/usr/bin/java -Xmx16000000000 -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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 07:17:20,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 07:17:20,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 07:17:20,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 07:17:20,758 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.epf [2021-06-05 07:17:20,785 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 07:17:20,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 07:17:20,785 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 07:17:20,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 07:17:20,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 07:17:20,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 07:17:20,787 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 07:17:20,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 07:17:20,787 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 07:17:20,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 07:17:20,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 07:17:20,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 07:17:20,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 07:17:20,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 07:17:20,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 07:17:20,788 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 07:17:20,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 07:17:20,789 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 07:17:20,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 07:17:20,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 07:17:20,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 07:17:20,789 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 07:17:20,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 07:17:20,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 07:17:20,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 07:17:20,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 07:17:20,789 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 07:17:20,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 07:17:20,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 07:17:20,790 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 07:17:20,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 07:17:20,790 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 07:17:21,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 07:17:21,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 07:17:21,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 07:17:21,046 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 07:17:21,047 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 07:17:21,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl [2021-06-05 07:17:21,048 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl' [2021-06-05 07:17:21,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 07:17:21,073 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 07:17:21,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 07:17:21,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 07:17:21,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 07:17:21,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:21" (1/1) ... [2021-06-05 07:17:21,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:21" (1/1) ... [2021-06-05 07:17:21,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 07:17:21,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 07:17:21,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 07:17:21,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 07:17:21,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:21" (1/1) ... [2021-06-05 07:17:21,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:21" (1/1) ... [2021-06-05 07:17:21,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:21" (1/1) ... [2021-06-05 07:17:21,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:21" (1/1) ... [2021-06-05 07:17:21,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:21" (1/1) ... [2021-06-05 07:17:21,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:21" (1/1) ... [2021-06-05 07:17:21,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:21" (1/1) ... [2021-06-05 07:17:21,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 07:17:21,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 07:17:21,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 07:17:21,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 07:17:21,110 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:21" (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 [2021-06-05 07:17:21,154 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 07:17:21,154 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 07:17:21,154 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 07:17:21,155 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 07:17:21,155 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 07:17:21,155 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 07:17:21,155 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 07:17:21,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 07:17:21,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 07:17:21,156 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 07:17:21,265 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 07:17:21,266 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 07:17:21,266 INFO L202 PluginConnector]: Adding new model easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:17:21 BoogieIcfgContainer [2021-06-05 07:17:21,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 07:17:21,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 07:17:21,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 07:17:21,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 07:17:21,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:17:21" (1/2) ... [2021-06-05 07:17:21,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59988df and model type easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 07:17:21, skipping insertion in model container [2021-06-05 07:17:21,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:17:21" (2/2) ... [2021-06-05 07:17:21,271 INFO L111 eAbstractionObserver]: Analyzing ICFG easy6.wvr.bpl [2021-06-05 07:17:21,275 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 07:17:21,275 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 07:17:21,275 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 07:17:21,276 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 07:17:21,296 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 07:17:21,310 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 07:17:21,322 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 07:17:21,322 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 07:17:21,322 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 07:17:21,322 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 07:17:21,322 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 07:17:21,322 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 07:17:21,322 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 07:17:21,322 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 07:17:21,329 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 35 transitions, 86 flow [2021-06-05 07:17:21,355 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 154 states, 152 states have (on average 1.7960526315789473) internal successors, (273), 153 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:21,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 154 states, 152 states have (on average 1.7960526315789473) internal successors, (273), 153 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:21,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:17:21,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:21,364 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:21,364 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:21,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:21,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1962782347, now seen corresponding path program 1 times [2021-06-05 07:17:21,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:21,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980646802] [2021-06-05 07:17:21,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:21,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:21,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980646802] [2021-06-05 07:17:21,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980646802] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:21,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:21,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 07:17:21,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519576941] [2021-06-05 07:17:21,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:17:21,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:21,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:17:21,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:17:21,545 INFO L87 Difference]: Start difference. First operand has 154 states, 152 states have (on average 1.7960526315789473) internal successors, (273), 153 states have internal predecessors, (273), 0 states have call successors, (0), 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 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:21,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:21,630 INFO L93 Difference]: Finished difference Result 202 states and 341 transitions. [2021-06-05 07:17:21,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:17:21,632 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-06-05 07:17:21,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:21,638 INFO L225 Difference]: With dead ends: 202 [2021-06-05 07:17:21,638 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 07:17:21,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:17:21,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 07:17:21,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 121. [2021-06-05 07:17:21,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.7416666666666667) internal successors, (209), 120 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:21,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 209 transitions. [2021-06-05 07:17:21,667 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 209 transitions. Word has length 31 [2021-06-05 07:17:21,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:21,668 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 209 transitions. [2021-06-05 07:17:21,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:21,668 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 209 transitions. [2021-06-05 07:17:21,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:17:21,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:21,669 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:21,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 07:17:21,670 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:21,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:21,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1150170667, now seen corresponding path program 2 times [2021-06-05 07:17:21,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:21,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842820544] [2021-06-05 07:17:21,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:21,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:21,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842820544] [2021-06-05 07:17:21,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842820544] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:21,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:21,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 07:17:21,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236861968] [2021-06-05 07:17:21,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:17:21,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:21,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:17:21,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:17:21,722 INFO L87 Difference]: Start difference. First operand 121 states and 209 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:21,801 INFO L93 Difference]: Finished difference Result 228 states and 387 transitions. [2021-06-05 07:17:21,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:17:21,807 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-06-05 07:17:21,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:21,809 INFO L225 Difference]: With dead ends: 228 [2021-06-05 07:17:21,809 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 07:17:21,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:17:21,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 07:17:21,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 106. [2021-06-05 07:17:21,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.7047619047619047) internal successors, (179), 105 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:21,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 179 transitions. [2021-06-05 07:17:21,823 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 179 transitions. Word has length 31 [2021-06-05 07:17:21,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:21,824 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 179 transitions. [2021-06-05 07:17:21,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:21,824 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 179 transitions. [2021-06-05 07:17:21,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:17:21,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:21,825 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:21,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 07:17:21,825 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:21,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:21,826 INFO L82 PathProgramCache]: Analyzing trace with hash 628560125, now seen corresponding path program 3 times [2021-06-05 07:17:21,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:21,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075691223] [2021-06-05 07:17:21,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:21,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:21,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075691223] [2021-06-05 07:17:21,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075691223] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:21,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:21,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 07:17:21,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747249216] [2021-06-05 07:17:21,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 07:17:21,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:21,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 07:17:21,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 07:17:21,842 INFO L87 Difference]: Start difference. First operand 106 states and 179 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:21,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:21,846 INFO L93 Difference]: Finished difference Result 100 states and 167 transitions. [2021-06-05 07:17:21,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 07:17:21,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-06-05 07:17:21,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:21,847 INFO L225 Difference]: With dead ends: 100 [2021-06-05 07:17:21,848 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 07:17:21,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 07:17:21,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 07:17:21,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-06-05 07:17:21,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.6868686868686869) internal successors, (167), 99 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:21,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 167 transitions. [2021-06-05 07:17:21,854 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 167 transitions. Word has length 31 [2021-06-05 07:17:21,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:21,854 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 167 transitions. [2021-06-05 07:17:21,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:21,854 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 167 transitions. [2021-06-05 07:17:21,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:17:21,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:21,855 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:21,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 07:17:21,855 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:21,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:21,856 INFO L82 PathProgramCache]: Analyzing trace with hash -88600699, now seen corresponding path program 4 times [2021-06-05 07:17:21,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:21,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690669704] [2021-06-05 07:17:21,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:21,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:21,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690669704] [2021-06-05 07:17:21,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690669704] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:21,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:21,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 07:17:21,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536221178] [2021-06-05 07:17:21,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:17:21,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:21,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:17:21,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:17:21,942 INFO L87 Difference]: Start difference. First operand 100 states and 167 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:22,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:22,024 INFO L93 Difference]: Finished difference Result 131 states and 210 transitions. [2021-06-05 07:17:22,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:17:22,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-06-05 07:17:22,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:22,026 INFO L225 Difference]: With dead ends: 131 [2021-06-05 07:17:22,026 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 07:17:22,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:17:22,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 07:17:22,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2021-06-05 07:17:22,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.6025641025641026) internal successors, (125), 78 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:22,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 125 transitions. [2021-06-05 07:17:22,042 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 125 transitions. Word has length 31 [2021-06-05 07:17:22,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:22,043 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 125 transitions. [2021-06-05 07:17:22,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:22,043 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 125 transitions. [2021-06-05 07:17:22,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:17:22,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:22,044 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:22,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 07:17:22,044 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:22,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:22,044 INFO L82 PathProgramCache]: Analyzing trace with hash 538045003, now seen corresponding path program 5 times [2021-06-05 07:17:22,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:22,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960610030] [2021-06-05 07:17:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:22,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:22,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960610030] [2021-06-05 07:17:22,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960610030] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:22,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:22,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-05 07:17:22,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90649658] [2021-06-05 07:17:22,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:17:22,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:22,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:17:22,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:17:22,123 INFO L87 Difference]: Start difference. First operand 79 states and 125 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:22,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:22,236 INFO L93 Difference]: Finished difference Result 214 states and 334 transitions. [2021-06-05 07:17:22,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:17:22,237 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-06-05 07:17:22,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:22,238 INFO L225 Difference]: With dead ends: 214 [2021-06-05 07:17:22,238 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 07:17:22,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:17:22,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 07:17:22,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 90. [2021-06-05 07:17:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.595505617977528) internal successors, (142), 89 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:22,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 142 transitions. [2021-06-05 07:17:22,246 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 142 transitions. Word has length 31 [2021-06-05 07:17:22,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:22,247 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 142 transitions. [2021-06-05 07:17:22,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:22,248 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 142 transitions. [2021-06-05 07:17:22,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:17:22,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:22,251 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:22,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 07:17:22,251 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:22,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:22,252 INFO L82 PathProgramCache]: Analyzing trace with hash 593498699, now seen corresponding path program 6 times [2021-06-05 07:17:22,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:22,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478235801] [2021-06-05 07:17:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:22,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:22,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478235801] [2021-06-05 07:17:22,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478235801] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:22,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:22,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-05 07:17:22,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454254553] [2021-06-05 07:17:22,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:17:22,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:22,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:17:22,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:17:22,349 INFO L87 Difference]: Start difference. First operand 90 states and 142 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:22,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:22,452 INFO L93 Difference]: Finished difference Result 201 states and 310 transitions. [2021-06-05 07:17:22,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:17:22,452 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-06-05 07:17:22,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:22,453 INFO L225 Difference]: With dead ends: 201 [2021-06-05 07:17:22,454 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 07:17:22,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:17:22,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 07:17:22,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 80. [2021-06-05 07:17:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.5949367088607596) internal successors, (126), 79 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 126 transitions. [2021-06-05 07:17:22,463 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 126 transitions. Word has length 31 [2021-06-05 07:17:22,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:22,463 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 126 transitions. [2021-06-05 07:17:22,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 126 transitions. [2021-06-05 07:17:22,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:17:22,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:22,468 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:22,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 07:17:22,471 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:22,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:22,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1972958505, now seen corresponding path program 7 times [2021-06-05 07:17:22,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:22,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474354055] [2021-06-05 07:17:22,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:22,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:22,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474354055] [2021-06-05 07:17:22,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474354055] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:22,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:22,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-05 07:17:22,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410210336] [2021-06-05 07:17:22,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:17:22,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:22,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:17:22,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:17:22,551 INFO L87 Difference]: Start difference. First operand 80 states and 126 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:22,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:22,665 INFO L93 Difference]: Finished difference Result 200 states and 309 transitions. [2021-06-05 07:17:22,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:17:22,666 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-06-05 07:17:22,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:22,666 INFO L225 Difference]: With dead ends: 200 [2021-06-05 07:17:22,666 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 07:17:22,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:17:22,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 07:17:22,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 91. [2021-06-05 07:17:22,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.6) internal successors, (144), 90 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:22,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 144 transitions. [2021-06-05 07:17:22,669 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 144 transitions. Word has length 31 [2021-06-05 07:17:22,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:22,669 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 144 transitions. [2021-06-05 07:17:22,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:22,669 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 144 transitions. [2021-06-05 07:17:22,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:17:22,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:22,669 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:22,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 07:17:22,669 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:22,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2028412201, now seen corresponding path program 8 times [2021-06-05 07:17:22,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:22,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857581071] [2021-06-05 07:17:22,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:22,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:22,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857581071] [2021-06-05 07:17:22,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857581071] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:22,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:22,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-05 07:17:22,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138306288] [2021-06-05 07:17:22,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:17:22,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:22,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:17:22,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:17:22,758 INFO L87 Difference]: Start difference. First operand 91 states and 144 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:22,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:22,861 INFO L93 Difference]: Finished difference Result 187 states and 285 transitions. [2021-06-05 07:17:22,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:17:22,862 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-06-05 07:17:22,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:22,863 INFO L225 Difference]: With dead ends: 187 [2021-06-05 07:17:22,863 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 07:17:22,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:17:22,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 07:17:22,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 83. [2021-06-05 07:17:22,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.5731707317073171) internal successors, (129), 82 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:22,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 129 transitions. [2021-06-05 07:17:22,865 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 129 transitions. Word has length 31 [2021-06-05 07:17:22,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:22,865 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 129 transitions. [2021-06-05 07:17:22,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:22,866 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 129 transitions. [2021-06-05 07:17:22,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:17:22,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:22,866 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:22,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 07:17:22,866 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:22,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:22,866 INFO L82 PathProgramCache]: Analyzing trace with hash 440382761, now seen corresponding path program 9 times [2021-06-05 07:17:22,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:22,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547966303] [2021-06-05 07:17:22,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:22,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:22,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547966303] [2021-06-05 07:17:22,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547966303] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:22,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:22,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 07:17:22,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156501247] [2021-06-05 07:17:22,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 07:17:22,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:22,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 07:17:22,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 07:17:22,876 INFO L87 Difference]: Start difference. First operand 83 states and 129 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:22,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:22,879 INFO L93 Difference]: Finished difference Result 82 states and 124 transitions. [2021-06-05 07:17:22,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 07:17:22,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-06-05 07:17:22,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:22,879 INFO L225 Difference]: With dead ends: 82 [2021-06-05 07:17:22,879 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 07:17:22,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 07:17:22,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 07:17:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-06-05 07:17:22,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.5466666666666666) internal successors, (116), 75 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:22,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 116 transitions. [2021-06-05 07:17:22,881 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 116 transitions. Word has length 31 [2021-06-05 07:17:22,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:22,881 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 116 transitions. [2021-06-05 07:17:22,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:22,881 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 116 transitions. [2021-06-05 07:17:22,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:17:22,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:22,881 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:22,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 07:17:22,882 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:22,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:22,882 INFO L82 PathProgramCache]: Analyzing trace with hash 205229245, now seen corresponding path program 10 times [2021-06-05 07:17:22,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:22,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731922846] [2021-06-05 07:17:22,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:22,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:22,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731922846] [2021-06-05 07:17:22,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731922846] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:22,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:22,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-05 07:17:22,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904195750] [2021-06-05 07:17:22,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:17:22,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:22,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:17:22,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:17:22,969 INFO L87 Difference]: Start difference. First operand 76 states and 116 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:23,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:23,059 INFO L93 Difference]: Finished difference Result 98 states and 150 transitions. [2021-06-05 07:17:23,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:17:23,059 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-06-05 07:17:23,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:23,060 INFO L225 Difference]: With dead ends: 98 [2021-06-05 07:17:23,060 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 07:17:23,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:17:23,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 07:17:23,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2021-06-05 07:17:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.5365853658536586) internal successors, (126), 82 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 126 transitions. [2021-06-05 07:17:23,061 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 126 transitions. Word has length 31 [2021-06-05 07:17:23,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:23,062 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 126 transitions. [2021-06-05 07:17:23,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:23,062 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 126 transitions. [2021-06-05 07:17:23,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:17:23,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:23,062 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:23,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 07:17:23,062 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:23,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:23,063 INFO L82 PathProgramCache]: Analyzing trace with hash 260682941, now seen corresponding path program 11 times [2021-06-05 07:17:23,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:23,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570282812] [2021-06-05 07:17:23,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:23,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:23,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:23,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570282812] [2021-06-05 07:17:23,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570282812] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:23,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:23,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-05 07:17:23,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544323333] [2021-06-05 07:17:23,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:17:23,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:23,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:17:23,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:17:23,110 INFO L87 Difference]: Start difference. First operand 83 states and 126 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:23,188 INFO L93 Difference]: Finished difference Result 87 states and 130 transitions. [2021-06-05 07:17:23,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:17:23,189 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-06-05 07:17:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:23,189 INFO L225 Difference]: With dead ends: 87 [2021-06-05 07:17:23,189 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 07:17:23,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:17:23,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 07:17:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-06-05 07:17:23,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.5342465753424657) internal successors, (112), 73 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:23,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 112 transitions. [2021-06-05 07:17:23,191 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 112 transitions. Word has length 31 [2021-06-05 07:17:23,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:23,191 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 112 transitions. [2021-06-05 07:17:23,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:23,191 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 112 transitions. [2021-06-05 07:17:23,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:17:23,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:23,191 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:23,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 07:17:23,191 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:23,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:23,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1640142747, now seen corresponding path program 12 times [2021-06-05 07:17:23,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:23,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664556782] [2021-06-05 07:17:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:23,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:23,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664556782] [2021-06-05 07:17:23,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664556782] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:23,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:23,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-05 07:17:23,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819885328] [2021-06-05 07:17:23,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:17:23,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:23,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:17:23,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:17:23,243 INFO L87 Difference]: Start difference. First operand 74 states and 112 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:23,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:23,327 INFO L93 Difference]: Finished difference Result 104 states and 159 transitions. [2021-06-05 07:17:23,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:17:23,327 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-06-05 07:17:23,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:23,328 INFO L225 Difference]: With dead ends: 104 [2021-06-05 07:17:23,328 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 07:17:23,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:17:23,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 07:17:23,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2021-06-05 07:17:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.524390243902439) internal successors, (125), 82 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:23,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 125 transitions. [2021-06-05 07:17:23,330 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 125 transitions. Word has length 31 [2021-06-05 07:17:23,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:23,330 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 125 transitions. [2021-06-05 07:17:23,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:23,330 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 125 transitions. [2021-06-05 07:17:23,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:17:23,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:23,330 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:23,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 07:17:23,330 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:23,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1695596443, now seen corresponding path program 13 times [2021-06-05 07:17:23,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:23,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812555982] [2021-06-05 07:17:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:23,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:23,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:23,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812555982] [2021-06-05 07:17:23,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812555982] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:23,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:23,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-05 07:17:23,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841289643] [2021-06-05 07:17:23,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:17:23,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:23,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:17:23,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:17:23,381 INFO L87 Difference]: Start difference. First operand 83 states and 125 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:23,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:23,459 INFO L93 Difference]: Finished difference Result 87 states and 129 transitions. [2021-06-05 07:17:23,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:17:23,460 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-06-05 07:17:23,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:23,460 INFO L225 Difference]: With dead ends: 87 [2021-06-05 07:17:23,460 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 07:17:23,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:17:23,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 07:17:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-06-05 07:17:23,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.5277777777777777) internal successors, (110), 72 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 110 transitions. [2021-06-05 07:17:23,463 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 110 transitions. Word has length 31 [2021-06-05 07:17:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:23,463 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 110 transitions. [2021-06-05 07:17:23,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:23,464 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 110 transitions. [2021-06-05 07:17:23,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 07:17:23,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:23,464 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:23,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 07:17:23,464 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:23,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:23,465 INFO L82 PathProgramCache]: Analyzing trace with hash -127865327, now seen corresponding path program 14 times [2021-06-05 07:17:23,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:23,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043967918] [2021-06-05 07:17:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:23,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:23,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043967918] [2021-06-05 07:17:23,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043967918] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:17:23,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:17:23,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 07:17:23,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97573862] [2021-06-05 07:17:23,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:17:23,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:23,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:17:23,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:17:23,532 INFO L87 Difference]: Start difference. First operand 73 states and 110 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:23,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:23,563 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2021-06-05 07:17:23,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:17:23,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-06-05 07:17:23,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:23,563 INFO L225 Difference]: With dead ends: 43 [2021-06-05 07:17:23,563 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 07:17:23,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:17:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 07:17:23,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 07:17:23,564 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) [2021-06-05 07:17:23,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 07:17:23,564 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-06-05 07:17:23,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:23,564 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 07:17:23,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:23,564 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 07:17:23,564 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 07:17:23,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 07:17:23,566 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 07:17:23,567 INFO L202 PluginConnector]: Adding new model easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 07:17:23 BasicIcfg [2021-06-05 07:17:23,568 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 07:17:23,568 INFO L168 Benchmark]: Toolchain (without parser) took 2495.17 ms. Allocated memory is still 343.9 MB. Free memory was 324.0 MB in the beginning and 179.2 MB in the end (delta: 144.8 MB). Peak memory consumption was 144.1 MB. Max. memory is 16.0 GB. [2021-06-05 07:17:23,568 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 343.9 MB. Free memory was 325.1 MB in the beginning and 325.0 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:17:23,568 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.03 ms. Allocated memory is still 343.9 MB. Free memory was 323.9 MB in the beginning and 322.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 07:17:23,568 INFO L168 Benchmark]: Boogie Preprocessor took 9.03 ms. Allocated memory is still 343.9 MB. Free memory was 322.4 MB in the beginning and 321.6 MB in the end (delta: 813.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:17:23,569 INFO L168 Benchmark]: RCFGBuilder took 158.89 ms. Allocated memory is still 343.9 MB. Free memory was 321.5 MB in the beginning and 310.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 07:17:23,569 INFO L168 Benchmark]: TraceAbstraction took 2299.91 ms. Allocated memory is still 343.9 MB. Free memory was 309.5 MB in the beginning and 179.2 MB in the end (delta: 130.3 MB). Peak memory consumption was 129.4 MB. Max. memory is 16.0 GB. [2021-06-05 07:17:23,569 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 343.9 MB. Free memory was 325.1 MB in the beginning and 325.0 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.03 ms. Allocated memory is still 343.9 MB. Free memory was 323.9 MB in the beginning and 322.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.03 ms. Allocated memory is still 343.9 MB. Free memory was 322.4 MB in the beginning and 321.6 MB in the end (delta: 813.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 158.89 ms. Allocated memory is still 343.9 MB. Free memory was 321.5 MB in the beginning and 310.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2299.91 ms. Allocated memory is still 343.9 MB. Free memory was 309.5 MB in the beginning and 179.2 MB in the end (delta: 130.3 MB). Peak memory consumption was 129.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 60]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 60 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2244.8ms, OverallIterations: 14, TraceHistogramMax: 1, EmptinessCheckTime: 20.8ms, AutomataDifference: 1108.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 32.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 540 SDtfs, 1474 SDslu, 1453 SDs, 0 SdLazy, 531 SolverSat, 185 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 311.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1009.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=0, InterpolantAutomatonStates: 114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 81.3ms AutomataMinimizationTime, 14 MinimizatonAttempts, 583 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 22.8ms SsaConstructionTime, 67.4ms SatisfiabilityAnalysisTime, 780.1ms InterpolantComputationTime, 434 NumberOfCodeBlocks, 434 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 420 ConstructedInterpolants, 0 QuantifiedInterpolants, 1626 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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...