/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth04.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d310483fe8b4879eee5de19363f50e4b839cc4ec-d310483 [2021-06-24 18:26:11,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-24 18:26:11,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-24 18:26:11,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-24 18:26:11,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-24 18:26:11,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-24 18:26:11,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-24 18:26:11,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-24 18:26:11,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-24 18:26:11,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-24 18:26:11,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-24 18:26:11,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-24 18:26:11,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-24 18:26:11,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-24 18:26:11,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-24 18:26:11,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-24 18:26:11,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-24 18:26:11,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-24 18:26:11,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-24 18:26:11,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-24 18:26:11,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-24 18:26:11,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-24 18:26:11,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-24 18:26:11,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-24 18:26:11,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-24 18:26:11,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-24 18:26:11,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-24 18:26:11,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-24 18:26:11,829 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-06-24 18:26:11,849 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-24 18:26:11,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-24 18:26:11,850 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-24 18:26:11,850 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-24 18:26:11,851 INFO L138 SettingsManager]: * Use SBE=true [2021-06-24 18:26:11,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-24 18:26:11,851 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-24 18:26:11,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-24 18:26:11,851 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-24 18:26:11,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-24 18:26:11,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-24 18:26:11,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-24 18:26:11,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-24 18:26:11,852 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-24 18:26:11,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-24 18:26:11,853 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-24 18:26:11,853 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-24 18:26:11,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-24 18:26:11,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-24 18:26:11,861 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-24 18:26:11,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-24 18:26:11,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-24 18:26:11,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-24 18:26:11,864 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-24 18:26:11,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-24 18:26:11,865 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-24 18:26:11,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-24 18:26:11,865 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-24 18:26:11,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-24 18:26:11,866 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-06-24 18:26:11,866 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-24 18:26:12,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-24 18:26:12,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-24 18:26:12,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-24 18:26:12,225 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-24 18:26:12,230 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-24 18:26:12,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth04.bpl [2021-06-24 18:26:12,231 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth04.bpl' [2021-06-24 18:26:12,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-24 18:26:12,256 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-24 18:26:12,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-24 18:26:12,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-24 18:26:12,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-24 18:26:12,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (1/1) ... [2021-06-24 18:26:12,277 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (1/1) ... [2021-06-24 18:26:12,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-24 18:26:12,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-24 18:26:12,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-24 18:26:12,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-24 18:26:12,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (1/1) ... [2021-06-24 18:26:12,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (1/1) ... [2021-06-24 18:26:12,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (1/1) ... [2021-06-24 18:26:12,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (1/1) ... [2021-06-24 18:26:12,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (1/1) ... [2021-06-24 18:26:12,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (1/1) ... [2021-06-24 18:26:12,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (1/1) ... [2021-06-24 18:26:12,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-24 18:26:12,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-24 18:26:12,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-24 18:26:12,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-24 18:26:12,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-24 18:26:12,385 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-06-24 18:26:12,385 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-06-24 18:26:12,385 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-06-24 18:26:12,385 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-06-24 18:26:12,386 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-06-24 18:26:12,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-06-24 18:26:12,386 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-24 18:26:12,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-24 18:26:12,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-24 18:26:12,387 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-24 18:26:12,666 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-24 18:26:12,666 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-06-24 18:26:12,667 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-06-24 18:26:12,669 INFO L202 PluginConnector]: Adding new model bluetooth04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 06:26:12 BoogieIcfgContainer [2021-06-24 18:26:12,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-24 18:26:12,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-24 18:26:12,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-24 18:26:12,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-24 18:26:12,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 06:26:12" (1/2) ... [2021-06-24 18:26:12,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a961ce and model type bluetooth04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 06:26:12, skipping insertion in model container [2021-06-24 18:26:12,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 06:26:12" (2/2) ... [2021-06-24 18:26:12,676 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth04.bpl [2021-06-24 18:26:12,696 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-24 18:26:12,697 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-24 18:26:12,697 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-24 18:26:12,698 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-24 18:26:12,773 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-24 18:26:12,796 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-24 18:26:12,826 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:26:12,827 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:26:12,827 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:26:12,827 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:26:12,827 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:26:12,827 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:26:12,827 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:26:12,827 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-24 18:26:13,314 INFO L276 IsEmpty]: Start isEmpty. Operand has 941 states, 785 states have (on average 1.9961783439490446) internal successors, (1567), 940 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:13,343 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 18:26:13,344 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (1/5) [2021-06-24 18:26:13,345 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:26:13,347 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:26:13,347 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:26:13,347 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:26:13,347 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:26:13,347 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:26:13,347 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:26:13,348 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:26:13,348 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork4======== [2021-06-24 18:26:15,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 6941 states, 6909 states have (on average 5.094080185265596) internal successors, (35195), 6940 states have internal predecessors, (35195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-24 18:26:15,052 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:15,053 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:15,053 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:15,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:15,058 INFO L82 PathProgramCache]: Analyzing trace with hash -403325960, now seen corresponding path program 1 times [2021-06-24 18:26:15,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:15,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537717934] [2021-06-24 18:26:15,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:15,168 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:15,170 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:15,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:15,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:15,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537717934] [2021-06-24 18:26:15,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537717934] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:15,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:15,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:26:15,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899969174] [2021-06-24 18:26:15,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:26:15,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:15,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:26:15,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:15,239 INFO L87 Difference]: Start difference. First operand has 6941 states, 6909 states have (on average 5.094080185265596) internal successors, (35195), 6940 states have internal predecessors, (35195), 0 states have call successors, (0), 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 18:26:15,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:15,390 INFO L93 Difference]: Finished difference Result 6485 states and 29803 transitions. [2021-06-24 18:26:15,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:26:15,392 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 18:26:15,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:15,528 INFO L225 Difference]: With dead ends: 6485 [2021-06-24 18:26:15,529 INFO L226 Difference]: Without dead ends: 4647 [2021-06-24 18:26:15,530 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:15,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4647 states. [2021-06-24 18:26:16,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4647 to 4619. [2021-06-24 18:26:16,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4619 states, 4611 states have (on average 4.482758620689655) internal successors, (20670), 4618 states have internal predecessors, (20670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:16,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4619 states to 4619 states and 20670 transitions. [2021-06-24 18:26:16,115 INFO L78 Accepts]: Start accepts. Automaton has 4619 states and 20670 transitions. Word has length 11 [2021-06-24 18:26:16,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:16,116 INFO L482 AbstractCegarLoop]: Abstraction has 4619 states and 20670 transitions. [2021-06-24 18:26:16,117 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 18:26:16,117 INFO L276 IsEmpty]: Start isEmpty. Operand 4619 states and 20670 transitions. [2021-06-24 18:26:16,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-24 18:26:16,125 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:16,125 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:16,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-24 18:26:16,126 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:16,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:16,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1064204598, now seen corresponding path program 1 times [2021-06-24 18:26:16,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:16,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891451680] [2021-06-24 18:26:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:16,190 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,190 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:16,203 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,204 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:16,215 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,216 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:16,230 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,231 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:16,235 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:16,235 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:16,236 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 18:26:16,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:16,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891451680] [2021-06-24 18:26:16,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891451680] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:16,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:16,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:26:16,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927643304] [2021-06-24 18:26:16,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:26:16,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:16,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:26:16,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:26:16,242 INFO L87 Difference]: Start difference. First operand 4619 states and 20670 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 18:26:16,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:16,438 INFO L93 Difference]: Finished difference Result 7093 states and 32939 transitions. [2021-06-24 18:26:16,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:26:16,439 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 18:26:16,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:16,528 INFO L225 Difference]: With dead ends: 7093 [2021-06-24 18:26:16,528 INFO L226 Difference]: Without dead ends: 7093 [2021-06-24 18:26:16,529 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:26:16,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7093 states. [2021-06-24 18:26:16,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7093 to 6922. [2021-06-24 18:26:16,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6922 states, 6914 states have (on average 4.6745733294764245) internal successors, (32320), 6921 states have internal predecessors, (32320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6922 states to 6922 states and 32320 transitions. [2021-06-24 18:26:17,090 INFO L78 Accepts]: Start accepts. Automaton has 6922 states and 32320 transitions. Word has length 15 [2021-06-24 18:26:17,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:17,091 INFO L482 AbstractCegarLoop]: Abstraction has 6922 states and 32320 transitions. [2021-06-24 18:26:17,091 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 18:26:17,091 INFO L276 IsEmpty]: Start isEmpty. Operand 6922 states and 32320 transitions. [2021-06-24 18:26:17,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-24 18:26:17,103 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:17,103 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:17,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-24 18:26:17,104 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:17,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:17,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1608486168, now seen corresponding path program 2 times [2021-06-24 18:26:17,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:17,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395556232] [2021-06-24 18:26:17,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:17,140 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:17,141 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:17,142 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:17,142 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:17,145 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:17,145 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:17,145 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 18:26:17,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:17,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395556232] [2021-06-24 18:26:17,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395556232] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:17,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:17,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:26:17,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494656376] [2021-06-24 18:26:17,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:26:17,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:17,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:26:17,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:17,148 INFO L87 Difference]: Start difference. First operand 6922 states and 32320 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 18:26:17,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:17,230 INFO L93 Difference]: Finished difference Result 6560 states and 26031 transitions. [2021-06-24 18:26:17,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:26:17,231 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 18:26:17,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:17,252 INFO L225 Difference]: With dead ends: 6560 [2021-06-24 18:26:17,252 INFO L226 Difference]: Without dead ends: 3352 [2021-06-24 18:26:17,253 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:17,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2021-06-24 18:26:17,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 3054. [2021-06-24 18:26:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3054 states, 3046 states have (on average 3.9097176625082075) internal successors, (11909), 3053 states have internal predecessors, (11909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:17,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3054 states to 3054 states and 11909 transitions. [2021-06-24 18:26:17,440 INFO L78 Accepts]: Start accepts. Automaton has 3054 states and 11909 transitions. Word has length 15 [2021-06-24 18:26:17,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:17,440 INFO L482 AbstractCegarLoop]: Abstraction has 3054 states and 11909 transitions. [2021-06-24 18:26:17,440 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 18:26:17,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3054 states and 11909 transitions. [2021-06-24 18:26:17,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-24 18:26:17,447 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:17,447 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 18:26:17,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-24 18:26:17,448 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:17,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:17,449 INFO L82 PathProgramCache]: Analyzing trace with hash 624418143, now seen corresponding path program 1 times [2021-06-24 18:26:17,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:17,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220970167] [2021-06-24 18:26:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:17,496 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:17,497 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:17,501 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:17,503 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:17,509 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:17,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:17,522 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:17,523 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:17,532 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:17,533 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:17,533 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:17,534 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:17,540 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:17,540 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:17,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:17,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220970167] [2021-06-24 18:26:17,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220970167] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:17,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:17,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:26:17,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671015595] [2021-06-24 18:26:17,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:26:17,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:17,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:26:17,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:26:17,545 INFO L87 Difference]: Start difference. First operand 3054 states and 11909 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 18:26:17,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:17,663 INFO L93 Difference]: Finished difference Result 4539 states and 17981 transitions. [2021-06-24 18:26:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:26:17,664 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 18:26:17,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:17,688 INFO L225 Difference]: With dead ends: 4539 [2021-06-24 18:26:17,688 INFO L226 Difference]: Without dead ends: 4155 [2021-06-24 18:26:17,689 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:26:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-06-24 18:26:17,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3255. [2021-06-24 18:26:17,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 3247 states have (on average 3.9146904835232523) internal successors, (12711), 3254 states have internal predecessors, (12711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:17,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 12711 transitions. [2021-06-24 18:26:17,864 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 12711 transitions. Word has length 18 [2021-06-24 18:26:17,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:17,864 INFO L482 AbstractCegarLoop]: Abstraction has 3255 states and 12711 transitions. [2021-06-24 18:26:17,865 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 18:26:17,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 12711 transitions. [2021-06-24 18:26:17,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-24 18:26:17,872 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:17,872 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 18:26:17,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-24 18:26:17,872 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:17,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:17,873 INFO L82 PathProgramCache]: Analyzing trace with hash -112887388, now seen corresponding path program 1 times [2021-06-24 18:26:17,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:17,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405489731] [2021-06-24 18:26:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:17,925 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:17,926 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:17,929 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:17,932 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:17,982 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:17,983 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:17,990 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:17,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:17,999 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:18,000 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:18,009 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:18,010 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:18,010 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:18,011 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:18,011 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:18,012 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:18,016 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:18,016 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:18,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:18,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405489731] [2021-06-24 18:26:18,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405489731] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:18,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:18,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:26:18,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462524528] [2021-06-24 18:26:18,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:26:18,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:18,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:26:18,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:26:18,027 INFO L87 Difference]: Start difference. First operand 3255 states and 12711 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 18:26:18,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:18,148 INFO L93 Difference]: Finished difference Result 4436 states and 17529 transitions. [2021-06-24 18:26:18,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:26:18,148 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 18:26:18,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:18,168 INFO L225 Difference]: With dead ends: 4436 [2021-06-24 18:26:18,169 INFO L226 Difference]: Without dead ends: 3384 [2021-06-24 18:26:18,169 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:26:18,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2021-06-24 18:26:18,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 2734. [2021-06-24 18:26:18,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2726 states have (on average 3.8455612619222306) internal successors, (10483), 2733 states have internal predecessors, (10483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:18,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 10483 transitions. [2021-06-24 18:26:18,282 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 10483 transitions. Word has length 21 [2021-06-24 18:26:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:18,283 INFO L482 AbstractCegarLoop]: Abstraction has 2734 states and 10483 transitions. [2021-06-24 18:26:18,283 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 18:26:18,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 10483 transitions. [2021-06-24 18:26:18,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-24 18:26:18,288 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:18,288 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 18:26:18,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-24 18:26:18,288 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:18,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:18,289 INFO L82 PathProgramCache]: Analyzing trace with hash -635544396, now seen corresponding path program 1 times [2021-06-24 18:26:18,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:18,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042231038] [2021-06-24 18:26:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:18,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:18,346 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:18,349 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:18,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:18,357 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:18,357 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:18,365 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:18,366 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:18,389 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:18,390 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:18,398 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:18,400 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:18,414 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:18,415 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:18,415 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:18,416 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:18,416 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:18,417 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:18,417 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:18,417 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:18,434 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:18,437 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:18,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:18,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042231038] [2021-06-24 18:26:18,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042231038] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:18,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:18,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 18:26:18,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458910453] [2021-06-24 18:26:18,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 18:26:18,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:18,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 18:26:18,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:26:18,439 INFO L87 Difference]: Start difference. First operand 2734 states and 10483 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 18:26:18,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:18,726 INFO L93 Difference]: Finished difference Result 1398 states and 5767 transitions. [2021-06-24 18:26:18,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 18:26:18,727 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 18:26:18,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:18,727 INFO L225 Difference]: With dead ends: 1398 [2021-06-24 18:26:18,727 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 18:26:18,727 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:26:18,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 18:26:18,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 18:26:18,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 18:26:18,728 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-06-24 18:26:18,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:18,728 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 18:26:18,728 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 18:26:18,728 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 18:26:18,729 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 18:26:18,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-24 18:26:18,729 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork4 was SAFE (2/5) [2021-06-24 18:26:18,729 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:26:18,730 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:26:18,730 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:26:18,730 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:26:18,730 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:26:18,730 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:26:18,730 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:26:18,730 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:26:18,730 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork2======== [2021-06-24 18:26:20,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 6761 states, 6697 states have (on average 4.7518291772435415) internal successors, (31823), 6760 states have internal predecessors, (31823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:20,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-24 18:26:20,092 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:20,092 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:20,092 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:20,093 INFO L82 PathProgramCache]: Analyzing trace with hash 799578582, now seen corresponding path program 1 times [2021-06-24 18:26:20,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:20,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566791387] [2021-06-24 18:26:20,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:20,099 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:20,100 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:20,100 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:20,101 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:20,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:20,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566791387] [2021-06-24 18:26:20,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566791387] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:20,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:20,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:26:20,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578952398] [2021-06-24 18:26:20,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:26:20,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:20,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:26:20,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:20,119 INFO L87 Difference]: Start difference. First operand has 6761 states, 6697 states have (on average 4.7518291772435415) internal successors, (31823), 6760 states have internal predecessors, (31823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:20,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:20,194 INFO L93 Difference]: Finished difference Result 6275 states and 26697 transitions. [2021-06-24 18:26:20,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:26:20,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-24 18:26:20,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:20,218 INFO L225 Difference]: With dead ends: 6275 [2021-06-24 18:26:20,218 INFO L226 Difference]: Without dead ends: 4521 [2021-06-24 18:26:20,218 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:20,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-24 18:26:20,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 4493. [2021-06-24 18:26:20,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4493 states, 4477 states have (on average 4.163725709180254) internal successors, (18641), 4492 states have internal predecessors, (18641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4493 states to 4493 states and 18641 transitions. [2021-06-24 18:26:20,419 INFO L78 Accepts]: Start accepts. Automaton has 4493 states and 18641 transitions. Word has length 9 [2021-06-24 18:26:20,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:20,419 INFO L482 AbstractCegarLoop]: Abstraction has 4493 states and 18641 transitions. [2021-06-24 18:26:20,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 4493 states and 18641 transitions. [2021-06-24 18:26:20,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-24 18:26:20,422 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:20,422 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:20,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-24 18:26:20,422 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:20,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:20,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1404575434, now seen corresponding path program 1 times [2021-06-24 18:26:20,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:20,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256684733] [2021-06-24 18:26:20,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:20,448 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:20,449 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:20,449 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:20,451 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:20,453 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:20,454 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:20,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:20,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256684733] [2021-06-24 18:26:20,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256684733] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:20,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:20,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:26:20,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750218252] [2021-06-24 18:26:20,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:26:20,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:20,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:26:20,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:20,456 INFO L87 Difference]: Start difference. First operand 4493 states and 18641 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:20,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:20,494 INFO L93 Difference]: Finished difference Result 4457 states and 15159 transitions. [2021-06-24 18:26:20,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:26:20,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-24 18:26:20,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:20,504 INFO L225 Difference]: With dead ends: 4457 [2021-06-24 18:26:20,504 INFO L226 Difference]: Without dead ends: 2486 [2021-06-24 18:26:20,505 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:20,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-06-24 18:26:20,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2226. [2021-06-24 18:26:20,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2210 states have (on average 3.3828054298642534) internal successors, (7476), 2225 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:20,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 7476 transitions. [2021-06-24 18:26:20,583 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 7476 transitions. Word has length 13 [2021-06-24 18:26:20,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:20,583 INFO L482 AbstractCegarLoop]: Abstraction has 2226 states and 7476 transitions. [2021-06-24 18:26:20,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 7476 transitions. [2021-06-24 18:26:20,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-24 18:26:20,585 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:20,585 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:20,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-24 18:26:20,585 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:20,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:20,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1805860204, now seen corresponding path program 2 times [2021-06-24 18:26:20,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:20,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777166844] [2021-06-24 18:26:20,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:20,606 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:20,607 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:20,610 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:20,611 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:20,618 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:20,618 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:20,626 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:20,627 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:20,632 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:20,633 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:20,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:20,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777166844] [2021-06-24 18:26:20,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777166844] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:20,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:20,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:26:20,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136597085] [2021-06-24 18:26:20,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:26:20,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:20,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:26:20,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:26:20,637 INFO L87 Difference]: Start difference. First operand 2226 states and 7476 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:20,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:20,702 INFO L93 Difference]: Finished difference Result 3464 states and 12232 transitions. [2021-06-24 18:26:20,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:26:20,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-24 18:26:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:20,715 INFO L225 Difference]: With dead ends: 3464 [2021-06-24 18:26:20,716 INFO L226 Difference]: Without dead ends: 3418 [2021-06-24 18:26:20,716 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:26:20,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2021-06-24 18:26:20,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 3204. [2021-06-24 18:26:20,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3204 states, 3188 states have (on average 3.5956712672521958) internal successors, (11463), 3203 states have internal predecessors, (11463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:20,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3204 states to 3204 states and 11463 transitions. [2021-06-24 18:26:20,829 INFO L78 Accepts]: Start accepts. Automaton has 3204 states and 11463 transitions. Word has length 13 [2021-06-24 18:26:20,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:20,831 INFO L482 AbstractCegarLoop]: Abstraction has 3204 states and 11463 transitions. [2021-06-24 18:26:20,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:20,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3204 states and 11463 transitions. [2021-06-24 18:26:20,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-24 18:26:20,835 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:20,835 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:20,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-24 18:26:20,835 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:20,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:20,836 INFO L82 PathProgramCache]: Analyzing trace with hash -222121371, now seen corresponding path program 1 times [2021-06-24 18:26:20,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:20,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275936713] [2021-06-24 18:26:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:20,861 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:20,862 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:20,865 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:20,866 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:20,872 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:20,873 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:20,880 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:20,882 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:20,892 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:20,893 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:20,894 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:20,895 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:20,899 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:20,899 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:20,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:20,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275936713] [2021-06-24 18:26:20,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275936713] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:20,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:20,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:26:20,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037384479] [2021-06-24 18:26:20,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:26:20,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:20,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:26:20,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:26:20,901 INFO L87 Difference]: Start difference. First operand 3204 states and 11463 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:20,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:20,993 INFO L93 Difference]: Finished difference Result 4686 states and 17086 transitions. [2021-06-24 18:26:20,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:26:20,994 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-24 18:26:20,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:21,011 INFO L225 Difference]: With dead ends: 4686 [2021-06-24 18:26:21,011 INFO L226 Difference]: Without dead ends: 4274 [2021-06-24 18:26:21,012 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:26:21,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4274 states. [2021-06-24 18:26:21,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4274 to 3383. [2021-06-24 18:26:21,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3383 states, 3367 states have (on average 3.599346599346599) internal successors, (12119), 3382 states have internal predecessors, (12119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:21,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 12119 transitions. [2021-06-24 18:26:21,137 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 12119 transitions. Word has length 16 [2021-06-24 18:26:21,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:21,138 INFO L482 AbstractCegarLoop]: Abstraction has 3383 states and 12119 transitions. [2021-06-24 18:26:21,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:21,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 12119 transitions. [2021-06-24 18:26:21,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-24 18:26:21,143 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:21,143 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:21,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-24 18:26:21,143 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:21,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:21,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1875386057, now seen corresponding path program 1 times [2021-06-24 18:26:21,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:21,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693846029] [2021-06-24 18:26:21,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:21,175 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,175 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:21,179 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,179 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:21,190 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,190 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:21,198 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,199 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:21,208 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,208 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:21,219 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,220 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:21,222 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,224 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:21,225 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,225 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:21,229 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,229 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:21,230 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 18:26:21,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:21,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693846029] [2021-06-24 18:26:21,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693846029] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:21,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:21,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:26:21,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929533388] [2021-06-24 18:26:21,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:26:21,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:21,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:26:21,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:26:21,232 INFO L87 Difference]: Start difference. First operand 3383 states and 12119 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:21,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:21,348 INFO L93 Difference]: Finished difference Result 4433 states and 16098 transitions. [2021-06-24 18:26:21,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:26:21,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-24 18:26:21,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:21,365 INFO L225 Difference]: With dead ends: 4433 [2021-06-24 18:26:21,365 INFO L226 Difference]: Without dead ends: 3370 [2021-06-24 18:26:21,366 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:26:21,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3370 states. [2021-06-24 18:26:21,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3370 to 2721. [2021-06-24 18:26:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2721 states, 2705 states have (on average 3.523105360443623) internal successors, (9530), 2720 states have internal predecessors, (9530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 9530 transitions. [2021-06-24 18:26:21,461 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 9530 transitions. Word has length 20 [2021-06-24 18:26:21,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:21,462 INFO L482 AbstractCegarLoop]: Abstraction has 2721 states and 9530 transitions. [2021-06-24 18:26:21,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:21,462 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 9530 transitions. [2021-06-24 18:26:21,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-24 18:26:21,466 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:21,466 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 18:26:21,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-24 18:26:21,467 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:21,467 INFO L82 PathProgramCache]: Analyzing trace with hash 2112477725, now seen corresponding path program 1 times [2021-06-24 18:26:21,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:21,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288806116] [2021-06-24 18:26:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:21,492 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,496 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:21,499 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,500 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:21,507 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,510 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:21,522 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,522 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:21,531 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,532 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:21,544 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,545 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:21,555 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,556 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:21,556 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,557 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:21,557 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,558 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:21,558 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,558 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:21,564 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:21,564 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:21,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:21,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288806116] [2021-06-24 18:26:21,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288806116] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:21,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:21,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 18:26:21,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955374888] [2021-06-24 18:26:21,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 18:26:21,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:21,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 18:26:21,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:26:21,568 INFO L87 Difference]: Start difference. First operand 2721 states and 9530 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 18:26:21,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:21,660 INFO L93 Difference]: Finished difference Result 1393 states and 5308 transitions. [2021-06-24 18:26:21,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 18:26:21,661 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 18:26:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:21,661 INFO L225 Difference]: With dead ends: 1393 [2021-06-24 18:26:21,661 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 18:26:21,661 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:26:21,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 18:26:21,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 18:26:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:21,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 18:26:21,662 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-06-24 18:26:21,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:21,662 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 18:26:21,662 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 18:26:21,662 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 18:26:21,662 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 18:26:21,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-24 18:26:21,663 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork2 was SAFE (3/5) [2021-06-24 18:26:21,664 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:26:21,665 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:26:21,665 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:26:21,665 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:26:21,665 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:26:21,665 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:26:21,665 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:26:21,665 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:26:21,665 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork3======== [2021-06-24 18:26:22,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 6791 states, 6727 states have (on average 4.767801397353947) internal successors, (32073), 6790 states have internal predecessors, (32073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:22,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-24 18:26:22,686 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:22,686 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:22,686 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:22,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:22,686 INFO L82 PathProgramCache]: Analyzing trace with hash -982842544, now seen corresponding path program 1 times [2021-06-24 18:26:22,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:22,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314817221] [2021-06-24 18:26:22,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:22,691 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:22,692 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:22,692 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:22,693 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:22,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:22,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314817221] [2021-06-24 18:26:22,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314817221] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:22,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:22,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:26:22,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692969073] [2021-06-24 18:26:22,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:26:22,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:22,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:26:22,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:22,713 INFO L87 Difference]: Start difference. First operand has 6791 states, 6727 states have (on average 4.767801397353947) internal successors, (32073), 6790 states have internal predecessors, (32073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:22,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:22,778 INFO L93 Difference]: Finished difference Result 6317 states and 26955 transitions. [2021-06-24 18:26:22,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:26:22,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-24 18:26:22,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:22,799 INFO L225 Difference]: With dead ends: 6317 [2021-06-24 18:26:22,799 INFO L226 Difference]: Without dead ends: 4539 [2021-06-24 18:26:22,799 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:22,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4539 states. [2021-06-24 18:26:22,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4539 to 4511. [2021-06-24 18:26:22,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 4495 states have (on average 4.176418242491658) internal successors, (18773), 4510 states have internal predecessors, (18773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:22,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 18773 transitions. [2021-06-24 18:26:22,957 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 18773 transitions. Word has length 10 [2021-06-24 18:26:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:22,957 INFO L482 AbstractCegarLoop]: Abstraction has 4511 states and 18773 transitions. [2021-06-24 18:26:22,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:22,957 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 18773 transitions. [2021-06-24 18:26:22,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-24 18:26:22,961 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:22,961 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:22,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-24 18:26:22,961 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:22,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:22,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1453167954, now seen corresponding path program 1 times [2021-06-24 18:26:22,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:22,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184872892] [2021-06-24 18:26:22,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:22,967 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:22,967 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:22,968 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:22,968 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:22,970 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:22,971 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:22,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:22,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184872892] [2021-06-24 18:26:22,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184872892] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:22,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:22,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:26:22,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517743581] [2021-06-24 18:26:22,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:26:22,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:22,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:26:22,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:22,972 INFO L87 Difference]: Start difference. First operand 4511 states and 18773 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:23,004 INFO L93 Difference]: Finished difference Result 4477 states and 15267 transitions. [2021-06-24 18:26:23,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:26:23,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-24 18:26:23,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:23,013 INFO L225 Difference]: With dead ends: 4477 [2021-06-24 18:26:23,014 INFO L226 Difference]: Without dead ends: 2452 [2021-06-24 18:26:23,014 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 18:26:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-06-24 18:26:23,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2198. [2021-06-24 18:26:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2198 states, 2182 states have (on average 3.3941338221814847) internal successors, (7406), 2197 states have internal predecessors, (7406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:23,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2198 states to 2198 states and 7406 transitions. [2021-06-24 18:26:23,073 INFO L78 Accepts]: Start accepts. Automaton has 2198 states and 7406 transitions. Word has length 14 [2021-06-24 18:26:23,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:23,073 INFO L482 AbstractCegarLoop]: Abstraction has 2198 states and 7406 transitions. [2021-06-24 18:26:23,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:23,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2198 states and 7406 transitions. [2021-06-24 18:26:23,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-24 18:26:23,075 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:23,075 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:23,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-24 18:26:23,075 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:23,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:23,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1194551694, now seen corresponding path program 2 times [2021-06-24 18:26:23,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:23,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001494669] [2021-06-24 18:26:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:23,082 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,083 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:23,086 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,086 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,092 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,098 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,099 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:23,102 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,102 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:23,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:23,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001494669] [2021-06-24 18:26:23,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001494669] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:23,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:23,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:26:23,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941006003] [2021-06-24 18:26:23,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:26:23,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:23,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:26:23,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:26:23,104 INFO L87 Difference]: Start difference. First operand 2198 states and 7406 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:23,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:23,159 INFO L93 Difference]: Finished difference Result 3432 states and 12163 transitions. [2021-06-24 18:26:23,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:26:23,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-24 18:26:23,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:23,170 INFO L225 Difference]: With dead ends: 3432 [2021-06-24 18:26:23,170 INFO L226 Difference]: Without dead ends: 3390 [2021-06-24 18:26:23,170 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:26:23,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3390 states. [2021-06-24 18:26:23,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3390 to 3178. [2021-06-24 18:26:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3178 states, 3162 states have (on average 3.609108159392789) internal successors, (11412), 3177 states have internal predecessors, (11412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:23,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 11412 transitions. [2021-06-24 18:26:23,253 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 11412 transitions. Word has length 14 [2021-06-24 18:26:23,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:23,253 INFO L482 AbstractCegarLoop]: Abstraction has 3178 states and 11412 transitions. [2021-06-24 18:26:23,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:23,253 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 11412 transitions. [2021-06-24 18:26:23,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-24 18:26:23,256 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:23,256 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:23,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-24 18:26:23,257 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:23,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:23,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1226144075, now seen corresponding path program 1 times [2021-06-24 18:26:23,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:23,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487439901] [2021-06-24 18:26:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:23,265 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,266 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:23,269 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,269 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,275 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,275 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,282 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,282 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,290 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,290 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,290 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,291 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:23,294 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,295 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:23,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:23,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487439901] [2021-06-24 18:26:23,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487439901] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:23,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:23,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:26:23,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749616380] [2021-06-24 18:26:23,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:26:23,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:23,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:26:23,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:26:23,296 INFO L87 Difference]: Start difference. First operand 3178 states and 11412 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:23,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:23,375 INFO L93 Difference]: Finished difference Result 4684 states and 17115 transitions. [2021-06-24 18:26:23,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:26:23,376 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-24 18:26:23,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:23,388 INFO L225 Difference]: With dead ends: 4684 [2021-06-24 18:26:23,389 INFO L226 Difference]: Without dead ends: 4282 [2021-06-24 18:26:23,390 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:26:23,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2021-06-24 18:26:23,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 3386. [2021-06-24 18:26:23,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3386 states, 3370 states have (on average 3.6050445103857567) internal successors, (12149), 3385 states have internal predecessors, (12149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:23,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3386 states to 3386 states and 12149 transitions. [2021-06-24 18:26:23,490 INFO L78 Accepts]: Start accepts. Automaton has 3386 states and 12149 transitions. Word has length 17 [2021-06-24 18:26:23,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:23,490 INFO L482 AbstractCegarLoop]: Abstraction has 3386 states and 12149 transitions. [2021-06-24 18:26:23,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:23,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3386 states and 12149 transitions. [2021-06-24 18:26:23,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-24 18:26:23,496 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:23,496 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:23,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-24 18:26:23,497 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:23,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:23,497 INFO L82 PathProgramCache]: Analyzing trace with hash -311092226, now seen corresponding path program 1 times [2021-06-24 18:26:23,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:23,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387517373] [2021-06-24 18:26:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:23,515 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,516 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:23,531 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,531 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,537 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,538 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,544 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,545 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,555 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,556 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,573 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,574 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,575 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,575 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,575 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,576 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:23,581 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,581 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:23,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:23,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387517373] [2021-06-24 18:26:23,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387517373] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:23,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:23,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:26:23,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856122821] [2021-06-24 18:26:23,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:26:23,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:23,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:26:23,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:26:23,583 INFO L87 Difference]: Start difference. First operand 3386 states and 12149 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:23,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:23,686 INFO L93 Difference]: Finished difference Result 4436 states and 16110 transitions. [2021-06-24 18:26:23,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:26:23,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-24 18:26:23,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:23,696 INFO L225 Difference]: With dead ends: 4436 [2021-06-24 18:26:23,697 INFO L226 Difference]: Without dead ends: 3370 [2021-06-24 18:26:23,697 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:26:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3370 states. [2021-06-24 18:26:23,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3370 to 2721. [2021-06-24 18:26:23,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2721 states, 2705 states have (on average 3.5168207024029576) internal successors, (9513), 2720 states have internal predecessors, (9513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:23,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 9513 transitions. [2021-06-24 18:26:23,784 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 9513 transitions. Word has length 20 [2021-06-24 18:26:23,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:23,784 INFO L482 AbstractCegarLoop]: Abstraction has 2721 states and 9513 transitions. [2021-06-24 18:26:23,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:23,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 9513 transitions. [2021-06-24 18:26:23,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-24 18:26:23,787 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:23,787 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 18:26:23,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-24 18:26:23,787 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:23,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:23,788 INFO L82 PathProgramCache]: Analyzing trace with hash 972210882, now seen corresponding path program 1 times [2021-06-24 18:26:23,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:23,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961690422] [2021-06-24 18:26:23,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:23,802 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,803 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:23,805 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,806 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,812 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,812 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,819 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,820 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,827 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,828 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,837 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,847 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,848 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,849 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,849 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,850 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:23,850 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,850 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:23,854 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:23,854 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:23,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:23,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961690422] [2021-06-24 18:26:23,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961690422] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:23,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:23,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 18:26:23,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154986978] [2021-06-24 18:26:23,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 18:26:23,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:23,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 18:26:23,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:26:23,857 INFO L87 Difference]: Start difference. First operand 2721 states and 9513 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 18:26:23,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:23,957 INFO L93 Difference]: Finished difference Result 1393 states and 5298 transitions. [2021-06-24 18:26:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 18:26:23,958 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 18:26:23,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:23,958 INFO L225 Difference]: With dead ends: 1393 [2021-06-24 18:26:23,958 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 18:26:23,958 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:26:23,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 18:26:23,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 18:26:23,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:23,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 18:26:23,959 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-06-24 18:26:23,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:23,959 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 18:26:23,959 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 18:26:23,959 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 18:26:23,959 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 18:26:23,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-24 18:26:23,960 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork3 was SAFE (4/5) [2021-06-24 18:26:23,960 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-24 18:26:23,961 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 18:26:23,961 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 18:26:23,961 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 18:26:23,961 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 18:26:23,961 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 18:26:23,961 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 18:26:23,961 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 18:26:23,961 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork1======== [2021-06-24 18:26:24,828 INFO L276 IsEmpty]: Start isEmpty. Operand has 6755 states, 6691 states have (on average 4.6803168435211475) internal successors, (31316), 6754 states have internal predecessors, (31316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:24,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-24 18:26:24,829 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:24,829 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:24,829 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:24,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:24,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2104002414, now seen corresponding path program 1 times [2021-06-24 18:26:24,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:24,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420152863] [2021-06-24 18:26:24,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:24,834 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:24,834 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:24,835 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:24,835 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:24,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:24,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420152863] [2021-06-24 18:26:24,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420152863] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:24,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:24,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 18:26:24,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015074313] [2021-06-24 18:26:24,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:26:24,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:24,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:26:24,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:24,851 INFO L87 Difference]: Start difference. First operand has 6755 states, 6691 states have (on average 4.6803168435211475) internal successors, (31316), 6754 states have internal predecessors, (31316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:24,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:24,908 INFO L93 Difference]: Finished difference Result 6229 states and 26164 transitions. [2021-06-24 18:26:24,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:26:24,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-24 18:26:24,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:24,923 INFO L225 Difference]: With dead ends: 6229 [2021-06-24 18:26:24,923 INFO L226 Difference]: Without dead ends: 4507 [2021-06-24 18:26:24,924 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:24,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4507 states. [2021-06-24 18:26:25,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4507 to 4479. [2021-06-24 18:26:25,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4479 states, 4463 states have (on average 4.105982522966614) internal successors, (18325), 4478 states have internal predecessors, (18325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:25,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4479 states to 4479 states and 18325 transitions. [2021-06-24 18:26:25,080 INFO L78 Accepts]: Start accepts. Automaton has 4479 states and 18325 transitions. Word has length 8 [2021-06-24 18:26:25,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:25,080 INFO L482 AbstractCegarLoop]: Abstraction has 4479 states and 18325 transitions. [2021-06-24 18:26:25,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:25,080 INFO L276 IsEmpty]: Start isEmpty. Operand 4479 states and 18325 transitions. [2021-06-24 18:26:25,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-24 18:26:25,081 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:25,081 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:25,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-24 18:26:25,082 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:25,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:25,082 INFO L82 PathProgramCache]: Analyzing trace with hash -30459604, now seen corresponding path program 1 times [2021-06-24 18:26:25,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:25,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571362369] [2021-06-24 18:26:25,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:25,088 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,088 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:25,090 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,091 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:25,096 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,096 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:25,102 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,103 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:25,106 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,106 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:25,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:25,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571362369] [2021-06-24 18:26:25,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571362369] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:25,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:25,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-24 18:26:25,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517601785] [2021-06-24 18:26:25,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-24 18:26:25,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:25,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-24 18:26:25,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:26:25,108 INFO L87 Difference]: Start difference. First operand 4479 states and 18325 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:25,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:25,188 INFO L93 Difference]: Finished difference Result 6867 states and 29327 transitions. [2021-06-24 18:26:25,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-24 18:26:25,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-24 18:26:25,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:25,211 INFO L225 Difference]: With dead ends: 6867 [2021-06-24 18:26:25,211 INFO L226 Difference]: Without dead ends: 6867 [2021-06-24 18:26:25,211 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-24 18:26:25,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6867 states. [2021-06-24 18:26:25,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6867 to 6677. [2021-06-24 18:26:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6677 states, 6661 states have (on average 4.316619126257319) internal successors, (28753), 6676 states have internal predecessors, (28753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:25,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6677 states to 6677 states and 28753 transitions. [2021-06-24 18:26:25,443 INFO L78 Accepts]: Start accepts. Automaton has 6677 states and 28753 transitions. Word has length 12 [2021-06-24 18:26:25,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:25,443 INFO L482 AbstractCegarLoop]: Abstraction has 6677 states and 28753 transitions. [2021-06-24 18:26:25,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:25,443 INFO L276 IsEmpty]: Start isEmpty. Operand 6677 states and 28753 transitions. [2021-06-24 18:26:25,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-24 18:26:25,445 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:25,445 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:25,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-24 18:26:25,445 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:25,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:25,445 INFO L82 PathProgramCache]: Analyzing trace with hash 84831566, now seen corresponding path program 2 times [2021-06-24 18:26:25,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:25,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763067628] [2021-06-24 18:26:25,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:25,450 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,451 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:25,451 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,451 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:25,454 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,454 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:25,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:25,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763067628] [2021-06-24 18:26:25,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763067628] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:25,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:25,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 18:26:25,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344350297] [2021-06-24 18:26:25,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 18:26:25,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:25,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 18:26:25,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:25,455 INFO L87 Difference]: Start difference. First operand 6677 states and 28753 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:25,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:25,498 INFO L93 Difference]: Finished difference Result 6313 states and 22794 transitions. [2021-06-24 18:26:25,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 18:26:25,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-24 18:26:25,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:25,508 INFO L225 Difference]: With dead ends: 6313 [2021-06-24 18:26:25,508 INFO L226 Difference]: Without dead ends: 3545 [2021-06-24 18:26:25,510 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 18:26:25,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3545 states. [2021-06-24 18:26:25,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3545 to 3203. [2021-06-24 18:26:25,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3187 states have (on average 3.544712896140571) internal successors, (11297), 3202 states have internal predecessors, (11297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:25,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 11297 transitions. [2021-06-24 18:26:25,602 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 11297 transitions. Word has length 12 [2021-06-24 18:26:25,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:25,602 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 11297 transitions. [2021-06-24 18:26:25,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:25,602 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 11297 transitions. [2021-06-24 18:26:25,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-24 18:26:25,605 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:25,605 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:25,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-24 18:26:25,606 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:25,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:25,607 INFO L82 PathProgramCache]: Analyzing trace with hash -75040697, now seen corresponding path program 1 times [2021-06-24 18:26:25,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:25,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067163866] [2021-06-24 18:26:25,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:25,627 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,627 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:25,630 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,630 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:25,639 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,643 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:25,650 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:25,658 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:25,659 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:25,663 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,669 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:25,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:25,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067163866] [2021-06-24 18:26:25,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067163866] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:25,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:25,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 18:26:25,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273017558] [2021-06-24 18:26:25,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 18:26:25,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:25,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 18:26:25,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:26:25,671 INFO L87 Difference]: Start difference. First operand 3203 states and 11297 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:25,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:25,746 INFO L93 Difference]: Finished difference Result 4685 states and 16863 transitions. [2021-06-24 18:26:25,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 18:26:25,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-24 18:26:25,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:25,757 INFO L225 Difference]: With dead ends: 4685 [2021-06-24 18:26:25,758 INFO L226 Difference]: Without dead ends: 4273 [2021-06-24 18:26:25,758 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 18:26:25,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4273 states. [2021-06-24 18:26:25,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4273 to 3382. [2021-06-24 18:26:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3382 states, 3366 states have (on average 3.5567439096850864) internal successors, (11972), 3381 states have internal predecessors, (11972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 11972 transitions. [2021-06-24 18:26:25,856 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 11972 transitions. Word has length 16 [2021-06-24 18:26:25,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:25,856 INFO L482 AbstractCegarLoop]: Abstraction has 3382 states and 11972 transitions. [2021-06-24 18:26:25,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 11972 transitions. [2021-06-24 18:26:25,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-24 18:26:25,860 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:25,860 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-24 18:26:25,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-24 18:26:25,860 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:25,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:25,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1600134065, now seen corresponding path program 1 times [2021-06-24 18:26:25,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:25,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374142393] [2021-06-24 18:26:25,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:25,871 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,871 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:25,874 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,874 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:25,879 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,880 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:25,886 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,886 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:25,894 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,894 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:25,902 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,903 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:25,903 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,904 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:25,904 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,904 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:25,908 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:25,908 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:25,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:25,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374142393] [2021-06-24 18:26:25,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374142393] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:25,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:25,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-24 18:26:25,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710348626] [2021-06-24 18:26:25,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 18:26:25,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:25,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 18:26:25,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:26:25,910 INFO L87 Difference]: Start difference. First operand 3382 states and 11972 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:26,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:26,008 INFO L93 Difference]: Finished difference Result 4432 states and 16015 transitions. [2021-06-24 18:26:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 18:26:26,009 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-24 18:26:26,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:26,018 INFO L225 Difference]: With dead ends: 4432 [2021-06-24 18:26:26,018 INFO L226 Difference]: Without dead ends: 3370 [2021-06-24 18:26:26,018 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 18:26:26,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3370 states. [2021-06-24 18:26:26,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3370 to 2721. [2021-06-24 18:26:26,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2721 states, 2705 states have (on average 3.523105360443623) internal successors, (9530), 2720 states have internal predecessors, (9530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:26,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 9530 transitions. [2021-06-24 18:26:26,089 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 9530 transitions. Word has length 20 [2021-06-24 18:26:26,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:26,089 INFO L482 AbstractCegarLoop]: Abstraction has 2721 states and 9530 transitions. [2021-06-24 18:26:26,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:26,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 9530 transitions. [2021-06-24 18:26:26,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-24 18:26:26,092 INFO L496 BasicCegarLoop]: Found error trace [2021-06-24 18:26:26,092 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 18:26:26,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-24 18:26:26,092 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 18:26:26,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 18:26:26,093 INFO L82 PathProgramCache]: Analyzing trace with hash -957119899, now seen corresponding path program 1 times [2021-06-24 18:26:26,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 18:26:26,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103374486] [2021-06-24 18:26:26,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 18:26:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 18:26:26,105 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:26,105 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-24 18:26:26,108 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:26,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:26,115 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:26,115 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:26,122 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:26,123 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:26,131 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:26,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:26,142 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:26,142 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:26,151 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:26,152 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:26,153 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:26,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:26,153 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:26,154 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-06-24 18:26:26,154 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:26,155 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-24 18:26:26,158 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-24 18:26:26,159 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-24 18:26:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 18:26:26,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 18:26:26,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103374486] [2021-06-24 18:26:26,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103374486] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 18:26:26,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 18:26:26,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-24 18:26:26,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931995787] [2021-06-24 18:26:26,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 18:26:26,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 18:26:26,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 18:26:26,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:26:26,160 INFO L87 Difference]: Start difference. First operand 2721 states and 9530 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 18:26:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-24 18:26:26,242 INFO L93 Difference]: Finished difference Result 1393 states and 5300 transitions. [2021-06-24 18:26:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 18:26:26,242 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 18:26:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-24 18:26:26,242 INFO L225 Difference]: With dead ends: 1393 [2021-06-24 18:26:26,243 INFO L226 Difference]: Without dead ends: 0 [2021-06-24 18:26:26,243 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 18:26:26,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-24 18:26:26,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-24 18:26:26,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 18:26:26,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-24 18:26:26,243 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-06-24 18:26:26,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-24 18:26:26,243 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-24 18:26:26,244 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 18:26:26,244 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-24 18:26:26,244 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-24 18:26:26,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-24 18:26:26,244 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork1 was SAFE (5/5) [2021-06-24 18:26:26,244 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-24 18:26:26,246 INFO L202 PluginConnector]: Adding new model bluetooth04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 06:26:26 BasicIcfg [2021-06-24 18:26:26,247 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-24 18:26:26,247 INFO L168 Benchmark]: Toolchain (without parser) took 13991.14 ms. Allocated memory was 205.5 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 185.5 MB in the beginning and 1.0 GB in the end (delta: -837.7 MB). Peak memory consumption was 877.8 MB. Max. memory is 8.0 GB. [2021-06-24 18:26:26,247 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 205.5 MB. Free memory is still 186.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-24 18:26:26,247 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.35 ms. Allocated memory is still 205.5 MB. Free memory was 185.4 MB in the beginning and 183.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-24 18:26:26,247 INFO L168 Benchmark]: Boogie Preprocessor took 16.97 ms. Allocated memory is still 205.5 MB. Free memory was 183.6 MB in the beginning and 182.8 MB in the end (delta: 837.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-24 18:26:26,248 INFO L168 Benchmark]: RCFGBuilder took 356.30 ms. Allocated memory is still 205.5 MB. Free memory was 182.7 MB in the beginning and 169.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-24 18:26:26,248 INFO L168 Benchmark]: TraceAbstraction took 13575.74 ms. Allocated memory was 205.5 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 169.3 MB in the beginning and 1.0 GB in the end (delta: -853.9 MB). Peak memory consumption was 862.1 MB. Max. memory is 8.0 GB. [2021-06-24 18:26:26,248 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 0.18 ms. Allocated memory is still 205.5 MB. Free memory is still 186.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.35 ms. Allocated memory is still 205.5 MB. Free memory was 185.4 MB in the beginning and 183.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.97 ms. Allocated memory is still 205.5 MB. Free memory was 183.6 MB in the beginning and 182.8 MB in the end (delta: 837.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 356.30 ms. Allocated memory is still 205.5 MB. Free memory was 182.7 MB in the beginning and 169.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13575.74 ms. Allocated memory was 205.5 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 169.3 MB in the beginning and 1.0 GB in the end (delta: -853.9 MB). Peak memory consumption was 862.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 3643, positive: 3050, positive conditional: 3050, positive unconditional: 0, negative: 593, negative conditional: 593, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 3280, positive: 3050, positive conditional: 0, positive unconditional: 3050, negative: 230, negative conditional: 0, negative unconditional: 230, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 208, positive: 193, positive conditional: 0, positive unconditional: 193, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 208, positive: 175, positive conditional: 0, positive unconditional: 175, negative: 33, negative conditional: 0, negative unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 33, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 181, positive: 117, positive conditional: 0, positive unconditional: 117, negative: 64, negative conditional: 0, negative unconditional: 64, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3280, positive: 2857, positive conditional: 0, positive unconditional: 2857, negative: 215, negative conditional: 0, negative unconditional: 215, unknown: 208, unknown conditional: 0, unknown unconditional: 208] , Statistics on independence cache: Total cache size (in pairs): 208, Positive cache size: 193, Positive conditional cache size: 0, Positive unconditional cache size: 193, Negative cache size: 15, Negative conditional cache size: 0, Negative unconditional cache size: 15, Independence queries for same thread: 363 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 87947, positive: 72878, positive conditional: 72878, positive unconditional: 0, negative: 15069, negative conditional: 15069, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 78404, positive: 72878, positive conditional: 0, positive unconditional: 72878, negative: 5526, negative conditional: 0, negative unconditional: 5526, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 495, positive: 448, positive conditional: 0, positive unconditional: 448, negative: 47, negative conditional: 0, negative unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 495, positive: 412, positive conditional: 0, positive unconditional: 412, negative: 83, negative conditional: 0, negative unconditional: 83, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 83, positive: 36, positive conditional: 0, positive unconditional: 36, negative: 47, negative conditional: 0, negative unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 189, positive: 78, positive conditional: 0, positive unconditional: 78, negative: 111, negative conditional: 0, negative unconditional: 111, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 78404, positive: 72430, positive conditional: 0, positive unconditional: 72430, negative: 5479, negative conditional: 0, negative unconditional: 5479, unknown: 495, unknown conditional: 0, unknown unconditional: 495] , Statistics on independence cache: Total cache size (in pairs): 495, Positive cache size: 448, Positive conditional cache size: 0, Positive unconditional cache size: 448, Negative cache size: 47, Negative conditional cache size: 0, Negative unconditional cache size: 47, Independence queries for same thread: 9543 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 85500, positive: 70842, positive conditional: 70842, positive unconditional: 0, negative: 14658, negative conditional: 14658, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 76332, positive: 70842, positive conditional: 0, positive unconditional: 70842, negative: 5490, negative conditional: 0, negative unconditional: 5490, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 442, positive: 396, positive conditional: 0, positive unconditional: 396, negative: 46, negative conditional: 0, negative unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 442, positive: 361, positive conditional: 0, positive unconditional: 361, negative: 81, negative conditional: 0, negative unconditional: 81, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 81, positive: 35, positive conditional: 0, positive unconditional: 35, negative: 46, negative conditional: 0, negative unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 212, positive: 102, positive conditional: 0, positive unconditional: 102, negative: 111, negative conditional: 0, negative unconditional: 111, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 76332, positive: 70446, positive conditional: 0, positive unconditional: 70446, negative: 5444, negative conditional: 0, negative unconditional: 5444, unknown: 442, unknown conditional: 0, unknown unconditional: 442] , Statistics on independence cache: Total cache size (in pairs): 442, Positive cache size: 396, Positive conditional cache size: 0, Positive unconditional cache size: 396, Negative cache size: 46, Negative conditional cache size: 0, Negative unconditional cache size: 46, Independence queries for same thread: 9168 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 85743, positive: 71027, positive conditional: 71027, positive unconditional: 0, negative: 14716, negative conditional: 14716, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 76497, positive: 71027, positive conditional: 0, positive unconditional: 71027, negative: 5470, negative conditional: 0, negative unconditional: 5470, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 471, positive: 424, positive conditional: 0, positive unconditional: 424, negative: 47, negative conditional: 0, negative unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 471, positive: 389, positive conditional: 0, positive unconditional: 389, negative: 82, negative conditional: 0, negative unconditional: 82, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 82, positive: 35, positive conditional: 0, positive unconditional: 35, negative: 47, negative conditional: 0, negative unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 107, positive: 47, positive conditional: 0, positive unconditional: 47, negative: 60, negative conditional: 0, negative unconditional: 60, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 76497, positive: 70603, positive conditional: 0, positive unconditional: 70603, negative: 5423, negative conditional: 0, negative unconditional: 5423, unknown: 471, unknown conditional: 0, unknown unconditional: 471] , Statistics on independence cache: Total cache size (in pairs): 471, Positive cache size: 424, Positive conditional cache size: 0, Positive unconditional cache size: 424, Negative cache size: 47, Negative conditional cache size: 0, Negative unconditional cache size: 47, Independence queries for same thread: 9246 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 85004, positive: 70521, positive conditional: 70521, positive unconditional: 0, negative: 14483, negative conditional: 14483, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 75988, positive: 70521, positive conditional: 0, positive unconditional: 70521, negative: 5467, negative conditional: 0, negative unconditional: 5467, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 438, positive: 393, positive conditional: 0, positive unconditional: 393, negative: 45, negative conditional: 0, negative unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 438, positive: 359, positive conditional: 0, positive unconditional: 359, negative: 79, negative conditional: 0, negative unconditional: 79, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 79, positive: 34, positive conditional: 0, positive unconditional: 34, negative: 45, negative conditional: 0, negative unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 110, positive: 52, positive conditional: 0, positive unconditional: 52, negative: 57, negative conditional: 0, negative unconditional: 57, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 75988, positive: 70128, positive conditional: 0, positive unconditional: 70128, negative: 5422, negative conditional: 0, negative unconditional: 5422, unknown: 438, unknown conditional: 0, unknown unconditional: 438] , Statistics on independence cache: Total cache size (in pairs): 438, Positive cache size: 393, Positive conditional cache size: 0, Positive unconditional cache size: 393, Negative cache size: 45, Negative conditional cache size: 0, Negative unconditional cache size: 45, Independence queries for same thread: 9016 - PositiveResult [Line: 35]: 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 8 procedures, 53 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 519.5ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 36.8ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 478.8ms, PartialOrderReductionTime: 461.9ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=941occurred 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 8 procedures, 53 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5381.9ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 99.3ms, AutomataDifference: 1318.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1643.3ms, PartialOrderReductionTime: 1642.0ms, HoareTripleCheckerStatistics: 247 SDtfs, 277 SDslu, 310 SDs, 0 SdLazy, 261 SolverSat, 130 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 385.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 214.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6941occurred in iteration=0, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1553.5ms AutomataMinimizationTime, 6 MinimizatonAttempts, 2047 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 13.6ms SsaConstructionTime, 76.6ms SatisfiabilityAnalysisTime, 471.5ms InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 397 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: DeviceThreadThread1of1ForFork2 with 1 thread instances CFG has 8 procedures, 53 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2932.9ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 29.2ms, AutomataDifference: 581.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1349.0ms, PartialOrderReductionTime: 1345.4ms, HoareTripleCheckerStatistics: 245 SDtfs, 293 SDslu, 293 SDs, 0 SdLazy, 246 SolverSat, 137 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 211.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 139.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6761occurred in iteration=0, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 610.2ms AutomataMinimizationTime, 6 MinimizatonAttempts, 2042 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.2ms SsaConstructionTime, 23.8ms SatisfiabilityAnalysisTime, 291.2ms InterpolantComputationTime, 95 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 89 ConstructedInterpolants, 0 QuantifiedInterpolants, 361 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: DeviceThreadThread1of1ForFork3 with 1 thread instances CFG has 8 procedures, 53 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2295.0ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 32.1ms, AutomataDifference: 522.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1005.8ms, PartialOrderReductionTime: 1004.9ms, HoareTripleCheckerStatistics: 245 SDtfs, 310 SDslu, 335 SDs, 0 SdLazy, 282 SolverSat, 147 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 207.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 128.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6791occurred in iteration=0, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 484.3ms AutomataMinimizationTime, 6 MinimizatonAttempts, 2039 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 9.0ms SsaConstructionTime, 9.5ms SatisfiabilityAnalysisTime, 204.6ms InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 93 ConstructedInterpolants, 0 QuantifiedInterpolants, 376 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: DeviceThreadThread1of1ForFork1 with 1 thread instances CFG has 8 procedures, 53 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2283.2ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 23.7ms, AutomataDifference: 522.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 855.3ms, PartialOrderReductionTime: 854.6ms, HoareTripleCheckerStatistics: 246 SDtfs, 288 SDslu, 327 SDs, 0 SdLazy, 270 SolverSat, 130 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 193.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 117.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6755occurred in iteration=0, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 648.6ms AutomataMinimizationTime, 6 MinimizatonAttempts, 2100 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.1ms SsaConstructionTime, 15.2ms SatisfiabilityAnalysisTime, 190.9ms InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 86 ConstructedInterpolants, 0 QuantifiedInterpolants, 352 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...