06-24 18:40:46,328 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:40:46,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37807 states. [2021-06-24 18:40:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37807 to 37182. [2021-06-24 18:40:47,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37182 states, 35682 states have (on average 3.335042878762401) internal successors, (119001), 37181 states have internal predecessors, (119001), 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 18:40:47,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37182 states to 37182 states and 119001 transitions. [2021-06-24 18:40:47,183 INFO L78 Accepts]: Start accepts. Automaton has 37182 states and 119001 transitions. Word has length 13 [2021-06-24 18:40:47,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:40:47,183 INFO L482 AbstractCegarLoop]: Abstraction has 37182 states and 119001 transitions. [2021-06-24 18:40:47,184 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 18:40:47,184 INFO L276 IsEmpty]: Start isEmpty. Operand 37182 states and 119001 transitions. [2021-06-24 18:40:47,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-24 18:40:47,188 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:40:47,188 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:40:47,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-24 18:40:47,188 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:40:47,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:40:47,188 INFO L82 PathProgramCache]: Analyzing trace with hash -2026337909, now seen corresponding path program 1 times [2021-06-24 18:40:47,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:40:47,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043100190] [2021-06-24 18:40:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:40:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:40:47,205 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:47,205 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:40:47,207 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:47,209 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:47,214 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:47,215 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:47,220 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:47,220 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:47,226 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:47,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:47,227 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:47,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:40:47,230 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:47,230 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:40:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:40:47,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:40:47,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043100190] [2021-06-24 18:40:47,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043100190] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:40:47,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:40:47,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:40:47,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016330646] [2021-06-24 18:40:47,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:40:47,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:40:47,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:40:47,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:40:47,231 INFO L87 Difference]: Start difference. First operand 37182 states and 119001 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 18:40:47,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:40:47,795 INFO L93 Difference]: Finished difference Result 69380 states and 229751 transitions. [2021-06-24 18:40:47,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:40:47,796 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 18:40:47,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:40:47,977 INFO L225 Difference]: With dead ends: 69380 [2021-06-24 18:40:47,977 INFO L226 Difference]: Without dead ends: 64828 [2021-06-24 18:40:47,977 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:40:48,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64828 states. [2021-06-24 18:40:49,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64828 to 45548. [2021-06-24 18:40:49,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45548 states, 44048 states have (on average 3.3668952052306573) internal successors, (148305), 45547 states have internal predecessors, (148305), 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 18:40:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45548 states to 45548 states and 148305 transitions. [2021-06-24 18:40:49,417 INFO L78 Accepts]: Start accepts. Automaton has 45548 states and 148305 transitions. Word has length 16 [2021-06-24 18:40:49,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:40:49,417 INFO L482 AbstractCegarLoop]: Abstraction has 45548 states and 148305 transitions. [2021-06-24 18:40:49,417 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 18:40:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 45548 states and 148305 transitions. [2021-06-24 18:40:49,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-24 18:40:49,437 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:40:49,437 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 18:40:49,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-24 18:40:49,437 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:40:49,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:40:49,437 INFO L82 PathProgramCache]: Analyzing trace with hash 43732375, now seen corresponding path program 1 times [2021-06-24 18:40:49,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:40:49,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717134799] [2021-06-24 18:40:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:40:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:40:49,451 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:49,451 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:40:49,456 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:49,457 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:49,461 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:49,461 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:49,466 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:49,468 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:49,474 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:49,474 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:49,480 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:49,481 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:49,481 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:49,481 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:49,482 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:49,482 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:40:49,485 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:49,486 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:40:49,486 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 18:40:49,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:40:49,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717134799] [2021-06-24 18:40:49,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717134799] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:40:49,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:40:49,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:40:49,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092563205] [2021-06-24 18:40:49,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:40:49,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:40:49,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:40:49,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:40:49,487 INFO L87 Difference]: Start difference. First operand 45548 states and 148305 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 18:40:50,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:40:50,142 INFO L93 Difference]: Finished difference Result 78074 states and 263525 transitions. [2021-06-24 18:40:50,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:40:50,153 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 18:40:50,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:40:50,318 INFO L225 Difference]: With dead ends: 78074 [2021-06-24 18:40:50,318 INFO L226 Difference]: Without dead ends: 61867 [2021-06-24 18:40:50,318 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:40:50,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61867 states. [2021-06-24 18:40:51,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61867 to 38357. [2021-06-24 18:40:51,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38357 states, 36857 states have (on average 3.296497273245245) internal successors, (121499), 38356 states have internal predecessors, (121499), 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 18:40:51,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38357 states to 38357 states and 121499 transitions. [2021-06-24 18:40:51,376 INFO L78 Accepts]: Start accepts. Automaton has 38357 states and 121499 transitions. Word has length 20 [2021-06-24 18:40:51,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:40:51,377 INFO L482 AbstractCegarLoop]: Abstraction has 38357 states and 121499 transitions. [2021-06-24 18:40:51,377 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 18:40:51,377 INFO L276 IsEmpty]: Start isEmpty. Operand 38357 states and 121499 transitions. [2021-06-24 18:40:51,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-24 18:40:51,398 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:40:51,398 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, 1, 1, 1, 1] [2021-06-24 18:40:51,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-24 18:40:51,398 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:40:51,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:40:51,399 INFO L82 PathProgramCache]: Analyzing trace with hash -647683300, now seen corresponding path program 1 times [2021-06-24 18:40:51,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:40:51,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91790371] [2021-06-24 18:40:51,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:40:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:40:51,417 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:51,417 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:40:51,419 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:51,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:51,424 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:51,425 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:51,430 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:51,430 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:51,436 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:51,436 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:51,442 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:51,443 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:51,450 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:51,450 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:51,450 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:51,451 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:51,451 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:51,451 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:51,452 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:51,452 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:40:51,455 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:51,456 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:40:51,456 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 18:40:51,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:40:51,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91790371] [2021-06-24 18:40:51,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91790371] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:40:51,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:40:51,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 18:40:51,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085153840] [2021-06-24 18:40:51,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 18:40:51,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:40:51,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 18:40:51,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:40:51,457 INFO L87 Difference]: Start difference. First operand 38357 states and 121499 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 18:40:52,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:40:52,002 INFO L93 Difference]: Finished difference Result 53023 states and 176023 transitions. [2021-06-24 18:40:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 18:40:52,003 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 24 [2021-06-24 18:40:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:40:52,067 INFO L225 Difference]: With dead ends: 53023 [2021-06-24 18:40:52,067 INFO L226 Difference]: Without dead ends: 26378 [2021-06-24 18:40:52,067 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:40:52,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26378 states. [2021-06-24 18:40:52,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26378 to 16320. [2021-06-24 18:40:52,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16320 states, 15070 states have (on average 3.0226277372262773) internal successors, (45551), 16319 states have internal predecessors, (45551), 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 18:40:52,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16320 states to 16320 states and 45551 transitions. [2021-06-24 18:40:52,448 INFO L78 Accepts]: Start accepts. Automaton has 16320 states and 45551 transitions. Word has length 24 [2021-06-24 18:40:52,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:40:52,448 INFO L482 AbstractCegarLoop]: Abstraction has 16320 states and 45551 transitions. [2021-06-24 18:40:52,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 18:40:52,448 INFO L276 IsEmpty]: Start isEmpty. Operand 16320 states and 45551 transitions. [2021-06-24 18:40:52,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-24 18:40:52,657 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:40:52,657 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:40:52,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-24 18:40:52,657 INFO L430 AbstractCegarLoop]: === Iteration 7 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:40:52,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:40:52,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1722226504, now seen corresponding path program 1 times [2021-06-24 18:40:52,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:40:52,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517354192] [2021-06-24 18:40:52,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:40:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:40:52,676 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:52,677 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:40:52,679 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:52,679 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:52,684 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:52,684 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:52,692 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:52,692 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:52,699 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:52,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:52,707 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:52,708 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:52,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:52,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:52,725 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:52,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:52,725 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:52,726 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:52,726 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:52,726 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:52,727 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:52,727 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:40:52,727 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:52,728 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:40:52,730 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:40:52,731 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:40:52,731 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 18:40:52,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:40:52,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517354192] [2021-06-24 18:40:52,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517354192] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:40:52,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:40:52,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-24 18:40:52,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710409704] [2021-06-24 18:40:52,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-24 18:40:52,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:40:52,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-24 18:40:52,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 18:40:52,732 INFO L87 Difference]: Start difference. First operand 16320 states and 45551 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 18:40:52,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:40:52,880 INFO L93 Difference]: Finished difference Result 12796 states and 42027 transitions. [2021-06-24 18:40:52,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-24 18:40:52,880 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 28 [2021-06-24 18:40:52,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:40:52,880 INFO L225 Difference]: With dead ends: 12796 [2021-06-24 18:40:52,880 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 18:40:52,881 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 18:40:52,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 18:40:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 18:40:52,881 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 18:40:52,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 18:40:52,881 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-06-24 18:40:52,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:40:52,881 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 18:40:52,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 18:40:52,881 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 18:40:52,881 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 18:40:52,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-24 18:40:52,881 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork2 was SAFE (4/6) [2021-06-24 18:40:52,881 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:40:52,882 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:40:52,882 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:40:52,882 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:40:52,882 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:40:52,882 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:40:52,882 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:40:52,882 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:40:52,882 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork3======== [2021-06-24 18:41:06,509 INFO L276 IsEmpty]: Start isEmpty. Operand has 248580 states, 234580 states have (on average 4.140838946201722) internal successors, (971358), 248579 states have internal predecessors, (971358), 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 18:41:06,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-24 18:41:06,510 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:41:06,510 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:41:06,510 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:41:06,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:41:06,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1221636242, now seen corresponding path program 1 times [2021-06-24 18:41:06,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:41:06,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581782150] [2021-06-24 18:41:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:41:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:41:06,528 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:06,528 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:41:06,528 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:06,528 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:41:06,546 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 18:41:06,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:41:06,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581782150] [2021-06-24 18:41:06,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581782150] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:41:06,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:41:06,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:41:06,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674633029] [2021-06-24 18:41:06,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:41:06,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:41:06,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:41:06,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:41:06,797 INFO L87 Difference]: Start difference. First operand has 248580 states, 234580 states have (on average 4.140838946201722) internal successors, (971358), 248579 states have internal predecessors, (971358), 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 18:41:08,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:41:08,174 INFO L93 Difference]: Finished difference Result 168566 states and 574303 transitions. [2021-06-24 18:41:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:41:08,175 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 18:41:08,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:41:08,537 INFO L225 Difference]: With dead ends: 168566 [2021-06-24 18:41:08,537 INFO L226 Difference]: Without dead ends: 98889 [2021-06-24 18:41:08,537 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:41:09,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98889 states. [2021-06-24 18:41:11,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98889 to 96876. [2021-06-24 18:41:11,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96876 states, 94936 states have (on average 3.525764725709952) internal successors, (334722), 96875 states have internal predecessors, (334722), 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 18:41:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96876 states to 96876 states and 334722 transitions. [2021-06-24 18:41:11,595 INFO L78 Accepts]: Start accepts. Automaton has 96876 states and 334722 transitions. Word has length 10 [2021-06-24 18:41:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:41:11,595 INFO L482 AbstractCegarLoop]: Abstraction has 96876 states and 334722 transitions. [2021-06-24 18:41:11,595 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 18:41:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 96876 states and 334722 transitions. [2021-06-24 18:41:11,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-24 18:41:11,598 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:41:11,598 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:41:11,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-24 18:41:11,598 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:41:11,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:41:11,598 INFO L82 PathProgramCache]: Analyzing trace with hash 429911952, now seen corresponding path program 1 times [2021-06-24 18:41:11,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:41:11,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368871750] [2021-06-24 18:41:11,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:41:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:41:11,608 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:11,609 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:41:11,611 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:11,611 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:11,616 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:11,616 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:11,621 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:11,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:41:11,624 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:11,624 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:41:11,624 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 18:41:11,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:41:11,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368871750] [2021-06-24 18:41:11,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368871750] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:41:11,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:41:11,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:41:11,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328513327] [2021-06-24 18:41:11,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:41:11,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:41:11,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:41:11,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:41:11,625 INFO L87 Difference]: Start difference. First operand 96876 states and 334722 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 18:41:12,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:41:12,884 INFO L93 Difference]: Finished difference Result 160104 states and 564920 transitions. [2021-06-24 18:41:12,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:41:12,884 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 18:41:12,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:41:13,733 INFO L225 Difference]: With dead ends: 160104 [2021-06-24 18:41:13,733 INFO L226 Difference]: Without dead ends: 158823 [2021-06-24 18:41:13,733 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:41:14,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158823 states. [2021-06-24 18:41:16,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158823 to 150965. [2021-06-24 18:41:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150965 states, 149025 states have (on average 3.640885757423251) internal successors, (542583), 150964 states have internal predecessors, (542583), 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 18:41:18,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150965 states to 150965 states and 542583 transitions. [2021-06-24 18:41:18,143 INFO L78 Accepts]: Start accepts. Automaton has 150965 states and 542583 transitions. Word has length 14 [2021-06-24 18:41:18,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:41:18,143 INFO L482 AbstractCegarLoop]: Abstraction has 150965 states and 542583 transitions. [2021-06-24 18:41:18,143 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 18:41:18,143 INFO L276 IsEmpty]: Start isEmpty. Operand 150965 states and 542583 transitions. [2021-06-24 18:41:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-24 18:41:18,146 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:41:18,146 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:41:18,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-24 18:41:18,147 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:41:18,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:41:18,147 INFO L82 PathProgramCache]: Analyzing trace with hash -729632240, now seen corresponding path program 2 times [2021-06-24 18:41:18,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:41:18,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101582808] [2021-06-24 18:41:18,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:41:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:41:18,152 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:18,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:41:18,153 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:18,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:41:18,155 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:18,155 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:41:18,155 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 18:41:18,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:41:18,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101582808] [2021-06-24 18:41:18,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101582808] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:41:18,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:41:18,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:41:18,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396643165] [2021-06-24 18:41:18,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:41:18,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:41:18,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:41:18,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:41:18,156 INFO L87 Difference]: Start difference. First operand 150965 states and 542583 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 18:41:18,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:41:18,763 INFO L93 Difference]: Finished difference Result 47214 states and 154288 transitions. [2021-06-24 18:41:18,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:41:18,763 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 18:41:18,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:41:18,871 INFO L225 Difference]: With dead ends: 47214 [2021-06-24 18:41:18,872 INFO L226 Difference]: Without dead ends: 37878 [2021-06-24 18:41:18,872 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:41:19,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37878 states. [2021-06-24 18:41:19,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37878 to 37258. [2021-06-24 18:41:19,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37258 states, 35758 states have (on average 3.3362883830191845) internal successors, (119299), 37257 states have internal predecessors, (119299), 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 18:41:19,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37258 states to 37258 states and 119299 transitions. [2021-06-24 18:41:19,736 INFO L78 Accepts]: Start accepts. Automaton has 37258 states and 119299 transitions. Word has length 14 [2021-06-24 18:41:19,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:41:19,736 INFO L482 AbstractCegarLoop]: Abstraction has 37258 states and 119299 transitions. [2021-06-24 18:41:19,736 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 18:41:19,736 INFO L276 IsEmpty]: Start isEmpty. Operand 37258 states and 119299 transitions. [2021-06-24 18:41:19,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-24 18:41:19,741 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:41:19,741 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 18:41:19,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-24 18:41:19,741 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:41:19,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:41:19,741 INFO L82 PathProgramCache]: Analyzing trace with hash 635465544, now seen corresponding path program 1 times [2021-06-24 18:41:19,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:41:19,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142864658] [2021-06-24 18:41:19,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:41:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:41:19,751 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:19,751 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:41:19,753 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:19,754 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:19,757 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:19,758 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:19,762 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:19,763 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:19,768 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:19,771 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:19,771 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:19,771 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:41:19,775 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:19,775 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:41:19,775 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 18:41:19,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:41:19,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142864658] [2021-06-24 18:41:19,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142864658] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:41:19,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:41:19,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:41:19,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263612946] [2021-06-24 18:41:19,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:41:19,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:41:19,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:41:19,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:41:19,776 INFO L87 Difference]: Start difference. First operand 37258 states and 119299 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 18:41:20,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:41:20,398 INFO L93 Difference]: Finished difference Result 69489 states and 230100 transitions. [2021-06-24 18:41:20,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:41:20,401 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 18:41:20,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:41:20,595 INFO L225 Difference]: With dead ends: 69489 [2021-06-24 18:41:20,595 INFO L226 Difference]: Without dead ends: 64945 [2021-06-24 18:41:20,595 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:41:20,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64945 states. [2021-06-24 18:41:21,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64945 to 45611. [2021-06-24 18:41:21,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45611 states, 44111 states have (on average 3.366212509351409) internal successors, (148487), 45610 states have internal predecessors, (148487), 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 18:41:22,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45611 states to 45611 states and 148487 transitions. [2021-06-24 18:41:22,043 INFO L78 Accepts]: Start accepts. Automaton has 45611 states and 148487 transitions. Word has length 17 [2021-06-24 18:41:22,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:41:22,043 INFO L482 AbstractCegarLoop]: Abstraction has 45611 states and 148487 transitions. [2021-06-24 18:41:22,043 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 18:41:22,043 INFO L276 IsEmpty]: Start isEmpty. Operand 45611 states and 148487 transitions. [2021-06-24 18:41:22,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-24 18:41:22,062 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:41:22,062 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 18:41:22,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-24 18:41:22,062 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:41:22,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:41:22,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1830046662, now seen corresponding path program 1 times [2021-06-24 18:41:22,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:41:22,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377919055] [2021-06-24 18:41:22,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:41:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:41:22,076 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:22,077 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:41:22,079 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:22,079 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:22,084 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:22,084 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:22,089 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:22,090 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:22,096 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:22,096 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:22,103 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:22,103 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:22,103 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:22,104 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:22,104 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:22,104 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:41:22,107 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:22,107 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:41:22,107 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 18:41:22,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:41:22,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377919055] [2021-06-24 18:41:22,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377919055] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:41:22,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:41:22,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:41:22,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679131713] [2021-06-24 18:41:22,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:41:22,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:41:22,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:41:22,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:41:22,108 INFO L87 Difference]: Start difference. First operand 45611 states and 148487 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 18:41:22,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:41:22,537 INFO L93 Difference]: Finished difference Result 78137 states and 263707 transitions. [2021-06-24 18:41:22,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:41:22,537 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 18:41:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:41:22,705 INFO L225 Difference]: With dead ends: 78137 [2021-06-24 18:41:22,705 INFO L226 Difference]: Without dead ends: 61915 [2021-06-24 18:41:22,705 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:41:23,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61915 states. [2021-06-24 18:41:23,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61915 to 38392. [2021-06-24 18:41:23,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38392 states, 36892 states have (on average 3.296324406375366) internal successors, (121608), 38391 states have internal predecessors, (121608), 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 18:41:23,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38392 states to 38392 states and 121608 transitions. [2021-06-24 18:41:23,928 INFO L78 Accepts]: Start accepts. Automaton has 38392 states and 121608 transitions. Word has length 20 [2021-06-24 18:41:23,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:41:23,929 INFO L482 AbstractCegarLoop]: Abstraction has 38392 states and 121608 transitions. [2021-06-24 18:41:23,929 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 18:41:23,929 INFO L276 IsEmpty]: Start isEmpty. Operand 38392 states and 121608 transitions. [2021-06-24 18:41:23,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-24 18:41:23,950 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:41:23,950 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, 1, 1, 1, 1] [2021-06-24 18:41:23,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-24 18:41:23,950 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:41:23,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:41:23,951 INFO L82 PathProgramCache]: Analyzing trace with hash 628576715, now seen corresponding path program 1 times [2021-06-24 18:41:23,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:41:23,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182093986] [2021-06-24 18:41:23,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:41:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:41:23,965 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:23,965 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:41:23,967 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:23,967 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:23,972 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:23,972 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:23,979 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:23,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:23,985 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:23,985 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:23,992 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:23,992 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:23,999 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:24,000 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:24,000 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:24,000 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:24,001 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:24,001 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:24,001 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:24,001 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:41:24,005 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:24,005 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:41:24,005 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 18:41:24,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:41:24,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182093986] [2021-06-24 18:41:24,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182093986] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:41:24,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:41:24,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 18:41:24,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113526689] [2021-06-24 18:41:24,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 18:41:24,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:41:24,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 18:41:24,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:41:24,006 INFO L87 Difference]: Start difference. First operand 38392 states and 121608 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 18:41:24,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:41:24,327 INFO L93 Difference]: Finished difference Result 53058 states and 176132 transitions. [2021-06-24 18:41:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 18:41:24,327 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 24 [2021-06-24 18:41:24,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:41:24,602 INFO L225 Difference]: With dead ends: 53058 [2021-06-24 18:41:24,603 INFO L226 Difference]: Without dead ends: 26386 [2021-06-24 18:41:24,603 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:41:24,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26386 states. [2021-06-24 18:41:24,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26386 to 16318. [2021-06-24 18:41:24,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16318 states, 15068 states have (on average 3.023228032917441) internal successors, (45554), 16317 states have internal predecessors, (45554), 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 18:41:24,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16318 states to 16318 states and 45554 transitions. [2021-06-24 18:41:24,993 INFO L78 Accepts]: Start accepts. Automaton has 16318 states and 45554 transitions. Word has length 24 [2021-06-24 18:41:24,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:41:24,994 INFO L482 AbstractCegarLoop]: Abstraction has 16318 states and 45554 transitions. [2021-06-24 18:41:24,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 18:41:24,994 INFO L276 IsEmpty]: Start isEmpty. Operand 16318 states and 45554 transitions. [2021-06-24 18:41:25,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-24 18:41:25,001 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:41:25,001 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:41:25,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-24 18:41:25,001 INFO L430 AbstractCegarLoop]: === Iteration 7 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:41:25,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:41:25,002 INFO L82 PathProgramCache]: Analyzing trace with hash -34076697, now seen corresponding path program 1 times [2021-06-24 18:41:25,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:41:25,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310307542] [2021-06-24 18:41:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:41:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:41:25,019 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:25,019 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:41:25,021 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:25,022 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:25,026 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:25,026 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:25,031 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:25,031 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:25,036 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:25,038 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:25,049 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:25,049 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:25,057 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:25,058 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:25,065 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:25,066 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:25,066 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:25,067 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:25,067 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:25,067 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:25,068 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:25,068 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:25,068 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:25,068 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:41:25,072 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:25,072 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:41:25,072 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 18:41:25,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:41:25,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310307542] [2021-06-24 18:41:25,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310307542] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:41:25,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:41:25,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-24 18:41:25,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266509782] [2021-06-24 18:41:25,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-24 18:41:25,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:41:25,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-24 18:41:25,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 18:41:25,073 INFO L87 Difference]: Start difference. First operand 16318 states and 45554 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 18:41:25,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:41:25,223 INFO L93 Difference]: Finished difference Result 12794 states and 42030 transitions. [2021-06-24 18:41:25,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-24 18:41:25,223 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 28 [2021-06-24 18:41:25,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:41:25,223 INFO L225 Difference]: With dead ends: 12794 [2021-06-24 18:41:25,223 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 18:41:25,224 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 18:41:25,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 18:41:25,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 18:41:25,224 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 18:41:25,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 18:41:25,224 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-06-24 18:41:25,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:41:25,224 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 18:41:25,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 18:41:25,224 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 18:41:25,224 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 18:41:25,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-24 18:41:25,224 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork3 was SAFE (5/6) [2021-06-24 18:41:25,225 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:41:25,225 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:41:25,225 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:41:25,225 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:41:25,225 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:41:25,225 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:41:25,225 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:41:25,225 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:41:25,225 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork1======== [2021-06-24 18:41:39,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 247405 states, 233405 states have (on average 4.143514491977464) internal successors, (967117), 247404 states have internal predecessors, (967117), 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 18:41:39,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-24 18:41:39,627 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:41:39,627 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:41:39,627 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:41:39,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:41:39,628 INFO L82 PathProgramCache]: Analyzing trace with hash -307108784, now seen corresponding path program 1 times [2021-06-24 18:41:39,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:41:39,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335960730] [2021-06-24 18:41:39,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:41:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:41:39,651 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:39,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:41:39,651 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:39,652 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:41:39,654 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 18:41:39,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:41:39,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335960730] [2021-06-24 18:41:39,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335960730] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:41:39,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:41:39,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:41:39,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126380388] [2021-06-24 18:41:39,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:41:39,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:41:39,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:41:39,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:41:39,915 INFO L87 Difference]: Start difference. First operand has 247405 states, 233405 states have (on average 4.143514491977464) internal successors, (967117), 247404 states have internal predecessors, (967117), 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 18:41:41,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:41:41,301 INFO L93 Difference]: Finished difference Result 167529 states and 571115 transitions. [2021-06-24 18:41:41,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:41:41,301 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 18:41:41,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:41:41,638 INFO L225 Difference]: With dead ends: 167529 [2021-06-24 18:41:41,638 INFO L226 Difference]: Without dead ends: 98287 [2021-06-24 18:41:41,638 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 18:41:42,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98287 states. [2021-06-24 18:41:44,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98287 to 96264. [2021-06-24 18:41:44,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96264 states, 94324 states have (on average 3.527416140112803) internal successors, (332720), 96263 states have internal predecessors, (332720), 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 18:41:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96264 states to 96264 states and 332720 transitions. [2021-06-24 18:41:44,542 INFO L78 Accepts]: Start accepts. Automaton has 96264 states and 332720 transitions. Word has length 8 [2021-06-24 18:41:44,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:41:44,542 INFO L482 AbstractCegarLoop]: Abstraction has 96264 states and 332720 transitions. [2021-06-24 18:41:44,543 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 18:41:44,543 INFO L276 IsEmpty]: Start isEmpty. Operand 96264 states and 332720 transitions. [2021-06-24 18:41:44,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-24 18:41:44,544 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:41:44,544 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:41:44,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-24 18:41:44,544 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:41:44,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:41:44,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1054777038, now seen corresponding path program 1 times [2021-06-24 18:41:44,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:41:44,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942697720] [2021-06-24 18:41:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:41:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:41:44,556 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:44,559 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:41:44,561 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:44,562 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:44,566 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:44,566 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:44,571 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:44,572 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:41:44,574 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:44,575 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:41:44,575 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 18:41:44,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:41:44,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942697720] [2021-06-24 18:41:44,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942697720] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:41:44,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:41:44,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:41:44,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479495711] [2021-06-24 18:41:44,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:41:44,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:41:44,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:41:44,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:41:44,576 INFO L87 Difference]: Start difference. First operand 96264 states and 332720 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 18:41:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:41:46,088 INFO L93 Difference]: Finished difference Result 159249 states and 561905 transitions. [2021-06-24 18:41:46,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:41:46,089 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 18:41:46,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:41:46,632 INFO L225 Difference]: With dead ends: 159249 [2021-06-24 18:41:46,632 INFO L226 Difference]: Without dead ends: 157968 [2021-06-24 18:41:46,633 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:41:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157968 states. [2021-06-24 18:41:50,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157968 to 150085. [2021-06-24 18:41:50,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150085 states, 148145 states have (on average 3.641884640048601) internal successors, (539527), 150084 states have internal predecessors, (539527), 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 18:41:51,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150085 states to 150085 states and 539527 transitions. [2021-06-24 18:41:51,314 INFO L78 Accepts]: Start accepts. Automaton has 150085 states and 539527 transitions. Word has length 12 [2021-06-24 18:41:51,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:41:51,314 INFO L482 AbstractCegarLoop]: Abstraction has 150085 states and 539527 transitions. [2021-06-24 18:41:51,314 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 18:41:51,314 INFO L276 IsEmpty]: Start isEmpty. Operand 150085 states and 539527 transitions. [2021-06-24 18:41:51,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-24 18:41:51,315 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:41:51,315 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:41:51,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-24 18:41:51,315 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:41:51,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:41:51,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1605227186, now seen corresponding path program 2 times [2021-06-24 18:41:51,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:41:51,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212727420] [2021-06-24 18:41:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:41:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:41:51,332 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:51,333 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:41:51,333 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:51,333 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:41:51,336 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:51,336 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:41:51,336 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 18:41:51,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:41:51,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212727420] [2021-06-24 18:41:51,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212727420] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:41:51,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:41:51,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:41:51,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919970534] [2021-06-24 18:41:51,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:41:51,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:41:51,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:41:51,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:41:51,337 INFO L87 Difference]: Start difference. First operand 150085 states and 539527 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 18:41:51,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:41:51,540 INFO L93 Difference]: Finished difference Result 46904 states and 153232 transitions. [2021-06-24 18:41:51,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:41:51,541 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 18:41:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:41:51,641 INFO L225 Difference]: With dead ends: 46904 [2021-06-24 18:41:51,641 INFO L226 Difference]: Without dead ends: 37657 [2021-06-24 18:41:51,641 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:41:52,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37657 states. [2021-06-24 18:41:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37657 to 37018. [2021-06-24 18:41:52,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37018 states, 35518 states have (on average 3.3365335886029617) internal successors, (118507), 37017 states have internal predecessors, (118507), 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 18:41:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37018 states to 37018 states and 118507 transitions. [2021-06-24 18:41:52,837 INFO L78 Accepts]: Start accepts. Automaton has 37018 states and 118507 transitions. Word has length 12 [2021-06-24 18:41:52,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:41:52,838 INFO L482 AbstractCegarLoop]: Abstraction has 37018 states and 118507 transitions. [2021-06-24 18:41:52,838 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 18:41:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 37018 states and 118507 transitions. [2021-06-24 18:41:52,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-24 18:41:52,841 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:41:52,841 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:41:52,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-24 18:41:52,842 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:41:52,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:41:52,842 INFO L82 PathProgramCache]: Analyzing trace with hash 369985797, now seen corresponding path program 1 times [2021-06-24 18:41:52,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:41:52,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110565504] [2021-06-24 18:41:52,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:41:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:41:52,848 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:52,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:41:52,850 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:52,850 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:52,854 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:52,855 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:52,859 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:52,860 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:52,865 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:52,865 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:52,866 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:52,866 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:41:52,868 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:52,869 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:41:52,869 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 18:41:52,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:41:52,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110565504] [2021-06-24 18:41:52,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110565504] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:41:52,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:41:52,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:41:52,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250625665] [2021-06-24 18:41:52,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:41:52,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:41:52,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:41:52,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:41:52,870 INFO L87 Difference]: Start difference. First operand 37018 states and 118507 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 18:41:53,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:41:53,241 INFO L93 Difference]: Finished difference Result 69204 states and 229219 transitions. [2021-06-24 18:41:53,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:41:53,241 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 18:41:53,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:41:53,424 INFO L225 Difference]: With dead ends: 69204 [2021-06-24 18:41:53,424 INFO L226 Difference]: Without dead ends: 64652 [2021-06-24 18:41:53,424 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:41:53,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64652 states. [2021-06-24 18:41:54,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64652 to 45454. [2021-06-24 18:41:54,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45454 states, 43954 states have (on average 3.3679756108659054) internal successors, (148036), 45453 states have internal predecessors, (148036), 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 18:41:54,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45454 states to 45454 states and 148036 transitions. [2021-06-24 18:41:54,723 INFO L78 Accepts]: Start accepts. Automaton has 45454 states and 148036 transitions. Word has length 16 [2021-06-24 18:41:54,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:41:54,723 INFO L482 AbstractCegarLoop]: Abstraction has 45454 states and 148036 transitions. [2021-06-24 18:41:54,723 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 18:41:54,723 INFO L276 IsEmpty]: Start isEmpty. Operand 45454 states and 148036 transitions. [2021-06-24 18:41:54,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-24 18:41:54,740 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:41:54,740 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 18:41:54,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-24 18:41:54,741 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:41:54,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:41:54,741 INFO L82 PathProgramCache]: Analyzing trace with hash -991013265, now seen corresponding path program 1 times [2021-06-24 18:41:54,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:41:54,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551387672] [2021-06-24 18:41:54,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:41:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:41:54,751 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:54,752 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:41:54,754 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:54,754 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:54,758 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:54,761 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:54,766 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:54,766 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:54,772 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:54,773 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:54,779 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:54,779 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:54,780 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:54,780 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:54,780 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:54,780 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:41:54,783 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:54,783 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:41:54,783 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 18:41:54,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:41:54,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551387672] [2021-06-24 18:41:54,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551387672] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:41:54,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:41:54,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:41:54,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418981992] [2021-06-24 18:41:54,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:41:54,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:41:54,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:41:54,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:41:54,784 INFO L87 Difference]: Start difference. First operand 45454 states and 148036 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 18:41:55,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:41:55,479 INFO L93 Difference]: Finished difference Result 77980 states and 263256 transitions. [2021-06-24 18:41:55,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:41:55,480 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 18:41:55,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:41:55,659 INFO L225 Difference]: With dead ends: 77980 [2021-06-24 18:41:55,660 INFO L226 Difference]: Without dead ends: 61776 [2021-06-24 18:41:55,660 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:41:55,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61776 states. [2021-06-24 18:41:56,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61776 to 38274. [2021-06-24 18:41:56,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38274 states, 36774 states have (on average 3.298009463207701) internal successors, (121281), 38273 states have internal predecessors, (121281), 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 18:41:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38274 states to 38274 states and 121281 transitions. [2021-06-24 18:41:57,007 INFO L78 Accepts]: Start accepts. Automaton has 38274 states and 121281 transitions. Word has length 20 [2021-06-24 18:41:57,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:41:57,007 INFO L482 AbstractCegarLoop]: Abstraction has 38274 states and 121281 transitions. [2021-06-24 18:41:57,007 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 18:41:57,007 INFO L276 IsEmpty]: Start isEmpty. Operand 38274 states and 121281 transitions. [2021-06-24 18:41:57,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-24 18:41:57,029 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:41:57,030 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, 1, 1, 1, 1] [2021-06-24 18:41:57,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-06-24 18:41:57,030 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:41:57,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:41:57,030 INFO L82 PathProgramCache]: Analyzing trace with hash 509489004, now seen corresponding path program 1 times [2021-06-24 18:41:57,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:41:57,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733570436] [2021-06-24 18:41:57,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:41:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:41:57,042 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:57,043 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:41:57,045 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:57,045 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:57,049 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:57,049 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:57,053 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:57,054 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:57,059 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:57,059 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:57,065 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:57,065 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:57,072 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:57,072 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:57,072 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:57,072 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:57,073 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:57,073 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:57,073 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:57,073 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:41:57,076 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:57,076 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:41:57,076 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 18:41:57,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:41:57,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733570436] [2021-06-24 18:41:57,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733570436] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:41:57,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:41:57,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 18:41:57,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798016464] [2021-06-24 18:41:57,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 18:41:57,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:41:57,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 18:41:57,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:41:57,077 INFO L87 Difference]: Start difference. First operand 38274 states and 121281 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 18:41:57,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:41:57,406 INFO L93 Difference]: Finished difference Result 52940 states and 175805 transitions. [2021-06-24 18:41:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 18:41:57,406 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 24 [2021-06-24 18:41:57,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:41:57,467 INFO L225 Difference]: With dead ends: 52940 [2021-06-24 18:41:57,467 INFO L226 Difference]: Without dead ends: 26335 [2021-06-24 18:41:57,467 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:41:57,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26335 states. [2021-06-24 18:41:57,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26335 to 16293. [2021-06-24 18:41:57,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16293 states, 15043 states have (on average 3.023864920561058) internal successors, (45488), 16292 states have internal predecessors, (45488), 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 18:41:57,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16293 states to 16293 states and 45488 transitions. [2021-06-24 18:41:57,997 INFO L78 Accepts]: Start accepts. Automaton has 16293 states and 45488 transitions. Word has length 24 [2021-06-24 18:41:57,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:41:57,997 INFO L482 AbstractCegarLoop]: Abstraction has 16293 states and 45488 transitions. [2021-06-24 18:41:57,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 18:41:57,997 INFO L276 IsEmpty]: Start isEmpty. Operand 16293 states and 45488 transitions. [2021-06-24 18:41:58,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-24 18:41:58,004 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:41:58,004 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:41:58,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-24 18:41:58,004 INFO L430 AbstractCegarLoop]: === Iteration 7 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:41:58,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:41:58,004 INFO L82 PathProgramCache]: Analyzing trace with hash 61190664, now seen corresponding path program 1 times [2021-06-24 18:41:58,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:41:58,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120285997] [2021-06-24 18:41:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:41:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:41:58,023 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:58,023 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:41:58,026 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:58,026 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:58,030 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:58,030 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:58,035 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:58,036 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:58,042 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:58,042 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:58,049 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:58,049 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:58,057 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:58,057 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:58,065 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:58,065 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:58,065 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:58,066 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:58,066 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:58,066 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:58,066 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:58,067 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:41:58,067 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:58,067 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:41:58,070 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:41:58,070 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:41:58,070 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 18:41:58,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:41:58,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120285997] [2021-06-24 18:41:58,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120285997] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:41:58,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:41:58,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-24 18:41:58,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035212268] [2021-06-24 18:41:58,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-24 18:41:58,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:41:58,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-24 18:41:58,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 18:41:58,071 INFO L87 Difference]: Start difference. First operand 16293 states and 45488 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 18:41:58,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:41:58,204 INFO L93 Difference]: Finished difference Result 12769 states and 41964 transitions. [2021-06-24 18:41:58,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-24 18:41:58,205 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 28 [2021-06-24 18:41:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:41:58,205 INFO L225 Difference]: With dead ends: 12769 [2021-06-24 18:41:58,205 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 18:41:58,205 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 18:41:58,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 18:41:58,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 18:41:58,205 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 18:41:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 18:41:58,206 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-06-24 18:41:58,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:41:58,206 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 18:41:58,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 18:41:58,206 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 18:41:58,206 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 18:41:58,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-06-24 18:41:58,206 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork1 was SAFE (6/6) [2021-06-24 18:41:58,206 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-24 18:41:58,208 INFO L202 PluginConnector]: Adding new model bluetooth05.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 06:41:58 BasicIcfg [2021-06-24 18:41:58,208 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-24 18:41:58,208 INFO L168 Benchmark]: Toolchain (without parser) took 178568.24 ms. Allocated memory was 127.9 MB in the beginning and 8.0 GB in the end (delta: 7.9 GB). Free memory was 107.6 MB in the beginning and 4.6 GB in the end (delta: -4.5 GB). Peak memory consumption was 3.4 GB. Max. memory is 8.0 GB. [2021-06-24 18:41:58,212 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 127.9 MB. Free memory is still 108.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-24 18:41:58,212 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.04 ms. Allocated memory is still 127.9 MB. Free memory was 107.5 MB in the beginning and 105.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-24 18:41:58,213 INFO L168 Benchmark]: Boogie Preprocessor took 15.76 ms. Allocated memory is still 127.9 MB. Free memory was 105.7 MB in the beginning and 104.9 MB in the end (delta: 842.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-24 18:41:58,213 INFO L168 Benchmark]: RCFGBuilder took 279.49 ms. Allocated memory is still 127.9 MB. Free memory was 104.8 MB in the beginning and 102.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 7.2 MB. Max. memory is 8.0 GB. [2021-06-24 18:41:58,213 INFO L168 Benchmark]: TraceAbstraction took 178236.10 ms. Allocated memory was 127.9 MB in the beginning and 8.0 GB in the end (delta: 7.9 GB). Free memory was 102.3 MB in the beginning and 4.6 GB in the end (delta: -4.5 GB). Peak memory consumption was 3.4 GB. Max. memory is 8.0 GB. [2021-06-24 18:41:58,213 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 0.13 ms. Allocated memory is still 127.9 MB. Free memory is still 108.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 32.04 ms. Allocated memory is still 127.9 MB. Free memory was 107.5 MB in the beginning and 105.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.76 ms. Allocated memory is still 127.9 MB. Free memory was 105.7 MB in the beginning and 104.9 MB in the end (delta: 842.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 279.49 ms. Allocated memory is still 127.9 MB. Free memory was 104.8 MB in the beginning and 102.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 7.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 178236.10 ms. Allocated memory was 127.9 MB in the beginning and 8.0 GB in the end (delta: 7.9 GB). Free memory was 102.3 MB in the beginning and 4.6 GB in the end (delta: -4.5 GB). Peak memory consumption was 3.4 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 85484, positive: 73635, positive conditional: 73635, positive unconditional: 0, negative: 11849, negative conditional: 11849, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 77674, positive: 73635, positive conditional: 0, positive unconditional: 73635, negative: 4039, negative conditional: 0, negative unconditional: 4039, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 411, positive: 382, positive conditional: 0, positive unconditional: 382, 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: 411, positive: 354, positive conditional: 0, positive unconditional: 354, negative: 57, negative conditional: 0, negative unconditional: 57, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 57, positive: 28, positive conditional: 0, positive unconditional: 28, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 205, positive: 127, positive conditional: 0, positive unconditional: 127, negative: 78, negative conditional: 0, negative unconditional: 78, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 77674, positive: 73253, positive conditional: 0, positive unconditional: 73253, negative: 4010, negative conditional: 0, negative unconditional: 4010, unknown: 411, unknown conditional: 0, unknown unconditional: 411] , Statistics on independence cache: Total cache size (in pairs): 411, Positive cache size: 382, Positive conditional cache size: 0, Positive unconditional cache size: 382, Negative cache size: 29, Negative conditional cache size: 0, Negative unconditional cache size: 29, Independence queries for same thread: 7810 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 5215809, positive: 4457970, positive conditional: 4457970, positive unconditional: 0, negative: 757839, negative conditional: 757839, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 4820162, positive: 4457970, positive conditional: 0, positive unconditional: 4457970, negative: 362192, negative conditional: 0, negative unconditional: 362192, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 770, positive: 700, positive conditional: 0, positive unconditional: 700, negative: 70, negative conditional: 0, negative unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 770, positive: 647, positive conditional: 0, positive unconditional: 647, negative: 123, negative conditional: 0, negative unconditional: 123, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 123, positive: 53, positive conditional: 0, positive unconditional: 53, negative: 70, negative conditional: 0, negative unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 256, positive: 92, positive conditional: 0, positive unconditional: 92, negative: 164, negative conditional: 0, negative unconditional: 164, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4820162, positive: 4457270, positive conditional: 0, positive unconditional: 4457270, negative: 362122, negative conditional: 0, negative unconditional: 362122, unknown: 770, unknown conditional: 0, unknown unconditional: 770] , Statistics on independence cache: Total cache size (in pairs): 770, Positive cache size: 700, Positive conditional cache size: 0, Positive unconditional cache size: 700, Negative cache size: 70, Negative conditional cache size: 0, Negative unconditional cache size: 70, Independence queries for same thread: 395647 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 5647964, positive: 4838714, positive conditional: 4838714, positive unconditional: 0, negative: 809250, negative conditional: 809250, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 5228031, positive: 4838714, positive conditional: 0, positive unconditional: 4838714, negative: 389317, negative conditional: 0, negative unconditional: 389317, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 778, positive: 708, positive conditional: 0, positive unconditional: 708, negative: 70, negative conditional: 0, negative unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 778, positive: 654, positive conditional: 0, positive unconditional: 654, negative: 124, negative conditional: 0, negative unconditional: 124, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 124, positive: 54, positive conditional: 0, positive unconditional: 54, negative: 70, negative conditional: 0, negative unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 153, positive: 70, positive conditional: 0, positive unconditional: 70, negative: 83, negative conditional: 0, negative unconditional: 83, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 5228031, positive: 4838006, positive conditional: 0, positive unconditional: 4838006, negative: 389247, negative conditional: 0, negative unconditional: 389247, unknown: 778, unknown conditional: 0, unknown unconditional: 778] , Statistics on independence cache: Total cache size (in pairs): 778, Positive cache size: 708, Positive conditional cache size: 0, Positive unconditional cache size: 708, Negative cache size: 70, Negative conditional cache size: 0, Negative unconditional cache size: 70, Independence queries for same thread: 419933 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 4736085, positive: 4056792, positive conditional: 4056792, positive unconditional: 0, negative: 679293, negative conditional: 679293, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 4376670, positive: 4056792, positive conditional: 0, positive unconditional: 4056792, negative: 319878, negative conditional: 0, negative unconditional: 319878, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 764, positive: 694, positive conditional: 0, positive unconditional: 694, negative: 70, negative conditional: 0, negative unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 764, positive: 643, positive conditional: 0, positive unconditional: 643, negative: 121, negative conditional: 0, negative unconditional: 121, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 121, positive: 51, positive conditional: 0, positive unconditional: 51, negative: 70, negative conditional: 0, negative unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 116, positive: 59, positive conditional: 0, positive unconditional: 59, negative: 58, negative conditional: 0, negative unconditional: 58, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4376670, positive: 4056098, positive conditional: 0, positive unconditional: 4056098, negative: 319808, negative conditional: 0, negative unconditional: 319808, unknown: 764, unknown conditional: 0, unknown unconditional: 764] , Statistics on independence cache: Total cache size (in pairs): 764, Positive cache size: 694, Positive conditional cache size: 0, Positive unconditional cache size: 694, Negative cache size: 70, Negative conditional cache size: 0, Negative unconditional cache size: 70, Independence queries for same thread: 359415 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 4741507, positive: 4061497, positive conditional: 4061497, positive unconditional: 0, negative: 680010, negative conditional: 680010, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 4381737, positive: 4061497, positive conditional: 0, positive unconditional: 4061497, negative: 320240, negative conditional: 0, negative unconditional: 320240, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 767, positive: 697, positive conditional: 0, positive unconditional: 697, negative: 70, negative conditional: 0, negative unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 767, positive: 645, positive conditional: 0, positive unconditional: 645, negative: 122, negative conditional: 0, negative unconditional: 122, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 122, positive: 52, positive conditional: 0, positive unconditional: 52, negative: 70, negative conditional: 0, negative unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 129, positive: 62, positive conditional: 0, positive unconditional: 62, negative: 68, negative conditional: 0, negative unconditional: 68, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4381737, positive: 4060800, positive conditional: 0, positive unconditional: 4060800, negative: 320170, negative conditional: 0, negative unconditional: 320170, unknown: 767, unknown conditional: 0, unknown unconditional: 767] , Statistics on independence cache: Total cache size (in pairs): 767, Positive cache size: 697, Positive conditional cache size: 0, Positive unconditional cache size: 697, Negative cache size: 70, Negative conditional cache size: 0, Negative unconditional cache size: 70, Independence queries for same thread: 359770 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 4729017, positive: 4050688, positive conditional: 4050688, positive unconditional: 0, negative: 678329, negative conditional: 678329, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 4370146, positive: 4050688, positive conditional: 0, positive unconditional: 4050688, negative: 319458, negative conditional: 0, negative unconditional: 319458, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 757, positive: 687, positive conditional: 0, positive unconditional: 687, negative: 70, negative conditional: 0, negative unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 757, positive: 638, positive conditional: 0, positive unconditional: 638, negative: 119, negative conditional: 0, negative unconditional: 119, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 119, positive: 49, positive conditional: 0, positive unconditional: 49, negative: 70, negative conditional: 0, negative unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 153, positive: 64, positive conditional: 0, positive unconditional: 64, negative: 88, negative conditional: 0, negative unconditional: 88, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4370146, positive: 4050001, positive conditional: 0, positive unconditional: 4050001, negative: 319388, negative conditional: 0, negative unconditional: 319388, unknown: 757, unknown conditional: 0, unknown unconditional: 757] , Statistics on independence cache: Total cache size (in pairs): 757, Positive cache size: 687, Positive conditional cache size: 0, Positive unconditional cache size: 687, Negative cache size: 70, Negative conditional cache size: 0, Negative unconditional cache size: 70, Independence queries for same thread: 358871 - PositiveResult [Line: 36]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 60 locations, 12 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1092.8ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 81.6ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1008.4ms, PartialOrderReductionTime: 994.3ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8750occurred 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: DeviceThreadThread1of1ForFork4 with 1 thread instances CFG has 9 procedures, 60 locations, 12 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 41231.4ms, OverallIterations: 7, TraceHistogramMax: 1, EmptinessCheckTime: 1264.1ms, AutomataDifference: 9405.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14759.7ms, PartialOrderReductionTime: 14758.3ms, HoareTripleCheckerStatistics: 380 SDtfs, 441 SDslu, 534 SDs, 0 SdLazy, 487 SolverSat, 235 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 358.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 377.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=275682occurred in iteration=0, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 15023.9ms AutomataMinimizationTime, 7 MinimizatonAttempts, 68946 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 16.7ms SsaConstructionTime, 43.4ms SatisfiabilityAnalysisTime, 592.4ms InterpolantComputationTime, 132 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 125 ConstructedInterpolants, 0 QuantifiedInterpolants, 539 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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: DeviceThreadThread1of1ForFork5 with 1 thread instances CFG has 9 procedures, 60 locations, 12 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 37970.7ms, OverallIterations: 7, TraceHistogramMax: 1, EmptinessCheckTime: 1022.8ms, AutomataDifference: 8196.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15068.1ms, PartialOrderReductionTime: 15067.1ms, HoareTripleCheckerStatistics: 371 SDtfs, 447 SDslu, 598 SDs, 0 SdLazy, 539 SolverSat, 231 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 308.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 151.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=299156occurred in iteration=0, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 13339.8ms AutomataMinimizationTime, 7 MinimizatonAttempts, 69945 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.6ms SsaConstructionTime, 34.5ms SatisfiabilityAnalysisTime, 279.4ms InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 131 ConstructedInterpolants, 0 QuantifiedInterpolants, 566 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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: DeviceThreadThread1of1ForFork2 with 1 thread instances CFG has 9 procedures, 60 locations, 12 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 32506.8ms, OverallIterations: 7, TraceHistogramMax: 1, EmptinessCheckTime: 1053.5ms, AutomataDifference: 7056.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13004.8ms, PartialOrderReductionTime: 13004.0ms, HoareTripleCheckerStatistics: 380 SDtfs, 411 SDslu, 578 SDs, 0 SdLazy, 513 SolverSat, 201 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 285.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 137.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=248047occurred in iteration=0, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 11076.5ms AutomataMinimizationTime, 7 MinimizatonAttempts, 63365 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.5ms SsaConstructionTime, 13.8ms SatisfiabilityAnalysisTime, 248.5ms InterpolantComputationTime, 123 NumberOfCodeBlocks, 123 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 116 ConstructedInterpolants, 0 QuantifiedInterpolants, 503 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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 9 procedures, 60 locations, 12 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 32342.5ms, OverallIterations: 7, TraceHistogramMax: 1, EmptinessCheckTime: 764.3ms, AutomataDifference: 6978.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12921.2ms, PartialOrderReductionTime: 12920.4ms, HoareTripleCheckerStatistics: 380 SDtfs, 507 SDslu, 560 SDs, 0 SdLazy, 496 SolverSat, 254 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 311.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 149.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=248580occurred in iteration=0, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 11391.5ms AutomataMinimizationTime, 7 MinimizatonAttempts, 63416 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.3ms SsaConstructionTime, 9.0ms SatisfiabilityAnalysisTime, 241.2ms InterpolantComputationTime, 127 NumberOfCodeBlocks, 127 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 120 ConstructedInterpolants, 0 QuantifiedInterpolants, 518 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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 9 procedures, 60 locations, 12 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 32980.9ms, OverallIterations: 7, TraceHistogramMax: 1, EmptinessCheckTime: 767.9ms, AutomataDifference: 6299.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13684.9ms, PartialOrderReductionTime: 13684.2ms, HoareTripleCheckerStatistics: 380 SDtfs, 437 SDslu, 566 SDs, 0 SdLazy, 494 SolverSat, 222 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 272.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 122.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=247405occurred in iteration=0, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 11956.8ms AutomataMinimizationTime, 7 MinimizatonAttempts, 63287 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.0ms SsaConstructionTime, 8.0ms SatisfiabilityAnalysisTime, 235.1ms InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 113 ConstructedInterpolants, 0 QuantifiedInterpolants, 494 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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...