/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/chl/poker-hand-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 04:47:41,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 04:47:41,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 04:47:41,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 04:47:41,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 04:47:41,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 04:47:41,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 04:47:41,629 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 04:47:41,654 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 04:47:41,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 04:47:41,654 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 04:47:41,654 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 04:47:41,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 04:47:41,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 04:47:41,655 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 04:47:41,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 04:47:41,655 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 04:47:41,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 04:47:41,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 04:47:41,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 04:47:41,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 04:47:41,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 04:47:41,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 04:47:41,656 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 04:47:41,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 04:47:41,656 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 04:47:41,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 04:47:41,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 04:47:41,656 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 04:47:41,656 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 04:47:41,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 04:47:41,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 04:47:41,657 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 04:47:41,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 04:47:41,657 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 04:47:41,657 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 04:47:41,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 04:47:41,657 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 04:47:41,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 04:47:41,657 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 04:47:41,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 04:47:41,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 04:47:41,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 04:47:41,870 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 04:47:41,872 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 04:47:41,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl [2021-06-05 04:47:41,887 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl' [2021-06-05 04:47:41,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 04:47:41,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 04:47:41,940 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 04:47:41,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 04:47:41,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 04:47:41,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:47:41" (1/1) ... [2021-06-05 04:47:41,970 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:47:41" (1/1) ... [2021-06-05 04:47:41,975 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 04:47:41,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 04:47:41,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 04:47:41,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 04:47:41,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:47:41" (1/1) ... [2021-06-05 04:47:41,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:47:41" (1/1) ... [2021-06-05 04:47:41,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:47:41" (1/1) ... [2021-06-05 04:47:41,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:47:41" (1/1) ... [2021-06-05 04:47:42,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:47:41" (1/1) ... [2021-06-05 04:47:42,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:47:41" (1/1) ... [2021-06-05 04:47:42,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:47:41" (1/1) ... [2021-06-05 04:47:42,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 04:47:42,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 04:47:42,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 04:47:42,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 04:47:42,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:47:41" (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 04:47:42,069 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 04:47:42,069 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 04:47:42,069 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 04:47:42,069 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 04:47:42,069 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 04:47:42,070 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 04:47:42,070 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 04:47:42,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 04:47:42,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 04:47:42,070 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 04:47:42,540 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 04:47:42,540 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-05 04:47:42,541 INFO L202 PluginConnector]: Adding new model poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:47:42 BoogieIcfgContainer [2021-06-05 04:47:42,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 04:47:42,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 04:47:42,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 04:47:42,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 04:47:42,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:47:41" (1/2) ... [2021-06-05 04:47:42,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427c1d28 and model type poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:47:42, skipping insertion in model container [2021-06-05 04:47:42,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:47:42" (2/2) ... [2021-06-05 04:47:42,546 INFO L111 eAbstractionObserver]: Analyzing ICFG poker-hand-symm.wvr.bpl [2021-06-05 04:47:42,549 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 04:47:42,549 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 04:47:42,549 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 04:47:42,550 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 04:47:42,580 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 04:47:42,594 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 04:47:42,606 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 04:47:42,607 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 04:47:42,607 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 04:47:42,607 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 04:47:42,607 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 04:47:42,607 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 04:47:42,607 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 04:47:42,607 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 04:47:42,612 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 26 transitions, 68 flow [2021-06-05 04:47:42,619 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 41 states, 39 states have (on average 2.871794871794872) internal successors, (112), 40 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 04:47:42,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 39 states have (on average 2.871794871794872) internal successors, (112), 40 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 04:47:42,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:47:42,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:42,624 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:42,625 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:42,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:42,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1990166855, now seen corresponding path program 1 times [2021-06-05 04:47:42,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:42,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557375712] [2021-06-05 04:47:42,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:43,214 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 121 [2021-06-05 04:47:43,651 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 92 [2021-06-05 04:47:44,003 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 48 [2021-06-05 04:47:44,069 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 04:47:44,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:44,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557375712] [2021-06-05 04:47:44,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557375712] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:47:44,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:47:44,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:47:44,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627851425] [2021-06-05 04:47:44,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:47:44,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:44,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:47:44,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:47:44,086 INFO L87 Difference]: Start difference. First operand has 41 states, 39 states have (on average 2.871794871794872) internal successors, (112), 40 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) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:44,306 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 04:47:44,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:44,329 INFO L93 Difference]: Finished difference Result 66 states and 158 transitions. [2021-06-05 04:47:44,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:47:44,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 04:47:44,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:44,338 INFO L225 Difference]: With dead ends: 66 [2021-06-05 04:47:44,338 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 04:47:44,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 611.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:47:44,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 04:47:44,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2021-06-05 04:47:44,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.813953488372093) internal successors, (121), 43 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 04:47:44,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 121 transitions. [2021-06-05 04:47:44,370 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 121 transitions. Word has length 10 [2021-06-05 04:47:44,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:44,371 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 121 transitions. [2021-06-05 04:47:44,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:44,371 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 121 transitions. [2021-06-05 04:47:44,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:47:44,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:44,373 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:44,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 04:47:44,373 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:44,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:44,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1977673933, now seen corresponding path program 2 times [2021-06-05 04:47:44,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:44,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253301140] [2021-06-05 04:47:44,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:44,747 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2021-06-05 04:47:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:44,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:44,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253301140] [2021-06-05 04:47:44,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253301140] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:47:44,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:47:44,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:47:44,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715844018] [2021-06-05 04:47:44,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:47:44,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:44,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:47:44,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:47:44,802 INFO L87 Difference]: Start difference. First operand 44 states and 121 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:44,961 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 04:47:44,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:44,982 INFO L93 Difference]: Finished difference Result 66 states and 156 transitions. [2021-06-05 04:47:44,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:47:44,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 04:47:44,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:44,983 INFO L225 Difference]: With dead ends: 66 [2021-06-05 04:47:44,983 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 04:47:44,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 405.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:47:44,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 04:47:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2021-06-05 04:47:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.8) internal successors, (126), 45 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 04:47:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 126 transitions. [2021-06-05 04:47:44,988 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 126 transitions. Word has length 10 [2021-06-05 04:47:44,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:44,988 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 126 transitions. [2021-06-05 04:47:44,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:44,988 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 126 transitions. [2021-06-05 04:47:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:47:44,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:44,988 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:44,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 04:47:44,989 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:44,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:44,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1880928136, now seen corresponding path program 1 times [2021-06-05 04:47:44,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:44,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979788798] [2021-06-05 04:47:44,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:45,032 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 04:47:45,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:45,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979788798] [2021-06-05 04:47:45,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979788798] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:47:45,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:47:45,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:47:45,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478387029] [2021-06-05 04:47:45,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:47:45,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:45,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:47:45,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:47:45,035 INFO L87 Difference]: Start difference. First operand 46 states and 126 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:45,045 INFO L93 Difference]: Finished difference Result 52 states and 141 transitions. [2021-06-05 04:47:45,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:47:45,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:47:45,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:45,047 INFO L225 Difference]: With dead ends: 52 [2021-06-05 04:47:45,047 INFO L226 Difference]: Without dead ends: 52 [2021-06-05 04:47:45,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:47:45,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-05 04:47:45,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-06-05 04:47:45,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.764705882352941) internal successors, (141), 51 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 04:47:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 141 transitions. [2021-06-05 04:47:45,051 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 141 transitions. Word has length 11 [2021-06-05 04:47:45,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:45,051 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 141 transitions. [2021-06-05 04:47:45,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,051 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 141 transitions. [2021-06-05 04:47:45,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:47:45,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:45,052 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:45,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 04:47:45,052 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:45,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:45,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1648216420, now seen corresponding path program 1 times [2021-06-05 04:47:45,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:45,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141971333] [2021-06-05 04:47:45,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:45,062 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 04:47:45,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:45,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141971333] [2021-06-05 04:47:45,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141971333] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:47:45,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:47:45,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:47:45,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010716739] [2021-06-05 04:47:45,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:47:45,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:45,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:47:45,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:47:45,063 INFO L87 Difference]: Start difference. First operand 52 states and 141 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:45,067 INFO L93 Difference]: Finished difference Result 58 states and 156 transitions. [2021-06-05 04:47:45,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:47:45,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:47:45,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:45,068 INFO L225 Difference]: With dead ends: 58 [2021-06-05 04:47:45,068 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 04:47:45,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:47:45,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 04:47:45,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-06-05 04:47:45,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.736842105263158) internal successors, (156), 57 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 04:47:45,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 156 transitions. [2021-06-05 04:47:45,072 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 156 transitions. Word has length 11 [2021-06-05 04:47:45,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:45,072 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 156 transitions. [2021-06-05 04:47:45,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,072 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 156 transitions. [2021-06-05 04:47:45,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:47:45,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:45,073 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:45,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 04:47:45,073 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:45,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:45,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1504532924, now seen corresponding path program 1 times [2021-06-05 04:47:45,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:45,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899814024] [2021-06-05 04:47:45,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:45,085 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 04:47:45,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:45,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899814024] [2021-06-05 04:47:45,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899814024] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:47:45,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:47:45,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:47:45,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620649616] [2021-06-05 04:47:45,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:47:45,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:45,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:47:45,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:47:45,086 INFO L87 Difference]: Start difference. First operand 58 states and 156 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:45,092 INFO L93 Difference]: Finished difference Result 66 states and 175 transitions. [2021-06-05 04:47:45,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:47:45,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:47:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:45,094 INFO L225 Difference]: With dead ends: 66 [2021-06-05 04:47:45,094 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 04:47:45,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:47:45,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 04:47:45,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-06-05 04:47:45,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.6923076923076925) internal successors, (175), 65 states have internal predecessors, (175), 0 states have call successors, (0), 0 states 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 04:47:45,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 175 transitions. [2021-06-05 04:47:45,100 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 175 transitions. Word has length 11 [2021-06-05 04:47:45,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:45,100 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 175 transitions. [2021-06-05 04:47:45,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,100 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 175 transitions. [2021-06-05 04:47:45,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:47:45,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:45,101 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:45,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 04:47:45,101 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:45,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:45,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1535932638, now seen corresponding path program 1 times [2021-06-05 04:47:45,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:45,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307230768] [2021-06-05 04:47:45,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:45,114 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 04:47:45,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:45,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307230768] [2021-06-05 04:47:45,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307230768] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:47:45,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:47:45,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:47:45,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484656553] [2021-06-05 04:47:45,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:47:45,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:45,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:47:45,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:47:45,116 INFO L87 Difference]: Start difference. First operand 66 states and 175 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:45,122 INFO L93 Difference]: Finished difference Result 74 states and 194 transitions. [2021-06-05 04:47:45,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:47:45,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:47:45,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:45,124 INFO L225 Difference]: With dead ends: 74 [2021-06-05 04:47:45,124 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 04:47:45,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:47:45,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 04:47:45,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-06-05 04:47:45,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.6575342465753424) internal successors, (194), 73 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 04:47:45,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 194 transitions. [2021-06-05 04:47:45,134 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 194 transitions. Word has length 11 [2021-06-05 04:47:45,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:45,135 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 194 transitions. [2021-06-05 04:47:45,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,139 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 194 transitions. [2021-06-05 04:47:45,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:47:45,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:45,140 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:45,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 04:47:45,140 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:45,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:45,141 INFO L82 PathProgramCache]: Analyzing trace with hash -375396698, now seen corresponding path program 1 times [2021-06-05 04:47:45,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:45,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584591580] [2021-06-05 04:47:45,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:47:45,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:45,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584591580] [2021-06-05 04:47:45,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584591580] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:47:45,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:47:45,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:47:45,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992053113] [2021-06-05 04:47:45,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:47:45,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:45,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:47:45,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:47:45,168 INFO L87 Difference]: Start difference. First operand 74 states and 194 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:45,184 INFO L93 Difference]: Finished difference Result 100 states and 228 transitions. [2021-06-05 04:47:45,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:47:45,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:47:45,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:45,186 INFO L225 Difference]: With dead ends: 100 [2021-06-05 04:47:45,186 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 04:47:45,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:47:45,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 04:47:45,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2021-06-05 04:47:45,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.4625) internal successors, (197), 80 states have internal predecessors, (197), 0 states have call successors, (0), 0 states 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 04:47:45,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2021-06-05 04:47:45,199 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 12 [2021-06-05 04:47:45,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:45,199 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2021-06-05 04:47:45,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,199 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2021-06-05 04:47:45,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:47:45,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:45,200 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:45,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 04:47:45,200 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:45,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:45,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1248628485, now seen corresponding path program 1 times [2021-06-05 04:47:45,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:45,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739715107] [2021-06-05 04:47:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:47:45,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:45,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739715107] [2021-06-05 04:47:45,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739715107] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:47:45,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:47:45,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:47:45,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431801305] [2021-06-05 04:47:45,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:47:45,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:45,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:47:45,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:47:45,229 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:45,248 INFO L93 Difference]: Finished difference Result 82 states and 165 transitions. [2021-06-05 04:47:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:47:45,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:47:45,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:45,249 INFO L225 Difference]: With dead ends: 82 [2021-06-05 04:47:45,249 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 04:47:45,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:47:45,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 04:47:45,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2021-06-05 04:47:45,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.1527777777777777) internal successors, (155), 72 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 04:47:45,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 155 transitions. [2021-06-05 04:47:45,255 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 155 transitions. Word has length 12 [2021-06-05 04:47:45,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:45,255 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 155 transitions. [2021-06-05 04:47:45,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,255 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 155 transitions. [2021-06-05 04:47:45,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:47:45,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:45,255 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:45,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 04:47:45,256 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:45,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:45,256 INFO L82 PathProgramCache]: Analyzing trace with hash -579329596, now seen corresponding path program 1 times [2021-06-05 04:47:45,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:45,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112997240] [2021-06-05 04:47:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:47:45,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:45,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112997240] [2021-06-05 04:47:45,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112997240] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:47:45,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:47:45,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:47:45,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366304959] [2021-06-05 04:47:45,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:47:45,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:45,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:47:45,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:47:45,289 INFO L87 Difference]: Start difference. First operand 73 states and 155 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:45,298 INFO L93 Difference]: Finished difference Result 82 states and 160 transitions. [2021-06-05 04:47:45,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:47:45,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:47:45,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:45,299 INFO L225 Difference]: With dead ends: 82 [2021-06-05 04:47:45,299 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 04:47:45,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:47:45,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 04:47:45,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-06-05 04:47:45,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 65 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 04:47:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 139 transitions. [2021-06-05 04:47:45,301 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 139 transitions. Word has length 12 [2021-06-05 04:47:45,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:45,301 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 139 transitions. [2021-06-05 04:47:45,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,301 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 139 transitions. [2021-06-05 04:47:45,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:47:45,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:45,303 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:45,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 04:47:45,303 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:45,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:45,304 INFO L82 PathProgramCache]: Analyzing trace with hash 339573799, now seen corresponding path program 1 times [2021-06-05 04:47:45,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:45,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009932417] [2021-06-05 04:47:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:47:45,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:45,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009932417] [2021-06-05 04:47:45,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009932417] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:47:45,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:47:45,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:47:45,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453487005] [2021-06-05 04:47:45,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:47:45,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:45,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:47:45,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:47:45,346 INFO L87 Difference]: Start difference. First operand 66 states and 139 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:45,363 INFO L93 Difference]: Finished difference Result 82 states and 155 transitions. [2021-06-05 04:47:45,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:47:45,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:47:45,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:45,364 INFO L225 Difference]: With dead ends: 82 [2021-06-05 04:47:45,364 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 04:47:45,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:47:45,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 04:47:45,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2021-06-05 04:47:45,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 04:47:45,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 136 transitions. [2021-06-05 04:47:45,366 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 136 transitions. Word has length 12 [2021-06-05 04:47:45,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:45,367 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 136 transitions. [2021-06-05 04:47:45,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:45,367 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 136 transitions. [2021-06-05 04:47:45,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:47:45,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:45,369 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:45,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 04:47:45,369 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:45,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:45,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1848204445, now seen corresponding path program 1 times [2021-06-05 04:47:45,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:45,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848351256] [2021-06-05 04:47:45,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:45,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:45,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848351256] [2021-06-05 04:47:45,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848351256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:45,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638642544] [2021-06-05 04:47:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:45,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:47:45,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:46,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638642544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:46,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:46,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:47:46,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385984322] [2021-06-05 04:47:46,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:47:46,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:46,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:47:46,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:47:46,137 INFO L87 Difference]: Start difference. First operand 66 states and 136 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 04:47:46,453 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-06-05 04:47:46,613 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-06-05 04:47:46,780 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2021-06-05 04:47:46,939 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-05 04:47:47,110 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-06-05 04:47:47,402 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-05 04:47:47,570 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-06-05 04:47:47,864 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-06-05 04:47:47,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:47,897 INFO L93 Difference]: Finished difference Result 133 states and 272 transitions. [2021-06-05 04:47:47,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:47:47,897 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:47:47,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:47,898 INFO L225 Difference]: With dead ends: 133 [2021-06-05 04:47:47,898 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 04:47:47,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1966.7ms TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:47:47,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 04:47:47,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 78. [2021-06-05 04:47:47,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states 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 04:47:47,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-06-05 04:47:47,900 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 14 [2021-06-05 04:47:47,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:47,901 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-06-05 04:47:47,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 04:47:47,901 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-06-05 04:47:47,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:47:47,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:47,901 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:48,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 04:47:48,118 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:48,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:48,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1124293829, now seen corresponding path program 2 times [2021-06-05 04:47:48,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:48,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510843282] [2021-06-05 04:47:48,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:48,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:48,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510843282] [2021-06-05 04:47:48,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510843282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:48,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349989456] [2021-06-05 04:47:48,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:48,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:48,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:48,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:47:48,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:48,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349989456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:48,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:48,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:47:48,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851053728] [2021-06-05 04:47:48,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:47:48,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:48,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:47:48,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:47:48,679 INFO L87 Difference]: Start difference. First operand 78 states and 162 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 04:47:49,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:49,005 INFO L93 Difference]: Finished difference Result 105 states and 213 transitions. [2021-06-05 04:47:49,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:47:49,005 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:47:49,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:49,006 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:47:49,006 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 04:47:49,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 535.2ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:49,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 04:47:49,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2021-06-05 04:47:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1139240506329116) internal successors, (167), 79 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 04:47:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 167 transitions. [2021-06-05 04:47:49,008 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 167 transitions. Word has length 14 [2021-06-05 04:47:49,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:49,008 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 167 transitions. [2021-06-05 04:47:49,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 04:47:49,008 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 167 transitions. [2021-06-05 04:47:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:47:49,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:49,009 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:49,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 04:47:49,209 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:49,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:49,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1311401613, now seen corresponding path program 3 times [2021-06-05 04:47:49,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:49,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981690199] [2021-06-05 04:47:49,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:49,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:49,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981690199] [2021-06-05 04:47:49,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981690199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:49,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869595886] [2021-06-05 04:47:49,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:49,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:47:49,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:49,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:47:49,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:49,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869595886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:49,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:49,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:47:49,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201247460] [2021-06-05 04:47:49,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:47:49,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:49,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:47:49,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:47:49,627 INFO L87 Difference]: Start difference. First operand 80 states and 167 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 04:47:49,810 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 04:47:49,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:49,967 INFO L93 Difference]: Finished difference Result 108 states and 218 transitions. [2021-06-05 04:47:49,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:47:49,968 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:47:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:49,968 INFO L225 Difference]: With dead ends: 108 [2021-06-05 04:47:49,968 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 04:47:49,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 481.0ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:47:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 04:47:49,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2021-06-05 04:47:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 78 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 04:47:49,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2021-06-05 04:47:49,971 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 14 [2021-06-05 04:47:49,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:49,971 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2021-06-05 04:47:49,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 04:47:49,971 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2021-06-05 04:47:49,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:47:49,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:49,971 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:50,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 04:47:50,181 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:50,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:50,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1308775837, now seen corresponding path program 4 times [2021-06-05 04:47:50,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:50,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110060923] [2021-06-05 04:47:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:50,344 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 04:47:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:50,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:50,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110060923] [2021-06-05 04:47:50,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110060923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:50,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171584219] [2021-06-05 04:47:50,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:50,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:50,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:50,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:47:50,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:50,601 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 04:47:50,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:50,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171584219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:50,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:50,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:47:50,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756477144] [2021-06-05 04:47:50,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:47:50,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:50,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:47:50,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:47:50,715 INFO L87 Difference]: Start difference. First operand 79 states and 164 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 04:47:51,114 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 04:47:51,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:51,275 INFO L93 Difference]: Finished difference Result 120 states and 237 transitions. [2021-06-05 04:47:51,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:47:51,275 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:47:51,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:51,276 INFO L225 Difference]: With dead ends: 120 [2021-06-05 04:47:51,276 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 04:47:51,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 806.3ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:47:51,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 04:47:51,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2021-06-05 04:47:51,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1139240506329116) internal successors, (167), 79 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 04:47:51,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 167 transitions. [2021-06-05 04:47:51,278 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 167 transitions. Word has length 14 [2021-06-05 04:47:51,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:51,278 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 167 transitions. [2021-06-05 04:47:51,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 04:47:51,278 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 167 transitions. [2021-06-05 04:47:51,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:47:51,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:51,279 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:51,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:51,493 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:51,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:51,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1047840443, now seen corresponding path program 5 times [2021-06-05 04:47:51,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:51,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985966907] [2021-06-05 04:47:51,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:51,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:51,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985966907] [2021-06-05 04:47:51,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985966907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:51,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496099893] [2021-06-05 04:47:51,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:51,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:51,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:51,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:47:51,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:54,683 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,697 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,705 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 04:47:54,716 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,723 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,730 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 04:47:54,738 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,744 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,750 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,750 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,757 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,757 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,764 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,764 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,769 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,770 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,775 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,776 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 04:47:54,784 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 04:47:54,793 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 04:47:54,802 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,808 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,809 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 04:47:54,816 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,823 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,823 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 04:47:54,831 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,836 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,837 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,842 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,842 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,849 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,855 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,855 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,862 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,868 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,873 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,873 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,880 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,880 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,886 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,886 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,892 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,892 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,897 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,898 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,903 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,903 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,908 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,909 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,914 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,920 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,925 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,926 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 04:47:54,935 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,940 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,946 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 04:47:54,954 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,960 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,971 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,977 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,977 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,985 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,986 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,990 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:54,991 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:54,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:54,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 04:47:54,998 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 04:47:55,005 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,010 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,011 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,015 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,016 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 04:47:55,022 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,026 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,027 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,032 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,036 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,037 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,042 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,042 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 04:47:55,049 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,054 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,059 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,063 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 04:47:55,069 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,073 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,073 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,078 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,083 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,089 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,093 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,093 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,098 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,101 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,105 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,110 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,111 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,120 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,121 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 04:47:55,128 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,131 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,132 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,137 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,138 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,142 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,146 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,149 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,150 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,153 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,158 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,161 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,161 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,167 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,171 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,175 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,175 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,179 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 04:47:55,183 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,186 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,186 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,191 INFO L550 ElimStorePlain]: Start of recursive call 86: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,194 INFO L550 ElimStorePlain]: Start of recursive call 87: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,197 INFO L550 ElimStorePlain]: Start of recursive call 88: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,200 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,201 INFO L550 ElimStorePlain]: Start of recursive call 89: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,203 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,204 INFO L550 ElimStorePlain]: Start of recursive call 90: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,300 INFO L628 ElimStorePlain]: treesize reduction 34, result has 77.5 percent of original size [2021-06-05 04:47:55,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 04:47:55,304 INFO L550 ElimStorePlain]: Start of recursive call 91: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,306 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,307 INFO L550 ElimStorePlain]: Start of recursive call 92: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:47:55,310 INFO L550 ElimStorePlain]: Start of recursive call 93: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:47:55,313 INFO L550 ElimStorePlain]: Start of recursive call 94: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:55,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:55,340 INFO L247 ElimStorePlain]: Needed 94 recursive calls to eliminate 3 variables, input treesize:4678, output treesize:38 [2021-06-05 04:47:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:55,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496099893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:55,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:55,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:47:55,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566878605] [2021-06-05 04:47:55,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:47:55,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:55,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:47:55,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:47:55,393 INFO L87 Difference]: Start difference. First operand 80 states and 167 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:55,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:55,569 INFO L93 Difference]: Finished difference Result 93 states and 184 transitions. [2021-06-05 04:47:55,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:47:55,569 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:47:55,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:55,570 INFO L225 Difference]: With dead ends: 93 [2021-06-05 04:47:55,570 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 04:47:55,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 411.2ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:47:55,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 04:47:55,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-06-05 04:47:55,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 04:47:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-06-05 04:47:55,571 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 14 [2021-06-05 04:47:55,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:55,572 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-06-05 04:47:55,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:47:55,572 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-06-05 04:47:55,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:47:55,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:55,572 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:55,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 04:47:55,773 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:55,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:55,773 INFO L82 PathProgramCache]: Analyzing trace with hash 685771365, now seen corresponding path program 1 times [2021-06-05 04:47:55,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:55,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572492819] [2021-06-05 04:47:55,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:47:55,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:55,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572492819] [2021-06-05 04:47:55,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572492819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:55,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803030842] [2021-06-05 04:47:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:55,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:47:55,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:56,214 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown