/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/parallel/bakery-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 20:49:42,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 20:49:42,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 20:49:42,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 20:49:42,077 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 [2021-05-21 20:49:42,103 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 20:49:42,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 20:49:42,105 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 20:49:42,105 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 20:49:42,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 20:49:42,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 20:49:42,107 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 20:49:42,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 20:49:42,107 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 20:49:42,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 20:49:42,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 20:49:42,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 20:49:42,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 20:49:42,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 20:49:42,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 20:49:42,108 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 20:49:42,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 20:49:42,108 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 20:49:42,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 20:49:42,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 20:49:42,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 20:49:42,109 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 20:49:42,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 20:49:42,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:49:42,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 20:49:42,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 20:49:42,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 20:49:42,109 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 20:49:42,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 20:49:42,109 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 20:49:42,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 20:49:42,110 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 20:49:42,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 20:49:42,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 20:49:42,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 20:49:42,368 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 20:49:42,369 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 20:49:42,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-3.wvr.bpl [2021-05-21 20:49:42,370 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-3.wvr.bpl' [2021-05-21 20:49:42,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 20:49:42,406 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 20:49:42,407 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 20:49:42,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 20:49:42,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 20:49:42,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:42" (1/1) ... [2021-05-21 20:49:42,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:42" (1/1) ... [2021-05-21 20:49:42,427 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 20:49:42,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 20:49:42,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 20:49:42,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 20:49:42,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:42" (1/1) ... [2021-05-21 20:49:42,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:42" (1/1) ... [2021-05-21 20:49:42,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:42" (1/1) ... [2021-05-21 20:49:42,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:42" (1/1) ... [2021-05-21 20:49:42,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:42" (1/1) ... [2021-05-21 20:49:42,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:42" (1/1) ... [2021-05-21 20:49:42,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:42" (1/1) ... [2021-05-21 20:49:42,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 20:49:42,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 20:49:42,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 20:49:42,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 20:49:42,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:42" (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 [2021-05-21 20:49:42,481 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 20:49:42,481 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 20:49:42,481 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 20:49:42,481 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 20:49:42,481 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 20:49:42,482 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 20:49:42,482 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 20:49:42,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 20:49:42,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 20:49:42,482 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 20:49:42,482 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 20:49:42,482 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 20:49:42,483 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 20:49:42,624 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 20:49:42,624 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 20:49:42,625 INFO L202 PluginConnector]: Adding new model bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:49:42 BoogieIcfgContainer [2021-05-21 20:49:42,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 20:49:42,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 20:49:42,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 20:49:42,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 20:49:42,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:42" (1/2) ... [2021-05-21 20:49:42,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290ec27e and model type bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 08:49:42, skipping insertion in model container [2021-05-21 20:49:42,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:49:42" (2/2) ... [2021-05-21 20:49:42,630 INFO L111 eAbstractionObserver]: Analyzing ICFG bakery-3.wvr.bpl [2021-05-21 20:49:42,634 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 20:49:42,634 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 20:49:42,635 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 20:49:42,635 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 20:49:42,702 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-21 20:49:42,726 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-21 20:49:42,738 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 20:49:42,738 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 20:49:42,738 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 20:49:42,738 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 20:49:42,738 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 20:49:42,738 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 20:49:42,739 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 20:49:42,739 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 20:49:42,745 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 63 places, 53 transitions, 130 flow [2021-05-21 20:49:42,877 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3171 states, 3169 states have (on average 2.7847901546229092) internal successors, (8825), 3170 states have internal predecessors, (8825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:42,884 INFO L276 IsEmpty]: Start isEmpty. Operand has 3171 states, 3169 states have (on average 2.7847901546229092) internal successors, (8825), 3170 states have internal predecessors, (8825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:42,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:42,905 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:42,906 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:42,906 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:42,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:42,910 INFO L82 PathProgramCache]: Analyzing trace with hash 21714732, now seen corresponding path program 1 times [2021-05-21 20:49:42,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:42,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139593056] [2021-05-21 20:49:42,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:43,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:43,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139593056] [2021-05-21 20:49:43,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139593056] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:43,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:43,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:43,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248435153] [2021-05-21 20:49:43,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:49:43,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:43,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:49:43,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:49:43,234 INFO L87 Difference]: Start difference. First operand has 3171 states, 3169 states have (on average 2.7847901546229092) internal successors, (8825), 3170 states have internal predecessors, (8825), 0 states have call successors, (0), 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 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:43,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:43,615 INFO L93 Difference]: Finished difference Result 5296 states and 14750 transitions. [2021-05-21 20:49:43,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:49:43,617 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:43,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:43,651 INFO L225 Difference]: With dead ends: 5296 [2021-05-21 20:49:43,651 INFO L226 Difference]: Without dead ends: 5296 [2021-05-21 20:49:43,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:43,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5296 states. [2021-05-21 20:49:43,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5296 to 4137. [2021-05-21 20:49:43,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4137 states, 4136 states have (on average 2.775386847195358) internal successors, (11479), 4136 states have internal predecessors, (11479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4137 states to 4137 states and 11479 transitions. [2021-05-21 20:49:43,838 INFO L78 Accepts]: Start accepts. Automaton has 4137 states and 11479 transitions. Word has length 48 [2021-05-21 20:49:43,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:43,838 INFO L482 AbstractCegarLoop]: Abstraction has 4137 states and 11479 transitions. [2021-05-21 20:49:43,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:43,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4137 states and 11479 transitions. [2021-05-21 20:49:43,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:43,845 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:43,846 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:43,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 20:49:43,846 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:43,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:43,847 INFO L82 PathProgramCache]: Analyzing trace with hash -929108830, now seen corresponding path program 2 times [2021-05-21 20:49:43,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:43,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862394801] [2021-05-21 20:49:43,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:43,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:43,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:43,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862394801] [2021-05-21 20:49:43,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862394801] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:43,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:43,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:43,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482359036] [2021-05-21 20:49:43,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:49:43,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:43,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:49:43,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:49:43,971 INFO L87 Difference]: Start difference. First operand 4137 states and 11479 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:44,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:44,127 INFO L93 Difference]: Finished difference Result 5296 states and 14222 transitions. [2021-05-21 20:49:44,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:49:44,128 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:44,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:44,147 INFO L225 Difference]: With dead ends: 5296 [2021-05-21 20:49:44,147 INFO L226 Difference]: Without dead ends: 5103 [2021-05-21 20:49:44,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 139.4ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:49:44,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5103 states. [2021-05-21 20:49:44,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5103 to 4184. [2021-05-21 20:49:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4184 states, 4183 states have (on average 2.764044943820225) internal successors, (11562), 4183 states have internal predecessors, (11562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:44,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4184 states to 4184 states and 11562 transitions. [2021-05-21 20:49:44,259 INFO L78 Accepts]: Start accepts. Automaton has 4184 states and 11562 transitions. Word has length 48 [2021-05-21 20:49:44,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:44,259 INFO L482 AbstractCegarLoop]: Abstraction has 4184 states and 11562 transitions. [2021-05-21 20:49:44,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:44,260 INFO L276 IsEmpty]: Start isEmpty. Operand 4184 states and 11562 transitions. [2021-05-21 20:49:44,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:44,268 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:44,268 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:44,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 20:49:44,268 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:44,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:44,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1921632898, now seen corresponding path program 3 times [2021-05-21 20:49:44,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:44,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893356161] [2021-05-21 20:49:44,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:44,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:44,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893356161] [2021-05-21 20:49:44,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893356161] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:44,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:44,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-21 20:49:44,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119150124] [2021-05-21 20:49:44,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:49:44,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:44,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:49:44,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:44,557 INFO L87 Difference]: Start difference. First operand 4184 states and 11562 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:44,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:44,941 INFO L93 Difference]: Finished difference Result 6610 states and 17999 transitions. [2021-05-21 20:49:44,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:49:44,941 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:44,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:44,973 INFO L225 Difference]: With dead ends: 6610 [2021-05-21 20:49:44,975 INFO L226 Difference]: Without dead ends: 6580 [2021-05-21 20:49:44,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 167.3ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:49:45,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6580 states. [2021-05-21 20:49:45,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6580 to 4689. [2021-05-21 20:49:45,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4689 states, 4688 states have (on average 2.7361348122866893) internal successors, (12827), 4688 states have internal predecessors, (12827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4689 states to 4689 states and 12827 transitions. [2021-05-21 20:49:45,114 INFO L78 Accepts]: Start accepts. Automaton has 4689 states and 12827 transitions. Word has length 48 [2021-05-21 20:49:45,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:45,114 INFO L482 AbstractCegarLoop]: Abstraction has 4689 states and 12827 transitions. [2021-05-21 20:49:45,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 4689 states and 12827 transitions. [2021-05-21 20:49:45,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:45,123 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:45,123 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:45,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 20:49:45,123 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:45,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:45,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1315335104, now seen corresponding path program 4 times [2021-05-21 20:49:45,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:45,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641972821] [2021-05-21 20:49:45,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:45,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:45,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641972821] [2021-05-21 20:49:45,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641972821] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:45,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:45,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-21 20:49:45,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302217628] [2021-05-21 20:49:45,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:49:45,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:45,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:49:45,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:45,313 INFO L87 Difference]: Start difference. First operand 4689 states and 12827 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:45,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:45,768 INFO L93 Difference]: Finished difference Result 6721 states and 18256 transitions. [2021-05-21 20:49:45,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:49:45,769 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:45,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:45,781 INFO L225 Difference]: With dead ends: 6721 [2021-05-21 20:49:45,781 INFO L226 Difference]: Without dead ends: 6721 [2021-05-21 20:49:45,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:49:45,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2021-05-21 20:49:45,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 4488. [2021-05-21 20:49:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4487 states have (on average 2.74793848896813) internal successors, (12330), 4487 states have internal predecessors, (12330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:45,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 12330 transitions. [2021-05-21 20:49:45,912 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 12330 transitions. Word has length 48 [2021-05-21 20:49:45,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:45,912 INFO L482 AbstractCegarLoop]: Abstraction has 4488 states and 12330 transitions. [2021-05-21 20:49:45,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:45,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 12330 transitions. [2021-05-21 20:49:45,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:45,919 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:45,919 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:45,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 20:49:45,919 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:45,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:45,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1820845956, now seen corresponding path program 5 times [2021-05-21 20:49:45,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:45,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816097800] [2021-05-21 20:49:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:45,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:45,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816097800] [2021-05-21 20:49:45,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816097800] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:45,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:45,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:45,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412856850] [2021-05-21 20:49:45,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:49:45,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:45,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:49:45,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:49:46,000 INFO L87 Difference]: Start difference. First operand 4488 states and 12330 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:46,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:46,123 INFO L93 Difference]: Finished difference Result 5641 states and 15049 transitions. [2021-05-21 20:49:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:49:46,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:46,131 INFO L225 Difference]: With dead ends: 5641 [2021-05-21 20:49:46,131 INFO L226 Difference]: Without dead ends: 5161 [2021-05-21 20:49:46,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:49:46,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2021-05-21 20:49:46,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 4243. [2021-05-21 20:49:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4243 states, 4242 states have (on average 2.747053276756247) internal successors, (11653), 4242 states have internal predecessors, (11653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:46,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4243 states to 4243 states and 11653 transitions. [2021-05-21 20:49:46,213 INFO L78 Accepts]: Start accepts. Automaton has 4243 states and 11653 transitions. Word has length 48 [2021-05-21 20:49:46,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:46,213 INFO L482 AbstractCegarLoop]: Abstraction has 4243 states and 11653 transitions. [2021-05-21 20:49:46,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:46,213 INFO L276 IsEmpty]: Start isEmpty. Operand 4243 states and 11653 transitions. [2021-05-21 20:49:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:46,219 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:46,220 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:46,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 20:49:46,220 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:46,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:46,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1271126176, now seen corresponding path program 6 times [2021-05-21 20:49:46,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:46,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017753970] [2021-05-21 20:49:46,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:46,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:46,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017753970] [2021-05-21 20:49:46,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017753970] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:46,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:46,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:49:46,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63575487] [2021-05-21 20:49:46,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 20:49:46,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:46,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 20:49:46,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:49:46,233 INFO L87 Difference]: Start difference. First operand 4243 states and 11653 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:46,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:46,247 INFO L93 Difference]: Finished difference Result 4195 states and 11359 transitions. [2021-05-21 20:49:46,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 20:49:46,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:46,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:46,253 INFO L225 Difference]: With dead ends: 4195 [2021-05-21 20:49:46,253 INFO L226 Difference]: Without dead ends: 4183 [2021-05-21 20:49:46,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:49:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4183 states. [2021-05-21 20:49:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4183 to 4183. [2021-05-21 20:49:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 2.7082735533237687) internal successors, (11326), 4182 states have internal predecessors, (11326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:46,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 11326 transitions. [2021-05-21 20:49:46,377 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 11326 transitions. Word has length 48 [2021-05-21 20:49:46,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:46,377 INFO L482 AbstractCegarLoop]: Abstraction has 4183 states and 11326 transitions. [2021-05-21 20:49:46,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:46,377 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 11326 transitions. [2021-05-21 20:49:46,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:46,385 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:46,385 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:46,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 20:49:46,385 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:46,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:46,386 INFO L82 PathProgramCache]: Analyzing trace with hash -3563124, now seen corresponding path program 7 times [2021-05-21 20:49:46,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:46,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588343129] [2021-05-21 20:49:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:46,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:46,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588343129] [2021-05-21 20:49:46,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588343129] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:46,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:46,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:46,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846248457] [2021-05-21 20:49:46,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:49:46,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:46,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:49:46,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:49:46,469 INFO L87 Difference]: Start difference. First operand 4183 states and 11326 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:46,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:46,642 INFO L93 Difference]: Finished difference Result 5052 states and 13458 transitions. [2021-05-21 20:49:46,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:49:46,642 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:46,649 INFO L225 Difference]: With dead ends: 5052 [2021-05-21 20:49:46,649 INFO L226 Difference]: Without dead ends: 4789 [2021-05-21 20:49:46,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:49:46,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4789 states. [2021-05-21 20:49:46,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4789 to 4195. [2021-05-21 20:49:46,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4195 states, 4194 states have (on average 2.7067238912732474) internal successors, (11352), 4194 states have internal predecessors, (11352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:46,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 11352 transitions. [2021-05-21 20:49:46,726 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 11352 transitions. Word has length 48 [2021-05-21 20:49:46,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:46,726 INFO L482 AbstractCegarLoop]: Abstraction has 4195 states and 11352 transitions. [2021-05-21 20:49:46,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:46,727 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 11352 transitions. [2021-05-21 20:49:46,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:46,733 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:46,733 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:46,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 20:49:46,733 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:46,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:46,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1405904278, now seen corresponding path program 8 times [2021-05-21 20:49:46,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:46,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813160495] [2021-05-21 20:49:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:46,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:46,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813160495] [2021-05-21 20:49:46,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813160495] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:46,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:46,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-21 20:49:46,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408128158] [2021-05-21 20:49:46,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:49:46,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:46,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:49:46,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:46,919 INFO L87 Difference]: Start difference. First operand 4195 states and 11352 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:47,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:47,297 INFO L93 Difference]: Finished difference Result 5958 states and 16031 transitions. [2021-05-21 20:49:47,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:49:47,297 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:47,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:47,305 INFO L225 Difference]: With dead ends: 5958 [2021-05-21 20:49:47,305 INFO L226 Difference]: Without dead ends: 5195 [2021-05-21 20:49:47,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 207.4ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:49:47,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5195 states. [2021-05-21 20:49:47,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5195 to 4186. [2021-05-21 20:49:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4186 states, 4185 states have (on average 2.705137395459976) internal successors, (11321), 4185 states have internal predecessors, (11321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:47,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4186 states to 4186 states and 11321 transitions. [2021-05-21 20:49:47,379 INFO L78 Accepts]: Start accepts. Automaton has 4186 states and 11321 transitions. Word has length 48 [2021-05-21 20:49:47,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:47,380 INFO L482 AbstractCegarLoop]: Abstraction has 4186 states and 11321 transitions. [2021-05-21 20:49:47,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:47,380 INFO L276 IsEmpty]: Start isEmpty. Operand 4186 states and 11321 transitions. [2021-05-21 20:49:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:47,386 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:47,386 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:47,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-21 20:49:47,386 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:47,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:47,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1813768894, now seen corresponding path program 9 times [2021-05-21 20:49:47,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:47,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325091165] [2021-05-21 20:49:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:47,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:47,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325091165] [2021-05-21 20:49:47,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325091165] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:47,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:47,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:47,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154666921] [2021-05-21 20:49:47,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:49:47,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:47,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:49:47,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:49:47,504 INFO L87 Difference]: Start difference. First operand 4186 states and 11321 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:47,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:47,798 INFO L93 Difference]: Finished difference Result 10394 states and 28527 transitions. [2021-05-21 20:49:47,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:49:47,799 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:47,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:47,813 INFO L225 Difference]: With dead ends: 10394 [2021-05-21 20:49:47,814 INFO L226 Difference]: Without dead ends: 10348 [2021-05-21 20:49:47,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:49:47,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10348 states. [2021-05-21 20:49:47,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10348 to 4829. [2021-05-21 20:49:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4828 states have (on average 2.714374482187241) internal successors, (13105), 4828 states have internal predecessors, (13105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 13105 transitions. [2021-05-21 20:49:47,949 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 13105 transitions. Word has length 48 [2021-05-21 20:49:47,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:47,949 INFO L482 AbstractCegarLoop]: Abstraction has 4829 states and 13105 transitions. [2021-05-21 20:49:47,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:47,950 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 13105 transitions. [2021-05-21 20:49:47,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:47,956 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:47,956 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:47,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-21 20:49:47,956 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:47,957 INFO L82 PathProgramCache]: Analyzing trace with hash -962288318, now seen corresponding path program 10 times [2021-05-21 20:49:47,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:47,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576908089] [2021-05-21 20:49:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:48,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:48,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576908089] [2021-05-21 20:49:48,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576908089] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:48,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:48,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:48,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735400102] [2021-05-21 20:49:48,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:49:48,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:48,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:49:48,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:49:48,115 INFO L87 Difference]: Start difference. First operand 4829 states and 13105 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:48,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:48,466 INFO L93 Difference]: Finished difference Result 10579 states and 28918 transitions. [2021-05-21 20:49:48,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:49:48,467 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:48,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:48,480 INFO L225 Difference]: With dead ends: 10579 [2021-05-21 20:49:48,480 INFO L226 Difference]: Without dead ends: 10116 [2021-05-21 20:49:48,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:49:48,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10116 states. [2021-05-21 20:49:48,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10116 to 4940. [2021-05-21 20:49:48,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4940 states, 4939 states have (on average 2.7064183033002633) internal successors, (13367), 4939 states have internal predecessors, (13367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:48,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4940 states to 4940 states and 13367 transitions. [2021-05-21 20:49:48,623 INFO L78 Accepts]: Start accepts. Automaton has 4940 states and 13367 transitions. Word has length 48 [2021-05-21 20:49:48,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:48,623 INFO L482 AbstractCegarLoop]: Abstraction has 4940 states and 13367 transitions. [2021-05-21 20:49:48,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:48,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4940 states and 13367 transitions. [2021-05-21 20:49:48,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:48,630 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:48,630 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:48,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-21 20:49:48,631 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:48,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:48,631 INFO L82 PathProgramCache]: Analyzing trace with hash 556588354, now seen corresponding path program 11 times [2021-05-21 20:49:48,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:48,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802442289] [2021-05-21 20:49:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:48,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:48,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802442289] [2021-05-21 20:49:48,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802442289] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:48,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:48,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-21 20:49:48,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270023020] [2021-05-21 20:49:48,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:49:48,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:48,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:49:48,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:48,793 INFO L87 Difference]: Start difference. First operand 4940 states and 13367 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:49,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:49,251 INFO L93 Difference]: Finished difference Result 10992 states and 28956 transitions. [2021-05-21 20:49:49,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:49:49,251 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:49,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:49,262 INFO L225 Difference]: With dead ends: 10992 [2021-05-21 20:49:49,262 INFO L226 Difference]: Without dead ends: 10476 [2021-05-21 20:49:49,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:49:49,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10476 states. [2021-05-21 20:49:49,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10476 to 5600. [2021-05-21 20:49:49,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5600 states, 5599 states have (on average 2.7051259153420255) internal successors, (15146), 5599 states have internal predecessors, (15146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:49,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5600 states to 5600 states and 15146 transitions. [2021-05-21 20:49:49,366 INFO L78 Accepts]: Start accepts. Automaton has 5600 states and 15146 transitions. Word has length 48 [2021-05-21 20:49:49,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:49,366 INFO L482 AbstractCegarLoop]: Abstraction has 5600 states and 15146 transitions. [2021-05-21 20:49:49,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:49,367 INFO L276 IsEmpty]: Start isEmpty. Operand 5600 states and 15146 transitions. [2021-05-21 20:49:49,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:49,373 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:49,373 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:49,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-21 20:49:49,373 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:49,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:49,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1232770074, now seen corresponding path program 12 times [2021-05-21 20:49:49,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:49,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673179004] [2021-05-21 20:49:49,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:49,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:49,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673179004] [2021-05-21 20:49:49,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673179004] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:49,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:49,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-21 20:49:49,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901521267] [2021-05-21 20:49:49,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:49:49,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:49,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:49:49,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:49,484 INFO L87 Difference]: Start difference. First operand 5600 states and 15146 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:49,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:49,716 INFO L93 Difference]: Finished difference Result 9309 states and 24818 transitions. [2021-05-21 20:49:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:49:49,716 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:49,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:49,725 INFO L225 Difference]: With dead ends: 9309 [2021-05-21 20:49:49,725 INFO L226 Difference]: Without dead ends: 8873 [2021-05-21 20:49:49,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:49:49,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8873 states. [2021-05-21 20:49:49,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8873 to 6236. [2021-05-21 20:49:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6236 states, 6235 states have (on average 2.6882117080994385) internal successors, (16761), 6235 states have internal predecessors, (16761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:49,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6236 states to 6236 states and 16761 transitions. [2021-05-21 20:49:49,844 INFO L78 Accepts]: Start accepts. Automaton has 6236 states and 16761 transitions. Word has length 48 [2021-05-21 20:49:49,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:49,844 INFO L482 AbstractCegarLoop]: Abstraction has 6236 states and 16761 transitions. [2021-05-21 20:49:49,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:49,844 INFO L276 IsEmpty]: Start isEmpty. Operand 6236 states and 16761 transitions. [2021-05-21 20:49:49,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:49,852 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:49,852 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:49,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-21 20:49:49,852 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:49,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:49,853 INFO L82 PathProgramCache]: Analyzing trace with hash -80771658, now seen corresponding path program 13 times [2021-05-21 20:49:49,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:49,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336545758] [2021-05-21 20:49:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:49,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:49,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336545758] [2021-05-21 20:49:49,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336545758] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:49,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:49,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-21 20:49:49,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542550658] [2021-05-21 20:49:49,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:49:49,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:49,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:49:49,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:49,943 INFO L87 Difference]: Start difference. First operand 6236 states and 16761 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:50,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:50,172 INFO L93 Difference]: Finished difference Result 7152 states and 19114 transitions. [2021-05-21 20:49:50,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:49:50,181 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:50,188 INFO L225 Difference]: With dead ends: 7152 [2021-05-21 20:49:50,188 INFO L226 Difference]: Without dead ends: 7152 [2021-05-21 20:49:50,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:50,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7152 states. [2021-05-21 20:49:50,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7152 to 6356. [2021-05-21 20:49:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6356 states, 6355 states have (on average 2.68324154209284) internal successors, (17052), 6355 states have internal predecessors, (17052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:50,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6356 states to 6356 states and 17052 transitions. [2021-05-21 20:49:50,293 INFO L78 Accepts]: Start accepts. Automaton has 6356 states and 17052 transitions. Word has length 48 [2021-05-21 20:49:50,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:50,293 INFO L482 AbstractCegarLoop]: Abstraction has 6356 states and 17052 transitions. [2021-05-21 20:49:50,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:50,293 INFO L276 IsEmpty]: Start isEmpty. Operand 6356 states and 17052 transitions. [2021-05-21 20:49:50,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:50,301 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:50,301 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:50,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-21 20:49:50,301 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:50,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:50,301 INFO L82 PathProgramCache]: Analyzing trace with hash 355340122, now seen corresponding path program 14 times [2021-05-21 20:49:50,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:50,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043536657] [2021-05-21 20:49:50,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:50,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:50,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043536657] [2021-05-21 20:49:50,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043536657] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:50,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:50,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-21 20:49:50,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271435579] [2021-05-21 20:49:50,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:49:50,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:50,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:49:50,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:50,390 INFO L87 Difference]: Start difference. First operand 6356 states and 17052 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:50,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:50,636 INFO L93 Difference]: Finished difference Result 7659 states and 20286 transitions. [2021-05-21 20:49:50,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:49:50,637 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:50,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:50,643 INFO L225 Difference]: With dead ends: 7659 [2021-05-21 20:49:50,643 INFO L226 Difference]: Without dead ends: 7395 [2021-05-21 20:49:50,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:49:50,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7395 states. [2021-05-21 20:49:50,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7395 to 6236. [2021-05-21 20:49:50,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6236 states, 6235 states have (on average 2.6843624699278266) internal successors, (16737), 6235 states have internal predecessors, (16737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:50,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6236 states to 6236 states and 16737 transitions. [2021-05-21 20:49:50,739 INFO L78 Accepts]: Start accepts. Automaton has 6236 states and 16737 transitions. Word has length 48 [2021-05-21 20:49:50,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:50,739 INFO L482 AbstractCegarLoop]: Abstraction has 6236 states and 16737 transitions. [2021-05-21 20:49:50,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:50,740 INFO L276 IsEmpty]: Start isEmpty. Operand 6236 states and 16737 transitions. [2021-05-21 20:49:50,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:50,746 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:50,746 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:50,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-21 20:49:50,746 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:50,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:50,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1889183876, now seen corresponding path program 15 times [2021-05-21 20:49:50,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:50,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577337655] [2021-05-21 20:49:50,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:50,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:50,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577337655] [2021-05-21 20:49:50,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577337655] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:50,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:50,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-21 20:49:50,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49030924] [2021-05-21 20:49:50,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:49:50,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:50,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:49:50,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:50,883 INFO L87 Difference]: Start difference. First operand 6236 states and 16737 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:51,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:51,201 INFO L93 Difference]: Finished difference Result 10117 states and 26888 transitions. [2021-05-21 20:49:51,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:49:51,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:51,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:51,211 INFO L225 Difference]: With dead ends: 10117 [2021-05-21 20:49:51,211 INFO L226 Difference]: Without dead ends: 10081 [2021-05-21 20:49:51,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:49:51,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10081 states. [2021-05-21 20:49:51,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10081 to 6383. [2021-05-21 20:49:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6383 states, 6382 states have (on average 2.680664368536509) internal successors, (17108), 6382 states have internal predecessors, (17108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:51,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6383 states to 6383 states and 17108 transitions. [2021-05-21 20:49:51,318 INFO L78 Accepts]: Start accepts. Automaton has 6383 states and 17108 transitions. Word has length 48 [2021-05-21 20:49:51,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:51,318 INFO L482 AbstractCegarLoop]: Abstraction has 6383 states and 17108 transitions. [2021-05-21 20:49:51,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:51,318 INFO L276 IsEmpty]: Start isEmpty. Operand 6383 states and 17108 transitions. [2021-05-21 20:49:51,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:51,324 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:51,324 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:51,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-21 20:49:51,325 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:51,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:51,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1104515038, now seen corresponding path program 16 times [2021-05-21 20:49:51,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:51,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417491428] [2021-05-21 20:49:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:51,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:51,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417491428] [2021-05-21 20:49:51,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417491428] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:51,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:51,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:51,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840489175] [2021-05-21 20:49:51,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:49:51,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:51,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:49:51,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:49:51,370 INFO L87 Difference]: Start difference. First operand 6383 states and 17108 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:51,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:51,488 INFO L93 Difference]: Finished difference Result 8915 states and 23684 transitions. [2021-05-21 20:49:51,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:49:51,488 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:51,494 INFO L225 Difference]: With dead ends: 8915 [2021-05-21 20:49:51,494 INFO L226 Difference]: Without dead ends: 7926 [2021-05-21 20:49:51,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7926 states. [2021-05-21 20:49:51,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7926 to 5742. [2021-05-21 20:49:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5742 states, 5741 states have (on average 2.653718864309354) internal successors, (15235), 5741 states have internal predecessors, (15235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:51,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5742 states to 5742 states and 15235 transitions. [2021-05-21 20:49:51,571 INFO L78 Accepts]: Start accepts. Automaton has 5742 states and 15235 transitions. Word has length 48 [2021-05-21 20:49:51,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:51,571 INFO L482 AbstractCegarLoop]: Abstraction has 5742 states and 15235 transitions. [2021-05-21 20:49:51,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:51,571 INFO L276 IsEmpty]: Start isEmpty. Operand 5742 states and 15235 transitions. [2021-05-21 20:49:51,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:51,575 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:51,575 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:51,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-21 20:49:51,576 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:51,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:51,576 INFO L82 PathProgramCache]: Analyzing trace with hash 271395798, now seen corresponding path program 17 times [2021-05-21 20:49:51,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:51,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530741547] [2021-05-21 20:49:51,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:51,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:51,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530741547] [2021-05-21 20:49:51,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530741547] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:51,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:51,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-21 20:49:51,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493872660] [2021-05-21 20:49:51,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:49:51,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:51,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:49:51,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:51,645 INFO L87 Difference]: Start difference. First operand 5742 states and 15235 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:51,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:51,886 INFO L93 Difference]: Finished difference Result 6475 states and 17030 transitions. [2021-05-21 20:49:51,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:49:51,886 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:51,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:51,892 INFO L225 Difference]: With dead ends: 6475 [2021-05-21 20:49:51,892 INFO L226 Difference]: Without dead ends: 6237 [2021-05-21 20:49:51,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:51,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6237 states. [2021-05-21 20:49:51,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6237 to 5579. [2021-05-21 20:49:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5579 states, 5578 states have (on average 2.6509501613481534) internal successors, (14787), 5578 states have internal predecessors, (14787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:51,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5579 states to 5579 states and 14787 transitions. [2021-05-21 20:49:51,971 INFO L78 Accepts]: Start accepts. Automaton has 5579 states and 14787 transitions. Word has length 48 [2021-05-21 20:49:51,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:51,971 INFO L482 AbstractCegarLoop]: Abstraction has 5579 states and 14787 transitions. [2021-05-21 20:49:51,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:51,971 INFO L276 IsEmpty]: Start isEmpty. Operand 5579 states and 14787 transitions. [2021-05-21 20:49:51,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:51,976 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:51,977 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:51,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-21 20:49:51,977 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:51,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:51,977 INFO L82 PathProgramCache]: Analyzing trace with hash 707507578, now seen corresponding path program 18 times [2021-05-21 20:49:51,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:51,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400967278] [2021-05-21 20:49:51,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:52,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:52,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400967278] [2021-05-21 20:49:52,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400967278] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:52,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:52,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-21 20:49:52,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747146803] [2021-05-21 20:49:52,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:49:52,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:52,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:49:52,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:52,083 INFO L87 Difference]: Start difference. First operand 5579 states and 14787 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:52,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:52,319 INFO L93 Difference]: Finished difference Result 6360 states and 16745 transitions. [2021-05-21 20:49:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:49:52,319 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:52,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:52,324 INFO L225 Difference]: With dead ends: 6360 [2021-05-21 20:49:52,324 INFO L226 Difference]: Without dead ends: 5998 [2021-05-21 20:49:52,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:49:52,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5998 states. [2021-05-21 20:49:52,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5998 to 5340. [2021-05-21 20:49:52,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5340 states, 5339 states have (on average 2.6606106012361868) internal successors, (14205), 5339 states have internal predecessors, (14205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:52,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5340 states to 5340 states and 14205 transitions. [2021-05-21 20:49:52,401 INFO L78 Accepts]: Start accepts. Automaton has 5340 states and 14205 transitions. Word has length 48 [2021-05-21 20:49:52,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:52,401 INFO L482 AbstractCegarLoop]: Abstraction has 5340 states and 14205 transitions. [2021-05-21 20:49:52,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:52,401 INFO L276 IsEmpty]: Start isEmpty. Operand 5340 states and 14205 transitions. [2021-05-21 20:49:52,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:52,405 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:52,405 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:52,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-21 20:49:52,405 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:52,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:52,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1707987518, now seen corresponding path program 19 times [2021-05-21 20:49:52,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:52,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228862790] [2021-05-21 20:49:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:52,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:52,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228862790] [2021-05-21 20:49:52,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228862790] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:52,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:52,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-21 20:49:52,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28975663] [2021-05-21 20:49:52,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:49:52,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:52,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:49:52,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:52,505 INFO L87 Difference]: Start difference. First operand 5340 states and 14205 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:52,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:52,710 INFO L93 Difference]: Finished difference Result 6454 states and 16972 transitions. [2021-05-21 20:49:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:49:52,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:52,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:52,716 INFO L225 Difference]: With dead ends: 6454 [2021-05-21 20:49:52,716 INFO L226 Difference]: Without dead ends: 6424 [2021-05-21 20:49:52,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:49:52,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6424 states. [2021-05-21 20:49:52,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6424 to 5412. [2021-05-21 20:49:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5412 states, 5411 states have (on average 2.6579190537793385) internal successors, (14382), 5411 states have internal predecessors, (14382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:52,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5412 states to 5412 states and 14382 transitions. [2021-05-21 20:49:52,787 INFO L78 Accepts]: Start accepts. Automaton has 5412 states and 14382 transitions. Word has length 48 [2021-05-21 20:49:52,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:52,787 INFO L482 AbstractCegarLoop]: Abstraction has 5412 states and 14382 transitions. [2021-05-21 20:49:52,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:52,788 INFO L276 IsEmpty]: Start isEmpty. Operand 5412 states and 14382 transitions. [2021-05-21 20:49:52,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:52,792 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:52,792 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:52,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-21 20:49:52,792 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:52,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:52,792 INFO L82 PathProgramCache]: Analyzing trace with hash -406719136, now seen corresponding path program 20 times [2021-05-21 20:49:52,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:52,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636039689] [2021-05-21 20:49:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:52,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:52,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636039689] [2021-05-21 20:49:52,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636039689] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:52,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:52,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:52,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027015086] [2021-05-21 20:49:52,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:49:52,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:52,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:49:52,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:49:52,854 INFO L87 Difference]: Start difference. First operand 5412 states and 14382 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:53,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:53,024 INFO L93 Difference]: Finished difference Result 7894 states and 20847 transitions. [2021-05-21 20:49:53,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:49:53,024 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:53,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:53,031 INFO L225 Difference]: With dead ends: 7894 [2021-05-21 20:49:53,031 INFO L226 Difference]: Without dead ends: 7798 [2021-05-21 20:49:53,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:53,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7798 states. [2021-05-21 20:49:53,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7798 to 5277. [2021-05-21 20:49:53,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5277 states, 5276 states have (on average 2.6639499620924942) internal successors, (14055), 5276 states have internal predecessors, (14055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5277 states to 5277 states and 14055 transitions. [2021-05-21 20:49:53,105 INFO L78 Accepts]: Start accepts. Automaton has 5277 states and 14055 transitions. Word has length 48 [2021-05-21 20:49:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:53,106 INFO L482 AbstractCegarLoop]: Abstraction has 5277 states and 14055 transitions. [2021-05-21 20:49:53,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:53,106 INFO L276 IsEmpty]: Start isEmpty. Operand 5277 states and 14055 transitions. [2021-05-21 20:49:53,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:53,110 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:53,110 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:53,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-21 20:49:53,110 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:53,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:53,110 INFO L82 PathProgramCache]: Analyzing trace with hash 994715074, now seen corresponding path program 21 times [2021-05-21 20:49:53,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:53,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925711236] [2021-05-21 20:49:53,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:53,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:53,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925711236] [2021-05-21 20:49:53,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925711236] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:53,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:53,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:49:53,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053748093] [2021-05-21 20:49:53,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 20:49:53,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:53,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 20:49:53,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:49:53,118 INFO L87 Difference]: Start difference. First operand 5277 states and 14055 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:53,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:53,128 INFO L93 Difference]: Finished difference Result 4552 states and 11743 transitions. [2021-05-21 20:49:53,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 20:49:53,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:53,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:53,131 INFO L225 Difference]: With dead ends: 4552 [2021-05-21 20:49:53,131 INFO L226 Difference]: Without dead ends: 4418 [2021-05-21 20:49:53,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:49:53,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4418 states. [2021-05-21 20:49:53,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4418 to 4370. [2021-05-21 20:49:53,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4370 states, 4369 states have (on average 2.5934996566720074) internal successors, (11331), 4369 states have internal predecessors, (11331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:53,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4370 states to 4370 states and 11331 transitions. [2021-05-21 20:49:53,184 INFO L78 Accepts]: Start accepts. Automaton has 4370 states and 11331 transitions. Word has length 48 [2021-05-21 20:49:53,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:53,184 INFO L482 AbstractCegarLoop]: Abstraction has 4370 states and 11331 transitions. [2021-05-21 20:49:53,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 4370 states and 11331 transitions. [2021-05-21 20:49:53,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:53,188 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:53,188 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:53,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-21 20:49:53,188 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:53,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:53,188 INFO L82 PathProgramCache]: Analyzing trace with hash 76293474, now seen corresponding path program 22 times [2021-05-21 20:49:53,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:53,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523638271] [2021-05-21 20:49:53,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:53,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:53,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523638271] [2021-05-21 20:49:53,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523638271] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:53,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:53,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:49:53,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902417180] [2021-05-21 20:49:53,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 20:49:53,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:53,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 20:49:53,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:49:53,199 INFO L87 Difference]: Start difference. First operand 4370 states and 11331 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:53,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:53,209 INFO L93 Difference]: Finished difference Result 4250 states and 10780 transitions. [2021-05-21 20:49:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 20:49:53,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:53,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:53,213 INFO L225 Difference]: With dead ends: 4250 [2021-05-21 20:49:53,214 INFO L226 Difference]: Without dead ends: 4250 [2021-05-21 20:49:53,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:49:53,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4250 states. [2021-05-21 20:49:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4250 to 4250. [2021-05-21 20:49:53,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 4249 states have (on average 2.5370675453047777) internal successors, (10780), 4249 states have internal predecessors, (10780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 10780 transitions. [2021-05-21 20:49:53,268 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 10780 transitions. Word has length 48 [2021-05-21 20:49:53,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:53,268 INFO L482 AbstractCegarLoop]: Abstraction has 4250 states and 10780 transitions. [2021-05-21 20:49:53,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:53,268 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 10780 transitions. [2021-05-21 20:49:53,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:53,272 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:53,272 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:53,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-21 20:49:53,272 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:53,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:53,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1673336162, now seen corresponding path program 23 times [2021-05-21 20:49:53,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:53,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613457377] [2021-05-21 20:49:53,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:53,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:53,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613457377] [2021-05-21 20:49:53,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613457377] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:53,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:53,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:53,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082776574] [2021-05-21 20:49:53,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:49:53,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:53,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:49:53,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:49:53,327 INFO L87 Difference]: Start difference. First operand 4250 states and 10780 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:53,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:53,425 INFO L93 Difference]: Finished difference Result 4826 states and 12069 transitions. [2021-05-21 20:49:53,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:49:53,425 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:53,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:53,429 INFO L225 Difference]: With dead ends: 4826 [2021-05-21 20:49:53,429 INFO L226 Difference]: Without dead ends: 4486 [2021-05-21 20:49:53,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:49:53,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-05-21 20:49:53,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 4162. [2021-05-21 20:49:53,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4162 states, 4161 states have (on average 2.5231915404950733) internal successors, (10499), 4161 states have internal predecessors, (10499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:53,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4162 states to 4162 states and 10499 transitions. [2021-05-21 20:49:53,512 INFO L78 Accepts]: Start accepts. Automaton has 4162 states and 10499 transitions. Word has length 48 [2021-05-21 20:49:53,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:53,512 INFO L482 AbstractCegarLoop]: Abstraction has 4162 states and 10499 transitions. [2021-05-21 20:49:53,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:53,512 INFO L276 IsEmpty]: Start isEmpty. Operand 4162 states and 10499 transitions. [2021-05-21 20:49:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:53,516 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:53,516 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:53,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-21 20:49:53,516 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:53,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:53,516 INFO L82 PathProgramCache]: Analyzing trace with hash -869937714, now seen corresponding path program 24 times [2021-05-21 20:49:53,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:53,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668837057] [2021-05-21 20:49:53,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:53,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:53,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668837057] [2021-05-21 20:49:53,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668837057] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:53,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:53,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-21 20:49:53,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407054190] [2021-05-21 20:49:53,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:49:53,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:53,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:49:53,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:53,583 INFO L87 Difference]: Start difference. First operand 4162 states and 10499 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:53,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:53,817 INFO L93 Difference]: Finished difference Result 6178 states and 15407 transitions. [2021-05-21 20:49:53,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:49:53,818 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:53,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:53,823 INFO L225 Difference]: With dead ends: 6178 [2021-05-21 20:49:53,823 INFO L226 Difference]: Without dead ends: 6020 [2021-05-21 20:49:53,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:49:53,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6020 states. [2021-05-21 20:49:53,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6020 to 4186. [2021-05-21 20:49:53,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4186 states, 4185 states have (on average 2.521624850657109) internal successors, (10553), 4185 states have internal predecessors, (10553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4186 states to 4186 states and 10553 transitions. [2021-05-21 20:49:53,901 INFO L78 Accepts]: Start accepts. Automaton has 4186 states and 10553 transitions. Word has length 48 [2021-05-21 20:49:53,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:53,901 INFO L482 AbstractCegarLoop]: Abstraction has 4186 states and 10553 transitions. [2021-05-21 20:49:53,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:53,901 INFO L276 IsEmpty]: Start isEmpty. Operand 4186 states and 10553 transitions. [2021-05-21 20:49:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:53,905 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:53,905 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:53,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-21 20:49:53,905 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:53,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:53,906 INFO L82 PathProgramCache]: Analyzing trace with hash -221230618, now seen corresponding path program 25 times [2021-05-21 20:49:53,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:53,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239345134] [2021-05-21 20:49:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:53,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:53,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239345134] [2021-05-21 20:49:53,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239345134] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:53,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:53,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:49:53,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159699275] [2021-05-21 20:49:53,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:53,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:53,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:53,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:53,978 INFO L87 Difference]: Start difference. First operand 4186 states and 10553 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:54,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:54,105 INFO L93 Difference]: Finished difference Result 6074 states and 15232 transitions. [2021-05-21 20:49:54,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:54,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:54,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:54,111 INFO L225 Difference]: With dead ends: 6074 [2021-05-21 20:49:54,111 INFO L226 Difference]: Without dead ends: 6010 [2021-05-21 20:49:54,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:54,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6010 states. [2021-05-21 20:49:54,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6010 to 4817. [2021-05-21 20:49:54,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4817 states, 4816 states have (on average 2.514950166112957) internal successors, (12112), 4816 states have internal predecessors, (12112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4817 states to 4817 states and 12112 transitions. [2021-05-21 20:49:54,185 INFO L78 Accepts]: Start accepts. Automaton has 4817 states and 12112 transitions. Word has length 48 [2021-05-21 20:49:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:54,186 INFO L482 AbstractCegarLoop]: Abstraction has 4817 states and 12112 transitions. [2021-05-21 20:49:54,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4817 states and 12112 transitions. [2021-05-21 20:49:54,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:54,191 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:54,191 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:54,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-21 20:49:54,191 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:54,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:54,191 INFO L82 PathProgramCache]: Analyzing trace with hash 773664548, now seen corresponding path program 26 times [2021-05-21 20:49:54,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:54,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626351220] [2021-05-21 20:49:54,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:54,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:54,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626351220] [2021-05-21 20:49:54,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626351220] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:54,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:54,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:49:54,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094375203] [2021-05-21 20:49:54,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:54,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:54,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:54,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:54,257 INFO L87 Difference]: Start difference. First operand 4817 states and 12112 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:54,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:54,388 INFO L93 Difference]: Finished difference Result 5483 states and 13653 transitions. [2021-05-21 20:49:54,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:54,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:54,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:54,393 INFO L225 Difference]: With dead ends: 5483 [2021-05-21 20:49:54,393 INFO L226 Difference]: Without dead ends: 5285 [2021-05-21 20:49:54,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:54,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5285 states. [2021-05-21 20:49:54,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5285 to 4721. [2021-05-21 20:49:54,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4721 states, 4720 states have (on average 2.510593220338983) internal successors, (11850), 4720 states have internal predecessors, (11850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4721 states to 4721 states and 11850 transitions. [2021-05-21 20:49:54,458 INFO L78 Accepts]: Start accepts. Automaton has 4721 states and 11850 transitions. Word has length 48 [2021-05-21 20:49:54,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:54,458 INFO L482 AbstractCegarLoop]: Abstraction has 4721 states and 11850 transitions. [2021-05-21 20:49:54,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:54,458 INFO L276 IsEmpty]: Start isEmpty. Operand 4721 states and 11850 transitions. [2021-05-21 20:49:54,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:54,462 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:54,462 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:54,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-21 20:49:54,463 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:54,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:54,463 INFO L82 PathProgramCache]: Analyzing trace with hash -458909894, now seen corresponding path program 27 times [2021-05-21 20:49:54,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:54,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827002973] [2021-05-21 20:49:54,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:54,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:54,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827002973] [2021-05-21 20:49:54,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827002973] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:54,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:54,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:54,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635483639] [2021-05-21 20:49:54,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:49:54,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:54,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:49:54,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:49:54,529 INFO L87 Difference]: Start difference. First operand 4721 states and 11850 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:54,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:54,635 INFO L93 Difference]: Finished difference Result 5071 states and 12592 transitions. [2021-05-21 20:49:54,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:49:54,636 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:54,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:54,640 INFO L225 Difference]: With dead ends: 5071 [2021-05-21 20:49:54,640 INFO L226 Difference]: Without dead ends: 4977 [2021-05-21 20:49:54,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:49:54,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2021-05-21 20:49:54,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4701. [2021-05-21 20:49:54,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4701 states, 4700 states have (on average 2.5063829787234044) internal successors, (11780), 4700 states have internal predecessors, (11780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:54,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4701 states to 4701 states and 11780 transitions. [2021-05-21 20:49:54,691 INFO L78 Accepts]: Start accepts. Automaton has 4701 states and 11780 transitions. Word has length 48 [2021-05-21 20:49:54,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:54,691 INFO L482 AbstractCegarLoop]: Abstraction has 4701 states and 11780 transitions. [2021-05-21 20:49:54,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:54,691 INFO L276 IsEmpty]: Start isEmpty. Operand 4701 states and 11780 transitions. [2021-05-21 20:49:54,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:54,695 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:54,695 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:54,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-21 20:49:54,695 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:54,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:54,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1054099754, now seen corresponding path program 28 times [2021-05-21 20:49:54,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:54,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074480564] [2021-05-21 20:49:54,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:54,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:54,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074480564] [2021-05-21 20:49:54,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074480564] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:54,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:54,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:49:54,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026075209] [2021-05-21 20:49:54,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:54,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:54,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:54,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:54,747 INFO L87 Difference]: Start difference. First operand 4701 states and 11780 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:54,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:54,869 INFO L93 Difference]: Finished difference Result 5012 states and 12428 transitions. [2021-05-21 20:49:54,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:49:54,869 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:54,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:54,873 INFO L225 Difference]: With dead ends: 5012 [2021-05-21 20:49:54,873 INFO L226 Difference]: Without dead ends: 4956 [2021-05-21 20:49:54,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:54,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4956 states. [2021-05-21 20:49:54,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4956 to 4626. [2021-05-21 20:49:54,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4626 states, 4625 states have (on average 2.4966486486486485) internal successors, (11547), 4625 states have internal predecessors, (11547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:54,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 11547 transitions. [2021-05-21 20:49:54,930 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 11547 transitions. Word has length 48 [2021-05-21 20:49:54,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:54,930 INFO L482 AbstractCegarLoop]: Abstraction has 4626 states and 11547 transitions. [2021-05-21 20:49:54,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:54,930 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 11547 transitions. [2021-05-21 20:49:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:54,934 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:54,934 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:54,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-21 20:49:54,934 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:54,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:54,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1231787908, now seen corresponding path program 29 times [2021-05-21 20:49:54,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:54,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550071838] [2021-05-21 20:49:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:54,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:54,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550071838] [2021-05-21 20:49:54,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550071838] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:54,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:54,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:49:54,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528250629] [2021-05-21 20:49:54,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:54,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:54,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:54,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:54,992 INFO L87 Difference]: Start difference. First operand 4626 states and 11547 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:55,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:55,129 INFO L93 Difference]: Finished difference Result 5161 states and 12755 transitions. [2021-05-21 20:49:55,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:55,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:55,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:55,134 INFO L225 Difference]: With dead ends: 5161 [2021-05-21 20:49:55,134 INFO L226 Difference]: Without dead ends: 5097 [2021-05-21 20:49:55,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:55,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5097 states. [2021-05-21 20:49:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5097 to 4562. [2021-05-21 20:49:55,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4562 states, 4561 states have (on average 2.4930936198202147) internal successors, (11371), 4561 states have internal predecessors, (11371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4562 states to 4562 states and 11371 transitions. [2021-05-21 20:49:55,211 INFO L78 Accepts]: Start accepts. Automaton has 4562 states and 11371 transitions. Word has length 48 [2021-05-21 20:49:55,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:55,211 INFO L482 AbstractCegarLoop]: Abstraction has 4562 states and 11371 transitions. [2021-05-21 20:49:55,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:55,211 INFO L276 IsEmpty]: Start isEmpty. Operand 4562 states and 11371 transitions. [2021-05-21 20:49:55,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:55,216 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:55,216 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:55,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-21 20:49:55,216 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:55,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:55,216 INFO L82 PathProgramCache]: Analyzing trace with hash -2068284222, now seen corresponding path program 30 times [2021-05-21 20:49:55,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:55,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225852253] [2021-05-21 20:49:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:55,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:55,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225852253] [2021-05-21 20:49:55,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225852253] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:55,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:55,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:49:55,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122732743] [2021-05-21 20:49:55,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:55,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:55,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:55,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:55,270 INFO L87 Difference]: Start difference. First operand 4562 states and 11371 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:55,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:55,384 INFO L93 Difference]: Finished difference Result 4731 states and 11602 transitions. [2021-05-21 20:49:55,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:55,384 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:55,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:55,388 INFO L225 Difference]: With dead ends: 4731 [2021-05-21 20:49:55,388 INFO L226 Difference]: Without dead ends: 4554 [2021-05-21 20:49:55,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:55,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2021-05-21 20:49:55,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 3648. [2021-05-21 20:49:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3648 states, 3647 states have (on average 2.4798464491362764) internal successors, (9044), 3647 states have internal predecessors, (9044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:55,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 9044 transitions. [2021-05-21 20:49:55,438 INFO L78 Accepts]: Start accepts. Automaton has 3648 states and 9044 transitions. Word has length 48 [2021-05-21 20:49:55,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:55,438 INFO L482 AbstractCegarLoop]: Abstraction has 3648 states and 9044 transitions. [2021-05-21 20:49:55,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:55,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3648 states and 9044 transitions. [2021-05-21 20:49:55,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:55,441 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:55,441 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:55,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-21 20:49:55,441 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:55,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:55,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1838280150, now seen corresponding path program 31 times [2021-05-21 20:49:55,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:55,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85039067] [2021-05-21 20:49:55,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:55,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:55,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85039067] [2021-05-21 20:49:55,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85039067] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:55,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:55,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:49:55,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877035060] [2021-05-21 20:49:55,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:55,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:55,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:55,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:55,489 INFO L87 Difference]: Start difference. First operand 3648 states and 9044 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:55,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:55,584 INFO L93 Difference]: Finished difference Result 4584 states and 11250 transitions. [2021-05-21 20:49:55,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:55,584 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:55,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:55,588 INFO L225 Difference]: With dead ends: 4584 [2021-05-21 20:49:55,588 INFO L226 Difference]: Without dead ends: 4534 [2021-05-21 20:49:55,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:55,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4534 states. [2021-05-21 20:49:55,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4534 to 3646. [2021-05-21 20:49:55,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3646 states, 3645 states have (on average 2.4790123456790125) internal successors, (9036), 3645 states have internal predecessors, (9036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 9036 transitions. [2021-05-21 20:49:55,636 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 9036 transitions. Word has length 48 [2021-05-21 20:49:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:55,636 INFO L482 AbstractCegarLoop]: Abstraction has 3646 states and 9036 transitions. [2021-05-21 20:49:55,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:55,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 9036 transitions. [2021-05-21 20:49:55,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:55,639 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:55,639 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:55,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-21 20:49:55,639 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:55,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:55,640 INFO L82 PathProgramCache]: Analyzing trace with hash -163243666, now seen corresponding path program 32 times [2021-05-21 20:49:55,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:55,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667103205] [2021-05-21 20:49:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:55,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:55,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667103205] [2021-05-21 20:49:55,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667103205] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:55,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:55,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:55,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785589902] [2021-05-21 20:49:55,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:49:55,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:55,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:49:55,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:49:55,683 INFO L87 Difference]: Start difference. First operand 3646 states and 9036 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:55,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:55,789 INFO L93 Difference]: Finished difference Result 4172 states and 10205 transitions. [2021-05-21 20:49:55,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:49:55,790 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:55,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:55,793 INFO L225 Difference]: With dead ends: 4172 [2021-05-21 20:49:55,793 INFO L226 Difference]: Without dead ends: 3835 [2021-05-21 20:49:55,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:49:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3835 states. [2021-05-21 20:49:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3835 to 3521. [2021-05-21 20:49:55,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3521 states, 3520 states have (on average 2.4607954545454547) internal successors, (8662), 3520 states have internal predecessors, (8662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:55,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3521 states to 3521 states and 8662 transitions. [2021-05-21 20:49:55,833 INFO L78 Accepts]: Start accepts. Automaton has 3521 states and 8662 transitions. Word has length 48 [2021-05-21 20:49:55,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:55,834 INFO L482 AbstractCegarLoop]: Abstraction has 3521 states and 8662 transitions. [2021-05-21 20:49:55,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:55,834 INFO L276 IsEmpty]: Start isEmpty. Operand 3521 states and 8662 transitions. [2021-05-21 20:49:55,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:55,836 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:55,836 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:55,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-21 20:49:55,836 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:55,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:55,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1076849684, now seen corresponding path program 33 times [2021-05-21 20:49:55,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:55,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064293983] [2021-05-21 20:49:55,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:55,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:55,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064293983] [2021-05-21 20:49:55,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064293983] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:55,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:55,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-21 20:49:55,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595144443] [2021-05-21 20:49:55,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:49:55,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:55,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:49:55,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:55,917 INFO L87 Difference]: Start difference. First operand 3521 states and 8662 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:56,095 INFO L93 Difference]: Finished difference Result 5134 states and 12499 transitions. [2021-05-21 20:49:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:56,095 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:56,098 INFO L225 Difference]: With dead ends: 5134 [2021-05-21 20:49:56,099 INFO L226 Difference]: Without dead ends: 4828 [2021-05-21 20:49:56,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:49:56,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2021-05-21 20:49:56,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 3954. [2021-05-21 20:49:56,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3954 states, 3953 states have (on average 2.437136352137617) internal successors, (9634), 3953 states have internal predecessors, (9634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:56,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3954 states to 3954 states and 9634 transitions. [2021-05-21 20:49:56,147 INFO L78 Accepts]: Start accepts. Automaton has 3954 states and 9634 transitions. Word has length 48 [2021-05-21 20:49:56,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:56,147 INFO L482 AbstractCegarLoop]: Abstraction has 3954 states and 9634 transitions. [2021-05-21 20:49:56,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:56,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3954 states and 9634 transitions. [2021-05-21 20:49:56,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:56,150 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:56,150 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:56,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-21 20:49:56,150 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:56,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:56,150 INFO L82 PathProgramCache]: Analyzing trace with hash 527044882, now seen corresponding path program 34 times [2021-05-21 20:49:56,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:56,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436578959] [2021-05-21 20:49:56,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:56,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:56,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436578959] [2021-05-21 20:49:56,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436578959] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:56,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:56,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-21 20:49:56,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716170800] [2021-05-21 20:49:56,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:49:56,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:56,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:49:56,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:56,223 INFO L87 Difference]: Start difference. First operand 3954 states and 9634 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:56,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:56,384 INFO L93 Difference]: Finished difference Result 4539 states and 10974 transitions. [2021-05-21 20:49:56,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:56,384 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:56,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:56,389 INFO L225 Difference]: With dead ends: 4539 [2021-05-21 20:49:56,390 INFO L226 Difference]: Without dead ends: 4187 [2021-05-21 20:49:56,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:49:56,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4187 states. [2021-05-21 20:49:56,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4187 to 3627. [2021-05-21 20:49:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 2.4332597904026474) internal successors, (8823), 3626 states have internal predecessors, (8823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:56,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 8823 transitions. [2021-05-21 20:49:56,441 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 8823 transitions. Word has length 48 [2021-05-21 20:49:56,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:56,441 INFO L482 AbstractCegarLoop]: Abstraction has 3627 states and 8823 transitions. [2021-05-21 20:49:56,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:56,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 8823 transitions. [2021-05-21 20:49:56,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:56,445 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:56,445 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:56,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-21 20:49:56,445 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:56,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:56,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1279163436, now seen corresponding path program 35 times [2021-05-21 20:49:56,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:56,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002059651] [2021-05-21 20:49:56,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:56,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:56,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002059651] [2021-05-21 20:49:56,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002059651] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:56,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:56,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-21 20:49:56,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057207551] [2021-05-21 20:49:56,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:49:56,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:56,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:49:56,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:56,538 INFO L87 Difference]: Start difference. First operand 3627 states and 8823 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:56,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:56,704 INFO L93 Difference]: Finished difference Result 4198 states and 10112 transitions. [2021-05-21 20:49:56,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:56,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:56,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:56,708 INFO L225 Difference]: With dead ends: 4198 [2021-05-21 20:49:56,708 INFO L226 Difference]: Without dead ends: 3945 [2021-05-21 20:49:56,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:49:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3945 states. [2021-05-21 20:49:56,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3945 to 3587. [2021-05-21 20:49:56,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 2.4121583937534856) internal successors, (8650), 3586 states have internal predecessors, (8650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:56,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 8650 transitions. [2021-05-21 20:49:56,774 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 8650 transitions. Word has length 48 [2021-05-21 20:49:56,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:56,774 INFO L482 AbstractCegarLoop]: Abstraction has 3587 states and 8650 transitions. [2021-05-21 20:49:56,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:56,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 8650 transitions. [2021-05-21 20:49:56,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:56,776 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:56,776 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:56,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-21 20:49:56,776 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:56,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:56,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1828968238, now seen corresponding path program 36 times [2021-05-21 20:49:56,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:56,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109042425] [2021-05-21 20:49:56,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:56,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:56,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109042425] [2021-05-21 20:49:56,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109042425] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:56,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:56,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-21 20:49:56,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763330152] [2021-05-21 20:49:56,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:49:56,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:56,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:49:56,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:56,849 INFO L87 Difference]: Start difference. First operand 3587 states and 8650 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:56,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:56,990 INFO L93 Difference]: Finished difference Result 3868 states and 9238 transitions. [2021-05-21 20:49:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:56,991 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:56,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:56,993 INFO L225 Difference]: With dead ends: 3868 [2021-05-21 20:49:56,993 INFO L226 Difference]: Without dead ends: 3069 [2021-05-21 20:49:56,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:49:57,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-05-21 20:49:57,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 2756. [2021-05-21 20:49:57,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2755 states have (on average 2.3731397459165153) internal successors, (6538), 2755 states have internal predecessors, (6538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:57,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 6538 transitions. [2021-05-21 20:49:57,021 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 6538 transitions. Word has length 48 [2021-05-21 20:49:57,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:57,021 INFO L482 AbstractCegarLoop]: Abstraction has 2756 states and 6538 transitions. [2021-05-21 20:49:57,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:57,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 6538 transitions. [2021-05-21 20:49:57,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:57,023 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:57,023 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:57,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-21 20:49:57,023 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:57,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:57,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1684872736, now seen corresponding path program 37 times [2021-05-21 20:49:57,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:57,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431609423] [2021-05-21 20:49:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:57,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:57,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431609423] [2021-05-21 20:49:57,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431609423] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:57,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:57,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-21 20:49:57,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299614922] [2021-05-21 20:49:57,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:49:57,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:57,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:49:57,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:57,150 INFO L87 Difference]: Start difference. First operand 2756 states and 6538 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:57,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:57,448 INFO L93 Difference]: Finished difference Result 3824 states and 8912 transitions. [2021-05-21 20:49:57,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:49:57,449 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:57,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:57,452 INFO L225 Difference]: With dead ends: 3824 [2021-05-21 20:49:57,452 INFO L226 Difference]: Without dead ends: 3670 [2021-05-21 20:49:57,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:49:57,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2021-05-21 20:49:57,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 2683. [2021-05-21 20:49:57,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2683 states, 2682 states have (on average 2.3732289336316184) internal successors, (6365), 2682 states have internal predecessors, (6365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:57,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2683 states to 2683 states and 6365 transitions. [2021-05-21 20:49:57,486 INFO L78 Accepts]: Start accepts. Automaton has 2683 states and 6365 transitions. Word has length 48 [2021-05-21 20:49:57,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:57,486 INFO L482 AbstractCegarLoop]: Abstraction has 2683 states and 6365 transitions. [2021-05-21 20:49:57,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:57,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2683 states and 6365 transitions. [2021-05-21 20:49:57,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:57,488 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:57,488 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:57,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-21 20:49:57,489 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:57,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:57,489 INFO L82 PathProgramCache]: Analyzing trace with hash -567074070, now seen corresponding path program 38 times [2021-05-21 20:49:57,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:57,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734666734] [2021-05-21 20:49:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:57,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:57,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734666734] [2021-05-21 20:49:57,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734666734] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:57,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:57,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-21 20:49:57,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034459192] [2021-05-21 20:49:57,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:49:57,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:57,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:49:57,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:57,590 INFO L87 Difference]: Start difference. First operand 2683 states and 6365 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:57,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:57,792 INFO L93 Difference]: Finished difference Result 3008 states and 7066 transitions. [2021-05-21 20:49:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:49:57,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:57,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:57,795 INFO L225 Difference]: With dead ends: 3008 [2021-05-21 20:49:57,795 INFO L226 Difference]: Without dead ends: 2882 [2021-05-21 20:49:57,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:49:57,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2021-05-21 20:49:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2536. [2021-05-21 20:49:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2536 states, 2535 states have (on average 2.3846153846153846) internal successors, (6045), 2535 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 6045 transitions. [2021-05-21 20:49:57,822 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 6045 transitions. Word has length 48 [2021-05-21 20:49:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:57,822 INFO L482 AbstractCegarLoop]: Abstraction has 2536 states and 6045 transitions. [2021-05-21 20:49:57,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 6045 transitions. [2021-05-21 20:49:57,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:57,824 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:57,824 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:57,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-21 20:49:57,824 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:57,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:57,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1527737234, now seen corresponding path program 39 times [2021-05-21 20:49:57,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:57,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167999622] [2021-05-21 20:49:57,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:57,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:57,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167999622] [2021-05-21 20:49:57,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167999622] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:57,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:57,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:57,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549836565] [2021-05-21 20:49:57,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:49:57,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:57,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:49:57,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:49:57,871 INFO L87 Difference]: Start difference. First operand 2536 states and 6045 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:57,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:57,976 INFO L93 Difference]: Finished difference Result 2784 states and 6562 transitions. [2021-05-21 20:49:57,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:49:57,976 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:57,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:57,978 INFO L225 Difference]: With dead ends: 2784 [2021-05-21 20:49:57,978 INFO L226 Difference]: Without dead ends: 2272 [2021-05-21 20:49:57,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:49:57,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-05-21 20:49:57,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1997. [2021-05-21 20:49:57,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1997 states, 1996 states have (on average 2.3456913827655312) internal successors, (4682), 1996 states have internal predecessors, (4682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:57,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 4682 transitions. [2021-05-21 20:49:57,999 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 4682 transitions. Word has length 48 [2021-05-21 20:49:57,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:57,999 INFO L482 AbstractCegarLoop]: Abstraction has 1997 states and 4682 transitions. [2021-05-21 20:49:57,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:57,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 4682 transitions. [2021-05-21 20:49:58,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:58,000 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:58,000 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:58,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-21 20:49:58,001 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:58,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:58,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1742602862, now seen corresponding path program 40 times [2021-05-21 20:49:58,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:58,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546102394] [2021-05-21 20:49:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:58,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:58,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546102394] [2021-05-21 20:49:58,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546102394] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:58,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:58,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 20:49:58,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641211518] [2021-05-21 20:49:58,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:49:58,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:58,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:49:58,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:58,060 INFO L87 Difference]: Start difference. First operand 1997 states and 4682 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:58,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:58,167 INFO L93 Difference]: Finished difference Result 1924 states and 4439 transitions. [2021-05-21 20:49:58,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:58,168 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:58,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:58,169 INFO L225 Difference]: With dead ends: 1924 [2021-05-21 20:49:58,169 INFO L226 Difference]: Without dead ends: 1708 [2021-05-21 20:49:58,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:58,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2021-05-21 20:49:58,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1708. [2021-05-21 20:49:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.3134153485647335) internal successors, (3949), 1707 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:58,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 3949 transitions. [2021-05-21 20:49:58,185 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 3949 transitions. Word has length 48 [2021-05-21 20:49:58,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:58,185 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 3949 transitions. [2021-05-21 20:49:58,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:58,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 3949 transitions. [2021-05-21 20:49:58,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:58,187 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:58,187 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:58,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-21 20:49:58,187 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:58,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:58,187 INFO L82 PathProgramCache]: Analyzing trace with hash 668037194, now seen corresponding path program 41 times [2021-05-21 20:49:58,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:58,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805211671] [2021-05-21 20:49:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:58,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:58,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805211671] [2021-05-21 20:49:58,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805211671] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:58,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:58,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 20:49:58,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618983342] [2021-05-21 20:49:58,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:49:58,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:58,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:49:58,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:58,243 INFO L87 Difference]: Start difference. First operand 1708 states and 3949 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:58,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:58,317 INFO L93 Difference]: Finished difference Result 2079 states and 4726 transitions. [2021-05-21 20:49:58,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:49:58,318 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:58,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:58,319 INFO L225 Difference]: With dead ends: 2079 [2021-05-21 20:49:58,319 INFO L226 Difference]: Without dead ends: 1763 [2021-05-21 20:49:58,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:58,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-05-21 20:49:58,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1561. [2021-05-21 20:49:58,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.2788461538461537) internal successors, (3555), 1560 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 3555 transitions. [2021-05-21 20:49:58,337 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 3555 transitions. Word has length 48 [2021-05-21 20:49:58,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:58,337 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 3555 transitions. [2021-05-21 20:49:58,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:58,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 3555 transitions. [2021-05-21 20:49:58,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:58,338 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:58,338 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:58,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-21 20:49:58,339 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:58,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:58,339 INFO L82 PathProgramCache]: Analyzing trace with hash -543361422, now seen corresponding path program 42 times [2021-05-21 20:49:58,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:58,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904160809] [2021-05-21 20:49:58,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:58,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:58,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904160809] [2021-05-21 20:49:58,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904160809] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:58,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:58,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:49:58,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368049508] [2021-05-21 20:49:58,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:58,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:58,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:58,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:58,384 INFO L87 Difference]: Start difference. First operand 1561 states and 3555 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:58,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:58,459 INFO L93 Difference]: Finished difference Result 1567 states and 3496 transitions. [2021-05-21 20:49:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:49:58,460 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:58,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:58,461 INFO L225 Difference]: With dead ends: 1567 [2021-05-21 20:49:58,461 INFO L226 Difference]: Without dead ends: 1281 [2021-05-21 20:49:58,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:49:58,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-05-21 20:49:58,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2021-05-21 20:49:58,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 2.2234375) internal successors, (2846), 1280 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:58,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 2846 transitions. [2021-05-21 20:49:58,475 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 2846 transitions. Word has length 48 [2021-05-21 20:49:58,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:58,476 INFO L482 AbstractCegarLoop]: Abstraction has 1281 states and 2846 transitions. [2021-05-21 20:49:58,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:58,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 2846 transitions. [2021-05-21 20:49:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:58,478 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:58,478 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:58,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-21 20:49:58,478 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:58,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:58,478 INFO L82 PathProgramCache]: Analyzing trace with hash 630703062, now seen corresponding path program 43 times [2021-05-21 20:49:58,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:58,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038412554] [2021-05-21 20:49:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:58,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:58,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038412554] [2021-05-21 20:49:58,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038412554] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:58,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:58,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 20:49:58,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345614113] [2021-05-21 20:49:58,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:49:58,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:58,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:49:58,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:58,518 INFO L87 Difference]: Start difference. First operand 1281 states and 2846 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:58,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:58,565 INFO L93 Difference]: Finished difference Result 996 states and 2169 transitions. [2021-05-21 20:49:58,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:58,566 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:58,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:58,566 INFO L225 Difference]: With dead ends: 996 [2021-05-21 20:49:58,566 INFO L226 Difference]: Without dead ends: 423 [2021-05-21 20:49:58,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:58,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-21 20:49:58,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 363. [2021-05-21 20:49:58,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.1270718232044197) internal successors, (770), 362 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:58,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 770 transitions. [2021-05-21 20:49:58,569 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 770 transitions. Word has length 48 [2021-05-21 20:49:58,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:58,570 INFO L482 AbstractCegarLoop]: Abstraction has 363 states and 770 transitions. [2021-05-21 20:49:58,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:58,570 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 770 transitions. [2021-05-21 20:49:58,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-21 20:49:58,570 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:58,570 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:58,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-21 20:49:58,570 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:58,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:58,570 INFO L82 PathProgramCache]: Analyzing trace with hash -301103428, now seen corresponding path program 44 times [2021-05-21 20:49:58,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:58,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868284763] [2021-05-21 20:49:58,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:58,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:58,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868284763] [2021-05-21 20:49:58,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868284763] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:58,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:58,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:49:58,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097131228] [2021-05-21 20:49:58,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:58,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:58,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:58,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:58,628 INFO L87 Difference]: Start difference. First operand 363 states and 770 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:58,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:58,721 INFO L93 Difference]: Finished difference Result 343 states and 732 transitions. [2021-05-21 20:49:58,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:49:58,721 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-05-21 20:49:58,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:58,721 INFO L225 Difference]: With dead ends: 343 [2021-05-21 20:49:58,721 INFO L226 Difference]: Without dead ends: 0 [2021-05-21 20:49:58,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-21 20:49:58,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-21 20:49:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:58,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-21 20:49:58,722 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2021-05-21 20:49:58,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:58,722 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-21 20:49:58,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:58,722 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-21 20:49:58,722 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-21 20:49:58,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-21 20:49:58,724 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 20:49:58,725 INFO L202 PluginConnector]: Adding new model bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 08:49:58 BasicIcfg [2021-05-21 20:49:58,725 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 20:49:58,726 INFO L168 Benchmark]: Toolchain (without parser) took 16319.29 ms. Allocated memory was 343.9 MB in the beginning and 1.2 GB in the end (delta: 813.7 MB). Free memory was 323.4 MB in the beginning and 1.1 GB in the end (delta: -762.8 MB). Peak memory consumption was 53.8 MB. Max. memory is 16.0 GB. [2021-05-21 20:49:58,726 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 343.9 MB. Free memory was 324.6 MB in the beginning and 324.5 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:49:58,726 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.78 ms. Allocated memory is still 343.9 MB. Free memory was 323.3 MB in the beginning and 321.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:49:58,726 INFO L168 Benchmark]: Boogie Preprocessor took 10.64 ms. Allocated memory is still 343.9 MB. Free memory was 321.8 MB in the beginning and 320.8 MB in the end (delta: 977.7 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-05-21 20:49:58,726 INFO L168 Benchmark]: RCFGBuilder took 185.88 ms. Allocated memory is still 343.9 MB. Free memory was 320.7 MB in the beginning and 306.7 MB in the end (delta: 14.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-21 20:49:58,726 INFO L168 Benchmark]: TraceAbstraction took 16098.65 ms. Allocated memory was 343.9 MB in the beginning and 1.2 GB in the end (delta: 813.7 MB). Free memory was 306.3 MB in the beginning and 1.1 GB in the end (delta: -779.9 MB). Peak memory consumption was 34.9 MB. Max. memory is 16.0 GB. [2021-05-21 20:49:58,726 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 343.9 MB. Free memory was 324.6 MB in the beginning and 324.5 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.78 ms. Allocated memory is still 343.9 MB. Free memory was 323.3 MB in the beginning and 321.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.64 ms. Allocated memory is still 343.9 MB. Free memory was 321.8 MB in the beginning and 320.8 MB in the end (delta: 977.7 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 185.88 ms. Allocated memory is still 343.9 MB. Free memory was 320.7 MB in the beginning and 306.7 MB in the end (delta: 14.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 16098.65 ms. Allocated memory was 343.9 MB in the beginning and 1.2 GB in the end (delta: 813.7 MB). Free memory was 306.3 MB in the beginning and 1.1 GB in the end (delta: -779.9 MB). Peak memory consumption was 34.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 82]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 99 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15986.0ms, OverallIterations: 44, TraceHistogramMax: 1, EmptinessCheckTime: 214.0ms, AutomataDifference: 8481.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 138.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4543 SDtfs, 8036 SDslu, 18000 SDs, 0 SdLazy, 10928 SolverSat, 1866 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4390.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 574 GetRequests, 68 SyntacticMatches, 28 SemanticMatches, 478 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 3945.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6383occurred in iteration=15, InterpolantAutomatonStates: 466, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3140.8ms AutomataMinimizationTime, 44 MinimizatonAttempts, 50804 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 41.7ms SsaConstructionTime, 205.5ms SatisfiabilityAnalysisTime, 3534.6ms InterpolantComputationTime, 2112 NumberOfCodeBlocks, 2112 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 2068 ConstructedInterpolants, 0 QuantifiedInterpolants, 12895 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 44 InterpolantComputations, 44 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...