/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:23:19,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:23:19,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:23:19,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:23:19,227 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-Separate.epf [2021-05-22 02:23:19,256 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:23:19,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:23:19,257 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:23:19,257 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:23:19,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:23:19,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:23:19,259 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:23:19,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:23:19,260 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:23:19,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:23:19,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:23:19,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:23:19,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:23:19,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:23:19,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:23:19,261 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:23:19,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:23:19,261 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:23:19,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:23:19,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:23:19,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:23:19,261 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:23:19,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:23:19,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:23:19,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:23:19,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:23:19,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:23:19,262 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:23:19,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:23:19,262 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:23:19,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:23:19,262 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:23:19,263 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:23:19,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:23:19,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:23:19,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:23:19,546 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:23:19,548 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:23:19,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-trans.wvr.bpl [2021-05-22 02:23:19,549 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-trans.wvr.bpl' [2021-05-22 02:23:19,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:23:19,592 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:23:19,593 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:23:19,593 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:23:19,593 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:23:19,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:19" (1/1) ... [2021-05-22 02:23:19,618 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:19" (1/1) ... [2021-05-22 02:23:19,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:23:19,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:23:19,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:23:19,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:23:19,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:19" (1/1) ... [2021-05-22 02:23:19,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:19" (1/1) ... [2021-05-22 02:23:19,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:19" (1/1) ... [2021-05-22 02:23:19,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:19" (1/1) ... [2021-05-22 02:23:19,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:19" (1/1) ... [2021-05-22 02:23:19,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:19" (1/1) ... [2021-05-22 02:23:19,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:19" (1/1) ... [2021-05-22 02:23:19,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:23:19,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:23:19,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:23:19,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:23:19,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:19" (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 [2021-05-22 02:23:19,714 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:23:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:23:19,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:23:19,715 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:23:19,715 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:23:19,715 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:23:19,715 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:23:19,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:23:19,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:23:19,715 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:23:19,715 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:23:19,715 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:23:19,716 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:23:20,018 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:23:20,019 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-22 02:23:20,020 INFO L202 PluginConnector]: Adding new model word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:23:20 BoogieIcfgContainer [2021-05-22 02:23:20,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:23:20,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:23:20,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:23:20,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:23:20,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:19" (1/2) ... [2021-05-22 02:23:20,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d95b6bb and model type word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:23:20, skipping insertion in model container [2021-05-22 02:23:20,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:23:20" (2/2) ... [2021-05-22 02:23:20,025 INFO L111 eAbstractionObserver]: Analyzing ICFG word-trans.wvr.bpl [2021-05-22 02:23:20,028 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:23:20,029 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:23:20,029 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:23:20,029 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:23:20,064 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-22 02:23:20,079 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:23:20,104 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:23:20,104 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:23:20,104 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:23:20,104 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:23:20,104 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:23:20,104 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:23:20,104 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:23:20,104 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:23:20,112 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2021-05-22 02:23:20,131 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:20,132 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:20,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:23:20,141 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:20,142 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:20,143 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:20,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:20,147 INFO L82 PathProgramCache]: Analyzing trace with hash -200100504, now seen corresponding path program 1 times [2021-05-22 02:23:20,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:20,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917958857] [2021-05-22 02:23:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:20,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:20,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917958857] [2021-05-22 02:23:20,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917958857] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:20,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:20,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:20,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022817001] [2021-05-22 02:23:20,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:20,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:20,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:20,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:20,409 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:20,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:20,506 INFO L93 Difference]: Finished difference Result 230 states and 687 transitions. [2021-05-22 02:23:20,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:20,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:23:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:20,519 INFO L225 Difference]: With dead ends: 230 [2021-05-22 02:23:20,520 INFO L226 Difference]: Without dead ends: 215 [2021-05-22 02:23:20,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:20,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-22 02:23:20,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 126. [2021-05-22 02:23:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.368) internal successors, (421), 125 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:20,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 421 transitions. [2021-05-22 02:23:20,552 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 421 transitions. Word has length 14 [2021-05-22 02:23:20,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:20,553 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 421 transitions. [2021-05-22 02:23:20,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:20,553 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 421 transitions. [2021-05-22 02:23:20,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:23:20,554 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:20,555 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:20,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:23:20,555 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:20,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:20,556 INFO L82 PathProgramCache]: Analyzing trace with hash -393107442, now seen corresponding path program 2 times [2021-05-22 02:23:20,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:20,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926423743] [2021-05-22 02:23:20,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:20,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:20,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926423743] [2021-05-22 02:23:20,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926423743] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:20,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:20,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:20,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553370278] [2021-05-22 02:23:20,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:20,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:20,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:20,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:20,626 INFO L87 Difference]: Start difference. First operand 126 states and 421 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:20,747 INFO L93 Difference]: Finished difference Result 257 states and 779 transitions. [2021-05-22 02:23:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:20,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:23:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:20,749 INFO L225 Difference]: With dead ends: 257 [2021-05-22 02:23:20,750 INFO L226 Difference]: Without dead ends: 242 [2021-05-22 02:23:20,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-22 02:23:20,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 132. [2021-05-22 02:23:20,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.312977099236641) internal successors, (434), 131 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:20,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 434 transitions. [2021-05-22 02:23:20,761 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 434 transitions. Word has length 14 [2021-05-22 02:23:20,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:20,761 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 434 transitions. [2021-05-22 02:23:20,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:20,761 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 434 transitions. [2021-05-22 02:23:20,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:23:20,762 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:20,762 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:20,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:23:20,763 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:20,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:20,763 INFO L82 PathProgramCache]: Analyzing trace with hash 463457742, now seen corresponding path program 3 times [2021-05-22 02:23:20,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:20,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112421296] [2021-05-22 02:23:20,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:20,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:20,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112421296] [2021-05-22 02:23:20,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112421296] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:20,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:20,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:20,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712171217] [2021-05-22 02:23:20,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:20,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:20,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:20,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:20,843 INFO L87 Difference]: Start difference. First operand 132 states and 434 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:20,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:20,920 INFO L93 Difference]: Finished difference Result 244 states and 710 transitions. [2021-05-22 02:23:20,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:20,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:23:20,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:20,928 INFO L225 Difference]: With dead ends: 244 [2021-05-22 02:23:20,929 INFO L226 Difference]: Without dead ends: 229 [2021-05-22 02:23:20,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:20,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-22 02:23:20,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 136. [2021-05-22 02:23:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.3333333333333335) internal successors, (450), 135 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:20,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 450 transitions. [2021-05-22 02:23:20,944 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 450 transitions. Word has length 14 [2021-05-22 02:23:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:20,944 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 450 transitions. [2021-05-22 02:23:20,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:20,944 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 450 transitions. [2021-05-22 02:23:20,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:23:20,948 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:20,949 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:20,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:23:20,949 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:20,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:20,949 INFO L82 PathProgramCache]: Analyzing trace with hash 332136738, now seen corresponding path program 4 times [2021-05-22 02:23:20,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:20,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939424645] [2021-05-22 02:23:20,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:21,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:21,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939424645] [2021-05-22 02:23:21,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939424645] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:21,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:21,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:21,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464534636] [2021-05-22 02:23:21,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:21,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:21,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:21,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:21,009 INFO L87 Difference]: Start difference. First operand 136 states and 450 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:21,082 INFO L93 Difference]: Finished difference Result 251 states and 743 transitions. [2021-05-22 02:23:21,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:21,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:23:21,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:21,084 INFO L225 Difference]: With dead ends: 251 [2021-05-22 02:23:21,084 INFO L226 Difference]: Without dead ends: 236 [2021-05-22 02:23:21,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:21,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-22 02:23:21,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 140. [2021-05-22 02:23:21,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2021-05-22 02:23:21,091 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2021-05-22 02:23:21,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:21,091 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2021-05-22 02:23:21,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,091 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2021-05-22 02:23:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:23:21,092 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:21,092 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:21,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:23:21,092 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:21,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:21,093 INFO L82 PathProgramCache]: Analyzing trace with hash -515835448, now seen corresponding path program 5 times [2021-05-22 02:23:21,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:21,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960159316] [2021-05-22 02:23:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:21,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:21,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960159316] [2021-05-22 02:23:21,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960159316] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:21,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:21,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:21,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342604113] [2021-05-22 02:23:21,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:21,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:21,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:21,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:21,128 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:21,198 INFO L93 Difference]: Finished difference Result 279 states and 867 transitions. [2021-05-22 02:23:21,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:21,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:23:21,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:21,200 INFO L225 Difference]: With dead ends: 279 [2021-05-22 02:23:21,200 INFO L226 Difference]: Without dead ends: 264 [2021-05-22 02:23:21,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:21,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-22 02:23:21,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 142. [2021-05-22 02:23:21,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-05-22 02:23:21,219 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-05-22 02:23:21,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:21,219 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-05-22 02:23:21,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-05-22 02:23:21,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:23:21,223 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:21,223 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:21,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:23:21,223 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:21,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:21,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1214544498, now seen corresponding path program 6 times [2021-05-22 02:23:21,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:21,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645131803] [2021-05-22 02:23:21,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:21,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:21,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645131803] [2021-05-22 02:23:21,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645131803] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:21,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:21,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:21,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205920992] [2021-05-22 02:23:21,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:21,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:21,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:21,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:21,281 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:21,355 INFO L93 Difference]: Finished difference Result 270 states and 831 transitions. [2021-05-22 02:23:21,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:21,356 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:23:21,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:21,357 INFO L225 Difference]: With dead ends: 270 [2021-05-22 02:23:21,357 INFO L226 Difference]: Without dead ends: 255 [2021-05-22 02:23:21,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:21,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-22 02:23:21,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 142. [2021-05-22 02:23:21,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-05-22 02:23:21,363 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-05-22 02:23:21,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:21,363 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-05-22 02:23:21,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,363 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-05-22 02:23:21,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:21,364 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:21,364 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:21,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 02:23:21,364 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:21,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:21,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1927039172, now seen corresponding path program 1 times [2021-05-22 02:23:21,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:21,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556009338] [2021-05-22 02:23:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:21,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:21,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556009338] [2021-05-22 02:23:21,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556009338] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:21,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:21,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:21,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455048262] [2021-05-22 02:23:21,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:21,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:21,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:21,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:21,421 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:21,488 INFO L93 Difference]: Finished difference Result 280 states and 843 transitions. [2021-05-22 02:23:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:21,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:23:21,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:21,490 INFO L225 Difference]: With dead ends: 280 [2021-05-22 02:23:21,490 INFO L226 Difference]: Without dead ends: 259 [2021-05-22 02:23:21,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:21,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-05-22 02:23:21,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 147. [2021-05-22 02:23:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.3219178082191783) internal successors, (485), 146 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 485 transitions. [2021-05-22 02:23:21,496 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 485 transitions. Word has length 15 [2021-05-22 02:23:21,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:21,496 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 485 transitions. [2021-05-22 02:23:21,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,496 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 485 transitions. [2021-05-22 02:23:21,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:21,497 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:21,497 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:21,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:23:21,497 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:21,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:21,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1938853291, now seen corresponding path program 1 times [2021-05-22 02:23:21,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:21,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340940854] [2021-05-22 02:23:21,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:21,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:21,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340940854] [2021-05-22 02:23:21,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340940854] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:21,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:21,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:21,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396739148] [2021-05-22 02:23:21,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:21,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:21,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:21,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:21,567 INFO L87 Difference]: Start difference. First operand 147 states and 485 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:21,624 INFO L93 Difference]: Finished difference Result 262 states and 767 transitions. [2021-05-22 02:23:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:21,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:23:21,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:21,625 INFO L225 Difference]: With dead ends: 262 [2021-05-22 02:23:21,625 INFO L226 Difference]: Without dead ends: 229 [2021-05-22 02:23:21,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:21,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-22 02:23:21,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 147. [2021-05-22 02:23:21,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.287671232876712) internal successors, (480), 146 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 480 transitions. [2021-05-22 02:23:21,630 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 480 transitions. Word has length 15 [2021-05-22 02:23:21,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:21,631 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 480 transitions. [2021-05-22 02:23:21,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,631 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 480 transitions. [2021-05-22 02:23:21,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:21,631 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:21,631 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:21,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 02:23:21,632 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:21,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1727583463, now seen corresponding path program 2 times [2021-05-22 02:23:21,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:21,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311144876] [2021-05-22 02:23:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:21,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:21,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311144876] [2021-05-22 02:23:21,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311144876] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:21,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:21,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:21,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837524390] [2021-05-22 02:23:21,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:21,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:21,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:21,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:21,672 INFO L87 Difference]: Start difference. First operand 147 states and 480 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:21,755 INFO L93 Difference]: Finished difference Result 278 states and 838 transitions. [2021-05-22 02:23:21,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:21,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:23:21,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:21,757 INFO L225 Difference]: With dead ends: 278 [2021-05-22 02:23:21,757 INFO L226 Difference]: Without dead ends: 256 [2021-05-22 02:23:21,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:21,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-22 02:23:21,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 150. [2021-05-22 02:23:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 3.295302013422819) internal successors, (491), 149 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 491 transitions. [2021-05-22 02:23:21,762 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 491 transitions. Word has length 15 [2021-05-22 02:23:21,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:21,762 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 491 transitions. [2021-05-22 02:23:21,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,762 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 491 transitions. [2021-05-22 02:23:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:21,763 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:21,763 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:21,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 02:23:21,763 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:21,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:21,763 INFO L82 PathProgramCache]: Analyzing trace with hash -258187012, now seen corresponding path program 2 times [2021-05-22 02:23:21,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:21,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140572362] [2021-05-22 02:23:21,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:21,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:21,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140572362] [2021-05-22 02:23:21,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140572362] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:21,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:21,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:21,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718938477] [2021-05-22 02:23:21,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:21,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:21,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:21,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:21,800 INFO L87 Difference]: Start difference. First operand 150 states and 491 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:21,858 INFO L93 Difference]: Finished difference Result 281 states and 840 transitions. [2021-05-22 02:23:21,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:21,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:23:21,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:21,860 INFO L225 Difference]: With dead ends: 281 [2021-05-22 02:23:21,860 INFO L226 Difference]: Without dead ends: 254 [2021-05-22 02:23:21,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:21,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-22 02:23:21,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 150. [2021-05-22 02:23:21,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 3.2751677852348995) internal successors, (488), 149 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 488 transitions. [2021-05-22 02:23:21,864 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 488 transitions. Word has length 15 [2021-05-22 02:23:21,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:21,864 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 488 transitions. [2021-05-22 02:23:21,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,865 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 488 transitions. [2021-05-22 02:23:21,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:21,865 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:21,865 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:21,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 02:23:21,865 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:21,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:21,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1713787741, now seen corresponding path program 1 times [2021-05-22 02:23:21,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:21,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332006969] [2021-05-22 02:23:21,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:21,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:21,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332006969] [2021-05-22 02:23:21,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332006969] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:21,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:21,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:21,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255915762] [2021-05-22 02:23:21,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:21,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:21,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:21,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:21,886 INFO L87 Difference]: Start difference. First operand 150 states and 488 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:21,929 INFO L93 Difference]: Finished difference Result 281 states and 835 transitions. [2021-05-22 02:23:21,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:21,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:23:21,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:21,931 INFO L225 Difference]: With dead ends: 281 [2021-05-22 02:23:21,931 INFO L226 Difference]: Without dead ends: 262 [2021-05-22 02:23:21,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:21,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-22 02:23:21,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 154. [2021-05-22 02:23:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 3.281045751633987) internal successors, (502), 153 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 502 transitions. [2021-05-22 02:23:21,936 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 502 transitions. Word has length 15 [2021-05-22 02:23:21,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:21,936 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 502 transitions. [2021-05-22 02:23:21,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,936 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 502 transitions. [2021-05-22 02:23:21,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:21,936 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:21,936 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:21,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-22 02:23:21,937 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:21,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:21,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1520780803, now seen corresponding path program 2 times [2021-05-22 02:23:21,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:21,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149537585] [2021-05-22 02:23:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:21,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:21,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149537585] [2021-05-22 02:23:21,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149537585] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:21,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:21,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:21,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265576821] [2021-05-22 02:23:21,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:21,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:21,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:21,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:21,958 INFO L87 Difference]: Start difference. First operand 154 states and 502 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:22,014 INFO L93 Difference]: Finished difference Result 373 states and 1108 transitions. [2021-05-22 02:23:22,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:22,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:23:22,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:22,015 INFO L225 Difference]: With dead ends: 373 [2021-05-22 02:23:22,016 INFO L226 Difference]: Without dead ends: 354 [2021-05-22 02:23:22,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:22,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-05-22 02:23:22,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 156. [2021-05-22 02:23:22,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 3.2838709677419353) internal successors, (509), 155 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 509 transitions. [2021-05-22 02:23:22,021 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 509 transitions. Word has length 15 [2021-05-22 02:23:22,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:22,021 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 509 transitions. [2021-05-22 02:23:22,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,021 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 509 transitions. [2021-05-22 02:23:22,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:22,021 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:22,021 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:22,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-22 02:23:22,022 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:22,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:22,022 INFO L82 PathProgramCache]: Analyzing trace with hash -473139912, now seen corresponding path program 3 times [2021-05-22 02:23:22,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:22,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688324998] [2021-05-22 02:23:22,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:22,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:22,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688324998] [2021-05-22 02:23:22,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688324998] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:22,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:22,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:22,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742565512] [2021-05-22 02:23:22,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:22,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:22,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:22,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:22,042 INFO L87 Difference]: Start difference. First operand 156 states and 509 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:22,083 INFO L93 Difference]: Finished difference Result 298 states and 879 transitions. [2021-05-22 02:23:22,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:22,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:23:22,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:22,084 INFO L225 Difference]: With dead ends: 298 [2021-05-22 02:23:22,085 INFO L226 Difference]: Without dead ends: 277 [2021-05-22 02:23:22,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:22,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-05-22 02:23:22,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 156. [2021-05-22 02:23:22,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 3.2838709677419353) internal successors, (509), 155 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 509 transitions. [2021-05-22 02:23:22,089 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 509 transitions. Word has length 15 [2021-05-22 02:23:22,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:22,089 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 509 transitions. [2021-05-22 02:23:22,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,089 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 509 transitions. [2021-05-22 02:23:22,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:22,090 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:22,090 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:22,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-22 02:23:22,090 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:22,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:22,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1293754188, now seen corresponding path program 4 times [2021-05-22 02:23:22,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:22,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921143978] [2021-05-22 02:23:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:22,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:22,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921143978] [2021-05-22 02:23:22,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921143978] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:22,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:22,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:22,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904871121] [2021-05-22 02:23:22,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:22,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:22,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:22,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:22,114 INFO L87 Difference]: Start difference. First operand 156 states and 509 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:22,170 INFO L93 Difference]: Finished difference Result 353 states and 1040 transitions. [2021-05-22 02:23:22,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:22,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:23:22,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:22,172 INFO L225 Difference]: With dead ends: 353 [2021-05-22 02:23:22,172 INFO L226 Difference]: Without dead ends: 332 [2021-05-22 02:23:22,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:22,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-05-22 02:23:22,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 154. [2021-05-22 02:23:22,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 3.2679738562091503) internal successors, (500), 153 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 500 transitions. [2021-05-22 02:23:22,177 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 500 transitions. Word has length 15 [2021-05-22 02:23:22,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:22,177 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 500 transitions. [2021-05-22 02:23:22,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,177 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 500 transitions. [2021-05-22 02:23:22,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:22,177 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:22,178 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:22,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-22 02:23:22,178 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:22,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:22,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1451583151, now seen corresponding path program 3 times [2021-05-22 02:23:22,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:22,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3893278] [2021-05-22 02:23:22,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:22,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:22,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3893278] [2021-05-22 02:23:22,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3893278] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:22,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:22,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:22,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586299057] [2021-05-22 02:23:22,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:22,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:22,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:22,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:22,207 INFO L87 Difference]: Start difference. First operand 154 states and 500 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:22,243 INFO L93 Difference]: Finished difference Result 281 states and 800 transitions. [2021-05-22 02:23:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:22,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:23:22,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:22,244 INFO L225 Difference]: With dead ends: 281 [2021-05-22 02:23:22,244 INFO L226 Difference]: Without dead ends: 248 [2021-05-22 02:23:22,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:22,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-22 02:23:22,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 158. [2021-05-22 02:23:22,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.261146496815287) internal successors, (512), 157 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 512 transitions. [2021-05-22 02:23:22,248 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 512 transitions. Word has length 15 [2021-05-22 02:23:22,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:22,248 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 512 transitions. [2021-05-22 02:23:22,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,249 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 512 transitions. [2021-05-22 02:23:22,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:22,249 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:22,249 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:22,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-22 02:23:22,249 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:22,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:22,250 INFO L82 PathProgramCache]: Analyzing trace with hash 372369077, now seen corresponding path program 3 times [2021-05-22 02:23:22,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:22,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766019601] [2021-05-22 02:23:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:22,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:22,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:22,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766019601] [2021-05-22 02:23:22,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766019601] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:22,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:22,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:22,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100723387] [2021-05-22 02:23:22,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:22,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:22,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:22,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:22,283 INFO L87 Difference]: Start difference. First operand 158 states and 512 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:22,345 INFO L93 Difference]: Finished difference Result 282 states and 815 transitions. [2021-05-22 02:23:22,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:22,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:23:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:22,348 INFO L225 Difference]: With dead ends: 282 [2021-05-22 02:23:22,348 INFO L226 Difference]: Without dead ends: 263 [2021-05-22 02:23:22,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-05-22 02:23:22,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 158. [2021-05-22 02:23:22,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.261146496815287) internal successors, (512), 157 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 512 transitions. [2021-05-22 02:23:22,353 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 512 transitions. Word has length 15 [2021-05-22 02:23:22,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:22,353 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 512 transitions. [2021-05-22 02:23:22,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,353 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 512 transitions. [2021-05-22 02:23:22,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:22,354 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:22,354 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:22,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-22 02:23:22,354 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:22,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:22,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1827392437, now seen corresponding path program 4 times [2021-05-22 02:23:22,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:22,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235826500] [2021-05-22 02:23:22,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:22,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:22,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235826500] [2021-05-22 02:23:22,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235826500] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:22,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:22,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:22,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338086124] [2021-05-22 02:23:22,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:22,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:22,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:22,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:22,404 INFO L87 Difference]: Start difference. First operand 158 states and 512 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:22,464 INFO L93 Difference]: Finished difference Result 273 states and 790 transitions. [2021-05-22 02:23:22,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:22,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:23:22,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:22,466 INFO L225 Difference]: With dead ends: 273 [2021-05-22 02:23:22,466 INFO L226 Difference]: Without dead ends: 251 [2021-05-22 02:23:22,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:22,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-22 02:23:22,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 160. [2021-05-22 02:23:22,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.2641509433962264) internal successors, (519), 159 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 519 transitions. [2021-05-22 02:23:22,471 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 519 transitions. Word has length 15 [2021-05-22 02:23:22,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:22,471 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 519 transitions. [2021-05-22 02:23:22,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,472 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 519 transitions. [2021-05-22 02:23:22,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:22,476 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:22,476 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:22,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-22 02:23:22,478 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:22,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:22,479 INFO L82 PathProgramCache]: Analyzing trace with hash 384286855, now seen corresponding path program 4 times [2021-05-22 02:23:22,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:22,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093570125] [2021-05-22 02:23:22,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:22,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:22,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:22,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093570125] [2021-05-22 02:23:22,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093570125] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:22,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:22,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:22,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16476044] [2021-05-22 02:23:22,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:22,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:22,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:22,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:22,533 INFO L87 Difference]: Start difference. First operand 160 states and 519 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:22,583 INFO L93 Difference]: Finished difference Result 254 states and 753 transitions. [2021-05-22 02:23:22,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:22,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:23:22,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:22,586 INFO L225 Difference]: With dead ends: 254 [2021-05-22 02:23:22,586 INFO L226 Difference]: Without dead ends: 231 [2021-05-22 02:23:22,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:22,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-22 02:23:22,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2021-05-22 02:23:22,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.251572327044025) internal successors, (517), 159 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 517 transitions. [2021-05-22 02:23:22,604 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 517 transitions. Word has length 15 [2021-05-22 02:23:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:22,605 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 517 transitions. [2021-05-22 02:23:22,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 517 transitions. [2021-05-22 02:23:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:22,605 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:22,606 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:22,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-22 02:23:22,606 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:22,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:22,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1496312779, now seen corresponding path program 5 times [2021-05-22 02:23:22,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:22,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24634562] [2021-05-22 02:23:22,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:22,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:22,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24634562] [2021-05-22 02:23:22,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24634562] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:22,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:22,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:22,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477389915] [2021-05-22 02:23:22,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:22,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:22,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:22,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:22,629 INFO L87 Difference]: Start difference. First operand 160 states and 517 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:22,672 INFO L93 Difference]: Finished difference Result 286 states and 846 transitions. [2021-05-22 02:23:22,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:22,673 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:23:22,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:22,674 INFO L225 Difference]: With dead ends: 286 [2021-05-22 02:23:22,674 INFO L226 Difference]: Without dead ends: 264 [2021-05-22 02:23:22,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:22,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-22 02:23:22,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 160. [2021-05-22 02:23:22,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.251572327044025) internal successors, (517), 159 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 517 transitions. [2021-05-22 02:23:22,679 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 517 transitions. Word has length 15 [2021-05-22 02:23:22,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:22,679 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 517 transitions. [2021-05-22 02:23:22,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,679 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 517 transitions. [2021-05-22 02:23:22,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:22,679 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:22,680 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:22,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-22 02:23:22,680 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:22,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:22,680 INFO L82 PathProgramCache]: Analyzing trace with hash 2099945467, now seen corresponding path program 6 times [2021-05-22 02:23:22,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:22,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579643883] [2021-05-22 02:23:22,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:22,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:22,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579643883] [2021-05-22 02:23:22,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579643883] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:22,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:22,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:22,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872093174] [2021-05-22 02:23:22,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:22,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:22,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:22,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:22,703 INFO L87 Difference]: Start difference. First operand 160 states and 517 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:22,748 INFO L93 Difference]: Finished difference Result 277 states and 810 transitions. [2021-05-22 02:23:22,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:22,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:23:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:22,750 INFO L225 Difference]: With dead ends: 277 [2021-05-22 02:23:22,750 INFO L226 Difference]: Without dead ends: 255 [2021-05-22 02:23:22,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-22 02:23:22,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 158. [2021-05-22 02:23:22,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.2356687898089174) internal successors, (508), 157 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 508 transitions. [2021-05-22 02:23:22,754 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 508 transitions. Word has length 15 [2021-05-22 02:23:22,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:22,754 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 508 transitions. [2021-05-22 02:23:22,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,755 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 508 transitions. [2021-05-22 02:23:22,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:22,755 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:22,755 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:22,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-22 02:23:22,755 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:22,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:22,756 INFO L82 PathProgramCache]: Analyzing trace with hash 232212098, now seen corresponding path program 5 times [2021-05-22 02:23:22,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:22,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923588136] [2021-05-22 02:23:22,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:22,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:22,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923588136] [2021-05-22 02:23:22,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923588136] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:22,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:22,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:22,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664271809] [2021-05-22 02:23:22,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:22,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:22,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:22,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:22,788 INFO L87 Difference]: Start difference. First operand 158 states and 508 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:22,845 INFO L93 Difference]: Finished difference Result 312 states and 947 transitions. [2021-05-22 02:23:22,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:22,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:23:22,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:22,847 INFO L225 Difference]: With dead ends: 312 [2021-05-22 02:23:22,847 INFO L226 Difference]: Without dead ends: 285 [2021-05-22 02:23:22,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:22,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-05-22 02:23:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 160. [2021-05-22 02:23:22,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.238993710691824) internal successors, (515), 159 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 515 transitions. [2021-05-22 02:23:22,852 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 515 transitions. Word has length 15 [2021-05-22 02:23:22,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:22,852 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 515 transitions. [2021-05-22 02:23:22,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,852 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 515 transitions. [2021-05-22 02:23:22,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:22,853 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:22,853 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:22,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-22 02:23:22,853 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:22,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:22,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1046340473, now seen corresponding path program 5 times [2021-05-22 02:23:22,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:22,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793162530] [2021-05-22 02:23:22,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:22,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:22,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793162530] [2021-05-22 02:23:22,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793162530] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:22,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:22,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:22,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21789750] [2021-05-22 02:23:22,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:22,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:22,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:22,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:22,880 INFO L87 Difference]: Start difference. First operand 160 states and 515 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:22,937 INFO L93 Difference]: Finished difference Result 371 states and 1121 transitions. [2021-05-22 02:23:22,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:22,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:23:22,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:22,939 INFO L225 Difference]: With dead ends: 371 [2021-05-22 02:23:22,939 INFO L226 Difference]: Without dead ends: 352 [2021-05-22 02:23:22,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:22,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-05-22 02:23:22,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 160. [2021-05-22 02:23:22,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.238993710691824) internal successors, (515), 159 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 515 transitions. [2021-05-22 02:23:22,944 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 515 transitions. Word has length 15 [2021-05-22 02:23:22,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:22,944 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 515 transitions. [2021-05-22 02:23:22,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,944 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 515 transitions. [2021-05-22 02:23:22,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:22,945 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:22,945 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:22,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-22 02:23:22,945 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:22,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:22,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1131085214, now seen corresponding path program 6 times [2021-05-22 02:23:22,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:22,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96190915] [2021-05-22 02:23:22,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:22,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:22,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96190915] [2021-05-22 02:23:22,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96190915] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:22,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:22,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:22,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641239173] [2021-05-22 02:23:22,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:22,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:22,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:22,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:22,972 INFO L87 Difference]: Start difference. First operand 160 states and 515 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,031 INFO L93 Difference]: Finished difference Result 377 states and 1137 transitions. [2021-05-22 02:23:23,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:23,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:23:23,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,033 INFO L225 Difference]: With dead ends: 377 [2021-05-22 02:23:23,033 INFO L226 Difference]: Without dead ends: 356 [2021-05-22 02:23:23,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:23,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-05-22 02:23:23,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 160. [2021-05-22 02:23:23,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.238993710691824) internal successors, (515), 159 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 515 transitions. [2021-05-22 02:23:23,038 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 515 transitions. Word has length 15 [2021-05-22 02:23:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:23,038 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 515 transitions. [2021-05-22 02:23:23,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 515 transitions. [2021-05-22 02:23:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:23,039 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:23,039 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:23,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-22 02:23:23,039 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:23,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:23,039 INFO L82 PathProgramCache]: Analyzing trace with hash -964122021, now seen corresponding path program 6 times [2021-05-22 02:23:23,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:23,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90476824] [2021-05-22 02:23:23,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90476824] [2021-05-22 02:23:23,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90476824] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:23,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:23,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:23,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453901426] [2021-05-22 02:23:23,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:23,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:23,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:23,064 INFO L87 Difference]: Start difference. First operand 160 states and 515 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,106 INFO L93 Difference]: Finished difference Result 268 states and 825 transitions. [2021-05-22 02:23:23,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:23,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:23:23,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,108 INFO L225 Difference]: With dead ends: 268 [2021-05-22 02:23:23,108 INFO L226 Difference]: Without dead ends: 245 [2021-05-22 02:23:23,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:23,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-22 02:23:23,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 160. [2021-05-22 02:23:23,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.2264150943396226) internal successors, (513), 159 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 513 transitions. [2021-05-22 02:23:23,112 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 513 transitions. Word has length 15 [2021-05-22 02:23:23,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:23,112 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 513 transitions. [2021-05-22 02:23:23,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,112 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 513 transitions. [2021-05-22 02:23:23,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:23:23,112 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:23,112 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:23,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-22 02:23:23,112 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:23,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:23,113 INFO L82 PathProgramCache]: Analyzing trace with hash 360622849, now seen corresponding path program 1 times [2021-05-22 02:23:23,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:23,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395212786] [2021-05-22 02:23:23,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395212786] [2021-05-22 02:23:23,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395212786] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:23,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:23,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:23:23,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458559994] [2021-05-22 02:23:23,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:23:23,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:23:23,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:23,134 INFO L87 Difference]: Start difference. First operand 160 states and 513 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,151 INFO L93 Difference]: Finished difference Result 304 states and 846 transitions. [2021-05-22 02:23:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:23,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:23:23,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,153 INFO L225 Difference]: With dead ends: 304 [2021-05-22 02:23:23,153 INFO L226 Difference]: Without dead ends: 282 [2021-05-22 02:23:23,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:23,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-22 02:23:23,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 160. [2021-05-22 02:23:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.1823899371069184) internal successors, (506), 159 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 506 transitions. [2021-05-22 02:23:23,157 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 506 transitions. Word has length 16 [2021-05-22 02:23:23,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:23,157 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 506 transitions. [2021-05-22 02:23:23,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 506 transitions. [2021-05-22 02:23:23,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:23:23,159 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:23,159 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:23,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-22 02:23:23,159 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:23,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:23,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1058721603, now seen corresponding path program 2 times [2021-05-22 02:23:23,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:23,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085224299] [2021-05-22 02:23:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085224299] [2021-05-22 02:23:23,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085224299] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:23,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:23,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:23:23,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447660740] [2021-05-22 02:23:23,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:23:23,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:23:23,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:23,177 INFO L87 Difference]: Start difference. First operand 160 states and 506 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,195 INFO L93 Difference]: Finished difference Result 298 states and 826 transitions. [2021-05-22 02:23:23,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:23,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:23:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,197 INFO L225 Difference]: With dead ends: 298 [2021-05-22 02:23:23,197 INFO L226 Difference]: Without dead ends: 276 [2021-05-22 02:23:23,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:23,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-05-22 02:23:23,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 153. [2021-05-22 02:23:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 3.223684210526316) internal successors, (490), 152 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 490 transitions. [2021-05-22 02:23:23,201 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 490 transitions. Word has length 16 [2021-05-22 02:23:23,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:23,201 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 490 transitions. [2021-05-22 02:23:23,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,201 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 490 transitions. [2021-05-22 02:23:23,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:23:23,201 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:23,201 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:23,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-22 02:23:23,201 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:23,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:23,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1568921575, now seen corresponding path program 1 times [2021-05-22 02:23:23,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:23,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903531479] [2021-05-22 02:23:23,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903531479] [2021-05-22 02:23:23,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903531479] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:23,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:23,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:23:23,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283427024] [2021-05-22 02:23:23,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:23:23,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:23:23,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:23,216 INFO L87 Difference]: Start difference. First operand 153 states and 490 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,234 INFO L93 Difference]: Finished difference Result 267 states and 761 transitions. [2021-05-22 02:23:23,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:23,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:23:23,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,236 INFO L225 Difference]: With dead ends: 267 [2021-05-22 02:23:23,236 INFO L226 Difference]: Without dead ends: 267 [2021-05-22 02:23:23,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:23,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-05-22 02:23:23,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 145. [2021-05-22 02:23:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.2083333333333335) internal successors, (462), 144 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 462 transitions. [2021-05-22 02:23:23,239 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 462 transitions. Word has length 16 [2021-05-22 02:23:23,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:23,239 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 462 transitions. [2021-05-22 02:23:23,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,239 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 462 transitions. [2021-05-22 02:23:23,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:23:23,240 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:23,240 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:23,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-22 02:23:23,240 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:23,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:23,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1557107456, now seen corresponding path program 1 times [2021-05-22 02:23:23,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:23,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193955934] [2021-05-22 02:23:23,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193955934] [2021-05-22 02:23:23,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193955934] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:23,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:23,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:23:23,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813886130] [2021-05-22 02:23:23,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:23:23,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:23:23,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:23,250 INFO L87 Difference]: Start difference. First operand 145 states and 462 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,264 INFO L93 Difference]: Finished difference Result 261 states and 729 transitions. [2021-05-22 02:23:23,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:23,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:23:23,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,265 INFO L225 Difference]: With dead ends: 261 [2021-05-22 02:23:23,265 INFO L226 Difference]: Without dead ends: 236 [2021-05-22 02:23:23,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:23,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-22 02:23:23,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2021-05-22 02:23:23,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.147887323943662) internal successors, (447), 142 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 447 transitions. [2021-05-22 02:23:23,269 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 447 transitions. Word has length 16 [2021-05-22 02:23:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:23,269 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 447 transitions. [2021-05-22 02:23:23,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 447 transitions. [2021-05-22 02:23:23,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:23:23,269 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:23,269 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:23,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-22 02:23:23,269 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:23,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:23,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1813140347, now seen corresponding path program 3 times [2021-05-22 02:23:23,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:23,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911023373] [2021-05-22 02:23:23,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911023373] [2021-05-22 02:23:23,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911023373] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:23,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:23,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:23:23,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306600174] [2021-05-22 02:23:23,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:23:23,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:23:23,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:23,286 INFO L87 Difference]: Start difference. First operand 143 states and 447 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,298 INFO L93 Difference]: Finished difference Result 255 states and 710 transitions. [2021-05-22 02:23:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:23:23,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:23:23,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,299 INFO L225 Difference]: With dead ends: 255 [2021-05-22 02:23:23,299 INFO L226 Difference]: Without dead ends: 233 [2021-05-22 02:23:23,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-22 02:23:23,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 143. [2021-05-22 02:23:23,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.084507042253521) internal successors, (438), 142 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 438 transitions. [2021-05-22 02:23:23,304 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 438 transitions. Word has length 16 [2021-05-22 02:23:23,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:23,304 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 438 transitions. [2021-05-22 02:23:23,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,305 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 438 transitions. [2021-05-22 02:23:23,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:23:23,305 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:23,305 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:23,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-22 02:23:23,305 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:23,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:23,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1420564495, now seen corresponding path program 2 times [2021-05-22 02:23:23,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:23,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249788800] [2021-05-22 02:23:23,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249788800] [2021-05-22 02:23:23,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249788800] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:23,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:23,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:23:23,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131736824] [2021-05-22 02:23:23,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:23:23,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:23:23,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:23,321 INFO L87 Difference]: Start difference. First operand 143 states and 438 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,334 INFO L93 Difference]: Finished difference Result 206 states and 573 transitions. [2021-05-22 02:23:23,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:23,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:23:23,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,335 INFO L225 Difference]: With dead ends: 206 [2021-05-22 02:23:23,335 INFO L226 Difference]: Without dead ends: 206 [2021-05-22 02:23:23,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:23,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-22 02:23:23,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 112. [2021-05-22 02:23:23,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.918918918918919) internal successors, (324), 111 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 324 transitions. [2021-05-22 02:23:23,339 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 324 transitions. Word has length 16 [2021-05-22 02:23:23,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:23,339 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 324 transitions. [2021-05-22 02:23:23,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,339 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 324 transitions. [2021-05-22 02:23:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:23:23,340 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:23,340 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:23,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-22 02:23:23,340 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:23,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:23,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1372165464, now seen corresponding path program 2 times [2021-05-22 02:23:23,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:23,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080289711] [2021-05-22 02:23:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080289711] [2021-05-22 02:23:23,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080289711] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:23,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:23,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:23:23,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413088333] [2021-05-22 02:23:23,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:23:23,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:23:23,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:23,359 INFO L87 Difference]: Start difference. First operand 112 states and 324 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,367 INFO L93 Difference]: Finished difference Result 163 states and 436 transitions. [2021-05-22 02:23:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:23:23,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:23:23,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,368 INFO L225 Difference]: With dead ends: 163 [2021-05-22 02:23:23,368 INFO L226 Difference]: Without dead ends: 144 [2021-05-22 02:23:23,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:23,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-22 02:23:23,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 108. [2021-05-22 02:23:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.9345794392523366) internal successors, (314), 107 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 314 transitions. [2021-05-22 02:23:23,370 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 314 transitions. Word has length 16 [2021-05-22 02:23:23,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:23,371 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 314 transitions. [2021-05-22 02:23:23,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,371 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 314 transitions. [2021-05-22 02:23:23,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:23:23,371 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:23,371 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:23,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-22 02:23:23,371 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:23,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:23,372 INFO L82 PathProgramCache]: Analyzing trace with hash -97814091, now seen corresponding path program 4 times [2021-05-22 02:23:23,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:23,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870252316] [2021-05-22 02:23:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870252316] [2021-05-22 02:23:23,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870252316] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:23,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:23,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:23:23,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779910921] [2021-05-22 02:23:23,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:23:23,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:23:23,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:23,384 INFO L87 Difference]: Start difference. First operand 108 states and 314 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,394 INFO L93 Difference]: Finished difference Result 123 states and 338 transitions. [2021-05-22 02:23:23,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:23:23,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:23:23,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,395 INFO L225 Difference]: With dead ends: 123 [2021-05-22 02:23:23,395 INFO L226 Difference]: Without dead ends: 108 [2021-05-22 02:23:23,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:23,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-22 02:23:23,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-05-22 02:23:23,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 308 transitions. [2021-05-22 02:23:23,398 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 308 transitions. Word has length 16 [2021-05-22 02:23:23,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:23,399 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 308 transitions. [2021-05-22 02:23:23,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,399 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 308 transitions. [2021-05-22 02:23:23,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:23,399 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:23,399 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:23,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-22 02:23:23,399 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:23,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:23,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1361223606, now seen corresponding path program 1 times [2021-05-22 02:23:23,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:23,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176539166] [2021-05-22 02:23:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176539166] [2021-05-22 02:23:23,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176539166] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:23,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:23,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:23,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754925843] [2021-05-22 02:23:23,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:23,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:23,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:23,433 INFO L87 Difference]: Start difference. First operand 108 states and 308 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,500 INFO L93 Difference]: Finished difference Result 265 states and 721 transitions. [2021-05-22 02:23:23,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:23,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:23,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,502 INFO L225 Difference]: With dead ends: 265 [2021-05-22 02:23:23,502 INFO L226 Difference]: Without dead ends: 250 [2021-05-22 02:23:23,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:23,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-22 02:23:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 141. [2021-05-22 02:23:23,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.7928571428571427) internal successors, (391), 140 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 391 transitions. [2021-05-22 02:23:23,505 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 391 transitions. Word has length 17 [2021-05-22 02:23:23,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:23,505 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 391 transitions. [2021-05-22 02:23:23,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,505 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 391 transitions. [2021-05-22 02:23:23,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:23,505 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:23,505 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:23,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-22 02:23:23,506 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:23,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:23,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1726190618, now seen corresponding path program 2 times [2021-05-22 02:23:23,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:23,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96961017] [2021-05-22 02:23:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96961017] [2021-05-22 02:23:23,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96961017] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:23,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:23,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:23,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038395329] [2021-05-22 02:23:23,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:23,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:23,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:23,546 INFO L87 Difference]: Start difference. First operand 141 states and 391 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,627 INFO L93 Difference]: Finished difference Result 298 states and 795 transitions. [2021-05-22 02:23:23,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:23,628 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:23,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,629 INFO L225 Difference]: With dead ends: 298 [2021-05-22 02:23:23,629 INFO L226 Difference]: Without dead ends: 283 [2021-05-22 02:23:23,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:23,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-22 02:23:23,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 150. [2021-05-22 02:23:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.8053691275167787) internal successors, (418), 149 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 418 transitions. [2021-05-22 02:23:23,632 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 418 transitions. Word has length 17 [2021-05-22 02:23:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:23,632 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 418 transitions. [2021-05-22 02:23:23,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 418 transitions. [2021-05-22 02:23:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:23,633 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:23,633 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:23,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-22 02:23:23,633 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:23,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:23,633 INFO L82 PathProgramCache]: Analyzing trace with hash 870056290, now seen corresponding path program 3 times [2021-05-22 02:23:23,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:23,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505047837] [2021-05-22 02:23:23,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505047837] [2021-05-22 02:23:23,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505047837] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:23,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:23,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:23,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154406026] [2021-05-22 02:23:23,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:23,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:23,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:23,675 INFO L87 Difference]: Start difference. First operand 150 states and 418 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,768 INFO L93 Difference]: Finished difference Result 281 states and 763 transitions. [2021-05-22 02:23:23,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:23,768 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:23,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,769 INFO L225 Difference]: With dead ends: 281 [2021-05-22 02:23:23,769 INFO L226 Difference]: Without dead ends: 266 [2021-05-22 02:23:23,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:23,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-22 02:23:23,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 150. [2021-05-22 02:23:23,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.8053691275167787) internal successors, (418), 149 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 418 transitions. [2021-05-22 02:23:23,772 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 418 transitions. Word has length 17 [2021-05-22 02:23:23,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:23,773 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 418 transitions. [2021-05-22 02:23:23,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,773 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 418 transitions. [2021-05-22 02:23:23,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:23,773 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:23,773 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:23,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-22 02:23:23,773 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:23,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:23,774 INFO L82 PathProgramCache]: Analyzing trace with hash 2059322360, now seen corresponding path program 4 times [2021-05-22 02:23:23,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:23,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556437744] [2021-05-22 02:23:23,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556437744] [2021-05-22 02:23:23,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556437744] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:23,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:23,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:23,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605053182] [2021-05-22 02:23:23,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:23,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:23,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:23,806 INFO L87 Difference]: Start difference. First operand 150 states and 418 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,886 INFO L93 Difference]: Finished difference Result 289 states and 784 transitions. [2021-05-22 02:23:23,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:23,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:23,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,888 INFO L225 Difference]: With dead ends: 289 [2021-05-22 02:23:23,888 INFO L226 Difference]: Without dead ends: 274 [2021-05-22 02:23:23,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:23,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-22 02:23:23,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 159. [2021-05-22 02:23:23,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.7974683544303796) internal successors, (442), 158 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 442 transitions. [2021-05-22 02:23:23,891 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 442 transitions. Word has length 17 [2021-05-22 02:23:23,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:23,891 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 442 transitions. [2021-05-22 02:23:23,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,891 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 442 transitions. [2021-05-22 02:23:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:23,892 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:23,892 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:23,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-22 02:23:23,892 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:23,892 INFO L82 PathProgramCache]: Analyzing trace with hash 2033546876, now seen corresponding path program 5 times [2021-05-22 02:23:23,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:23,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189094158] [2021-05-22 02:23:23,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189094158] [2021-05-22 02:23:23,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189094158] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:23,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:23,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:23,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226129693] [2021-05-22 02:23:23,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:23,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:23,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:23,927 INFO L87 Difference]: Start difference. First operand 159 states and 442 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:24,022 INFO L93 Difference]: Finished difference Result 322 states and 859 transitions. [2021-05-22 02:23:24,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:24,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:24,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:24,023 INFO L225 Difference]: With dead ends: 322 [2021-05-22 02:23:24,023 INFO L226 Difference]: Without dead ends: 307 [2021-05-22 02:23:24,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:24,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-05-22 02:23:24,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 162. [2021-05-22 02:23:24,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.8322981366459627) internal successors, (456), 161 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 456 transitions. [2021-05-22 02:23:24,027 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 456 transitions. Word has length 17 [2021-05-22 02:23:24,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:24,027 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 456 transitions. [2021-05-22 02:23:24,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,027 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 456 transitions. [2021-05-22 02:23:24,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:24,028 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:24,028 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:24,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-22 02:23:24,028 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:24,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:24,028 INFO L82 PathProgramCache]: Analyzing trace with hash 334826488, now seen corresponding path program 6 times [2021-05-22 02:23:24,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:24,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385749887] [2021-05-22 02:23:24,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:24,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:24,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385749887] [2021-05-22 02:23:24,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385749887] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:24,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:24,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:24,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422016204] [2021-05-22 02:23:24,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:24,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:24,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:24,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:24,063 INFO L87 Difference]: Start difference. First operand 162 states and 456 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:24,140 INFO L93 Difference]: Finished difference Result 299 states and 814 transitions. [2021-05-22 02:23:24,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:24,141 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:24,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:24,142 INFO L225 Difference]: With dead ends: 299 [2021-05-22 02:23:24,142 INFO L226 Difference]: Without dead ends: 284 [2021-05-22 02:23:24,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:24,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-22 02:23:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 159. [2021-05-22 02:23:24,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.7974683544303796) internal successors, (442), 158 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 442 transitions. [2021-05-22 02:23:24,146 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 442 transitions. Word has length 17 [2021-05-22 02:23:24,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:24,146 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 442 transitions. [2021-05-22 02:23:24,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,146 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 442 transitions. [2021-05-22 02:23:24,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:24,146 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:24,147 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:24,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-22 02:23:24,147 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:24,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:24,147 INFO L82 PathProgramCache]: Analyzing trace with hash -2035892590, now seen corresponding path program 7 times [2021-05-22 02:23:24,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:24,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102901639] [2021-05-22 02:23:24,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:24,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:24,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102901639] [2021-05-22 02:23:24,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102901639] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:24,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:24,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:24,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849407684] [2021-05-22 02:23:24,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:24,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:24,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:24,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:24,180 INFO L87 Difference]: Start difference. First operand 159 states and 442 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:24,246 INFO L93 Difference]: Finished difference Result 389 states and 1040 transitions. [2021-05-22 02:23:24,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:24,246 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:24,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:24,248 INFO L225 Difference]: With dead ends: 389 [2021-05-22 02:23:24,248 INFO L226 Difference]: Without dead ends: 374 [2021-05-22 02:23:24,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:24,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-05-22 02:23:24,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 166. [2021-05-22 02:23:24,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.8484848484848486) internal successors, (470), 165 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 470 transitions. [2021-05-22 02:23:24,252 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 470 transitions. Word has length 17 [2021-05-22 02:23:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:24,252 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 470 transitions. [2021-05-22 02:23:24,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,252 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 470 transitions. [2021-05-22 02:23:24,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:24,252 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:24,253 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:24,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-22 02:23:24,253 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:24,253 INFO L82 PathProgramCache]: Analyzing trace with hash -828339518, now seen corresponding path program 8 times [2021-05-22 02:23:24,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:24,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134022828] [2021-05-22 02:23:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:24,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:24,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134022828] [2021-05-22 02:23:24,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134022828] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:24,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:24,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:24,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823295057] [2021-05-22 02:23:24,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:24,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:24,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:24,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:24,287 INFO L87 Difference]: Start difference. First operand 166 states and 470 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:24,359 INFO L93 Difference]: Finished difference Result 398 states and 1066 transitions. [2021-05-22 02:23:24,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:24,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:24,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:24,361 INFO L225 Difference]: With dead ends: 398 [2021-05-22 02:23:24,361 INFO L226 Difference]: Without dead ends: 383 [2021-05-22 02:23:24,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:24,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-22 02:23:24,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 169. [2021-05-22 02:23:24,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.880952380952381) internal successors, (484), 168 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 484 transitions. [2021-05-22 02:23:24,365 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 484 transitions. Word has length 17 [2021-05-22 02:23:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:24,365 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 484 transitions. [2021-05-22 02:23:24,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 484 transitions. [2021-05-22 02:23:24,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:24,366 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:24,366 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:24,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-22 02:23:24,366 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:24,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:24,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1767907390, now seen corresponding path program 9 times [2021-05-22 02:23:24,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:24,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122253148] [2021-05-22 02:23:24,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:24,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:24,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122253148] [2021-05-22 02:23:24,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122253148] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:24,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:24,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:24,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008222343] [2021-05-22 02:23:24,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:24,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:24,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:24,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:24,403 INFO L87 Difference]: Start difference. First operand 169 states and 484 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:24,478 INFO L93 Difference]: Finished difference Result 405 states and 1082 transitions. [2021-05-22 02:23:24,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:24,478 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:24,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:24,480 INFO L225 Difference]: With dead ends: 405 [2021-05-22 02:23:24,480 INFO L226 Difference]: Without dead ends: 390 [2021-05-22 02:23:24,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:24,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-05-22 02:23:24,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 161. [2021-05-22 02:23:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.825) internal successors, (452), 160 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 452 transitions. [2021-05-22 02:23:24,484 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 452 transitions. Word has length 17 [2021-05-22 02:23:24,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:24,484 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 452 transitions. [2021-05-22 02:23:24,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,484 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 452 transitions. [2021-05-22 02:23:24,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:24,484 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:24,484 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:24,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-22 02:23:24,484 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:24,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:24,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1043349262, now seen corresponding path program 10 times [2021-05-22 02:23:24,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:24,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481395691] [2021-05-22 02:23:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:24,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:24,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481395691] [2021-05-22 02:23:24,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481395691] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:24,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:24,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:24,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355066332] [2021-05-22 02:23:24,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:24,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:24,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:24,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:24,516 INFO L87 Difference]: Start difference. First operand 161 states and 452 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:24,579 INFO L93 Difference]: Finished difference Result 340 states and 918 transitions. [2021-05-22 02:23:24,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:24,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:24,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:24,580 INFO L225 Difference]: With dead ends: 340 [2021-05-22 02:23:24,580 INFO L226 Difference]: Without dead ends: 325 [2021-05-22 02:23:24,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:24,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-22 02:23:24,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 165. [2021-05-22 02:23:24,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.841463414634146) internal successors, (466), 164 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 466 transitions. [2021-05-22 02:23:24,584 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 466 transitions. Word has length 17 [2021-05-22 02:23:24,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:24,584 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 466 transitions. [2021-05-22 02:23:24,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,584 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 466 transitions. [2021-05-22 02:23:24,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:24,585 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:24,585 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:24,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-22 02:23:24,585 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:24,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:24,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1480345592, now seen corresponding path program 11 times [2021-05-22 02:23:24,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:24,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483965010] [2021-05-22 02:23:24,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:24,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:24,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483965010] [2021-05-22 02:23:24,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483965010] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:24,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:24,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:24,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215993079] [2021-05-22 02:23:24,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:24,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:24,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:24,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:24,619 INFO L87 Difference]: Start difference. First operand 165 states and 466 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:24,705 INFO L93 Difference]: Finished difference Result 335 states and 909 transitions. [2021-05-22 02:23:24,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:24,706 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:24,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:24,707 INFO L225 Difference]: With dead ends: 335 [2021-05-22 02:23:24,707 INFO L226 Difference]: Without dead ends: 320 [2021-05-22 02:23:24,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:24,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-22 02:23:24,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 171. [2021-05-22 02:23:24,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.8411764705882354) internal successors, (483), 170 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 483 transitions. [2021-05-22 02:23:24,712 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 483 transitions. Word has length 17 [2021-05-22 02:23:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:24,713 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 483 transitions. [2021-05-22 02:23:24,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,714 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 483 transitions. [2021-05-22 02:23:24,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:24,714 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:24,714 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:24,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-22 02:23:24,714 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:24,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:24,714 INFO L82 PathProgramCache]: Analyzing trace with hash -145439044, now seen corresponding path program 12 times [2021-05-22 02:23:24,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:24,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619228924] [2021-05-22 02:23:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:24,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:24,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619228924] [2021-05-22 02:23:24,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619228924] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:24,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:24,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:24,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811925001] [2021-05-22 02:23:24,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:24,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:24,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:24,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:24,749 INFO L87 Difference]: Start difference. First operand 171 states and 483 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:24,833 INFO L93 Difference]: Finished difference Result 318 states and 879 transitions. [2021-05-22 02:23:24,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:24,833 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:24,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:24,834 INFO L225 Difference]: With dead ends: 318 [2021-05-22 02:23:24,834 INFO L226 Difference]: Without dead ends: 303 [2021-05-22 02:23:24,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:24,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-05-22 02:23:24,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 171. [2021-05-22 02:23:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.8411764705882354) internal successors, (483), 170 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 483 transitions. [2021-05-22 02:23:24,837 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 483 transitions. Word has length 17 [2021-05-22 02:23:24,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:24,837 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 483 transitions. [2021-05-22 02:23:24,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,838 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 483 transitions. [2021-05-22 02:23:24,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:24,838 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:24,838 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:24,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-22 02:23:24,838 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:24,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:24,838 INFO L82 PathProgramCache]: Analyzing trace with hash 161256120, now seen corresponding path program 13 times [2021-05-22 02:23:24,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:24,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245839393] [2021-05-22 02:23:24,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:24,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:24,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245839393] [2021-05-22 02:23:24,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245839393] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:24,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:24,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:24,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753838902] [2021-05-22 02:23:24,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:24,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:24,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:24,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:24,877 INFO L87 Difference]: Start difference. First operand 171 states and 483 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:24,949 INFO L93 Difference]: Finished difference Result 385 states and 1046 transitions. [2021-05-22 02:23:24,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:24,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:24,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:24,951 INFO L225 Difference]: With dead ends: 385 [2021-05-22 02:23:24,951 INFO L226 Difference]: Without dead ends: 370 [2021-05-22 02:23:24,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:24,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-05-22 02:23:24,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 174. [2021-05-22 02:23:24,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-05-22 02:23:24,954 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-05-22 02:23:24,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:24,955 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-05-22 02:23:24,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-05-22 02:23:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:24,955 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:24,955 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:24,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-22 02:23:24,955 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:24,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:24,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1057379240, now seen corresponding path program 14 times [2021-05-22 02:23:24,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:24,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409123908] [2021-05-22 02:23:24,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:24,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:24,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409123908] [2021-05-22 02:23:24,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409123908] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:24,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:24,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:24,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329877870] [2021-05-22 02:23:24,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:24,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:24,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:24,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:24,993 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:25,065 INFO L93 Difference]: Finished difference Result 383 states and 1039 transitions. [2021-05-22 02:23:25,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:25,066 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:25,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:25,067 INFO L225 Difference]: With dead ends: 383 [2021-05-22 02:23:25,067 INFO L226 Difference]: Without dead ends: 368 [2021-05-22 02:23:25,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:25,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-05-22 02:23:25,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 174. [2021-05-22 02:23:25,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-05-22 02:23:25,071 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-05-22 02:23:25,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:25,071 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-05-22 02:23:25,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,071 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-05-22 02:23:25,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:25,071 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:25,071 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:25,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-22 02:23:25,072 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:25,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:25,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1150316668, now seen corresponding path program 15 times [2021-05-22 02:23:25,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:25,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386163436] [2021-05-22 02:23:25,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:25,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:25,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:25,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386163436] [2021-05-22 02:23:25,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386163436] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:25,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:25,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:25,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34369879] [2021-05-22 02:23:25,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:25,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:25,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:25,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:25,105 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:25,186 INFO L93 Difference]: Finished difference Result 392 states and 1055 transitions. [2021-05-22 02:23:25,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:25,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:25,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:25,188 INFO L225 Difference]: With dead ends: 392 [2021-05-22 02:23:25,188 INFO L226 Difference]: Without dead ends: 377 [2021-05-22 02:23:25,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:25,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-05-22 02:23:25,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 177. [2021-05-22 02:23:25,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.909090909090909) internal successors, (512), 176 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 512 transitions. [2021-05-22 02:23:25,192 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 512 transitions. Word has length 17 [2021-05-22 02:23:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:25,192 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 512 transitions. [2021-05-22 02:23:25,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 512 transitions. [2021-05-22 02:23:25,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:25,192 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:25,192 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:25,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-22 02:23:25,193 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:25,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:25,193 INFO L82 PathProgramCache]: Analyzing trace with hash -19872328, now seen corresponding path program 16 times [2021-05-22 02:23:25,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:25,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450558083] [2021-05-22 02:23:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:25,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:25,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450558083] [2021-05-22 02:23:25,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450558083] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:25,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:25,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:25,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352504672] [2021-05-22 02:23:25,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:25,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:25,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:25,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:25,225 INFO L87 Difference]: Start difference. First operand 177 states and 512 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:25,305 INFO L93 Difference]: Finished difference Result 376 states and 1032 transitions. [2021-05-22 02:23:25,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:25,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:25,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:25,307 INFO L225 Difference]: With dead ends: 376 [2021-05-22 02:23:25,307 INFO L226 Difference]: Without dead ends: 361 [2021-05-22 02:23:25,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:25,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-05-22 02:23:25,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 174. [2021-05-22 02:23:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-05-22 02:23:25,311 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-05-22 02:23:25,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:25,311 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-05-22 02:23:25,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-05-22 02:23:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:25,311 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:25,311 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:25,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-22 02:23:25,312 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:25,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:25,312 INFO L82 PathProgramCache]: Analyzing trace with hash -36809380, now seen corresponding path program 17 times [2021-05-22 02:23:25,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:25,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721210725] [2021-05-22 02:23:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:25,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:25,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721210725] [2021-05-22 02:23:25,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721210725] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:25,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:25,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:25,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610877442] [2021-05-22 02:23:25,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:25,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:25,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:25,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:25,344 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:25,409 INFO L93 Difference]: Finished difference Result 364 states and 991 transitions. [2021-05-22 02:23:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:25,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:25,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:25,411 INFO L225 Difference]: With dead ends: 364 [2021-05-22 02:23:25,411 INFO L226 Difference]: Without dead ends: 349 [2021-05-22 02:23:25,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:25,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-05-22 02:23:25,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 176. [2021-05-22 02:23:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.8971428571428572) internal successors, (507), 175 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 507 transitions. [2021-05-22 02:23:25,414 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 507 transitions. Word has length 17 [2021-05-22 02:23:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:25,414 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 507 transitions. [2021-05-22 02:23:25,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,415 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 507 transitions. [2021-05-22 02:23:25,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:25,415 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:25,415 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:25,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-22 02:23:25,415 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:25,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:25,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1103474456, now seen corresponding path program 18 times [2021-05-22 02:23:25,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:25,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438571233] [2021-05-22 02:23:25,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:25,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:25,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438571233] [2021-05-22 02:23:25,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438571233] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:25,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:25,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:25,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295635504] [2021-05-22 02:23:25,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:25,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:25,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:25,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:25,447 INFO L87 Difference]: Start difference. First operand 176 states and 507 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:25,514 INFO L93 Difference]: Finished difference Result 343 states and 953 transitions. [2021-05-22 02:23:25,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:25,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:25,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:25,516 INFO L225 Difference]: With dead ends: 343 [2021-05-22 02:23:25,516 INFO L226 Difference]: Without dead ends: 328 [2021-05-22 02:23:25,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:25,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-22 02:23:25,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 174. [2021-05-22 02:23:25,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-05-22 02:23:25,519 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-05-22 02:23:25,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:25,519 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-05-22 02:23:25,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-05-22 02:23:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:25,520 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:25,520 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:25,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-22 02:23:25,520 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:25,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:25,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1622951230, now seen corresponding path program 19 times [2021-05-22 02:23:25,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:25,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900227915] [2021-05-22 02:23:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:25,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:25,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900227915] [2021-05-22 02:23:25,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900227915] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:25,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:25,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:25,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116154277] [2021-05-22 02:23:25,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:25,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:25,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:25,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:25,550 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:25,615 INFO L93 Difference]: Finished difference Result 360 states and 983 transitions. [2021-05-22 02:23:25,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:25,615 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:25,616 INFO L225 Difference]: With dead ends: 360 [2021-05-22 02:23:25,616 INFO L226 Difference]: Without dead ends: 345 [2021-05-22 02:23:25,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-22 02:23:25,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 177. [2021-05-22 02:23:25,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-05-22 02:23:25,620 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-05-22 02:23:25,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:25,620 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-05-22 02:23:25,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,620 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-05-22 02:23:25,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:25,620 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:25,620 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:25,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-22 02:23:25,620 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:25,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:25,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1422092646, now seen corresponding path program 20 times [2021-05-22 02:23:25,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:25,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90211780] [2021-05-22 02:23:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:25,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:25,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90211780] [2021-05-22 02:23:25,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90211780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:25,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:25,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:25,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384669080] [2021-05-22 02:23:25,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:25,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:25,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:25,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:25,654 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:25,737 INFO L93 Difference]: Finished difference Result 377 states and 1017 transitions. [2021-05-22 02:23:25,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:25,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:25,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:25,738 INFO L225 Difference]: With dead ends: 377 [2021-05-22 02:23:25,738 INFO L226 Difference]: Without dead ends: 362 [2021-05-22 02:23:25,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:25,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-05-22 02:23:25,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 179. [2021-05-22 02:23:25,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.9157303370786516) internal successors, (519), 178 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 519 transitions. [2021-05-22 02:23:25,742 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 519 transitions. Word has length 17 [2021-05-22 02:23:25,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:25,742 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 519 transitions. [2021-05-22 02:23:25,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 519 transitions. [2021-05-22 02:23:25,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:25,743 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:25,743 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:25,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-22 02:23:25,743 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:25,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:25,743 INFO L82 PathProgramCache]: Analyzing trace with hash 203457286, now seen corresponding path program 21 times [2021-05-22 02:23:25,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:25,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122328817] [2021-05-22 02:23:25,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:25,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:25,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122328817] [2021-05-22 02:23:25,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122328817] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:25,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:25,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:25,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799294938] [2021-05-22 02:23:25,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:25,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:25,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:25,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:25,773 INFO L87 Difference]: Start difference. First operand 179 states and 519 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:25,855 INFO L93 Difference]: Finished difference Result 354 states and 972 transitions. [2021-05-22 02:23:25,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:25,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:25,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:25,856 INFO L225 Difference]: With dead ends: 354 [2021-05-22 02:23:25,856 INFO L226 Difference]: Without dead ends: 339 [2021-05-22 02:23:25,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:25,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-22 02:23:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 177. [2021-05-22 02:23:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-05-22 02:23:25,860 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-05-22 02:23:25,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:25,860 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-05-22 02:23:25,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,860 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-05-22 02:23:25,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:25,860 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:25,860 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:25,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-22 02:23:25,860 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:25,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1026845314, now seen corresponding path program 22 times [2021-05-22 02:23:25,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:25,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036147747] [2021-05-22 02:23:25,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:25,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:25,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036147747] [2021-05-22 02:23:25,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036147747] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:25,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:25,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:25,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220847403] [2021-05-22 02:23:25,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:25,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:25,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:25,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:25,890 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:25,963 INFO L93 Difference]: Finished difference Result 409 states and 1106 transitions. [2021-05-22 02:23:25,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:25,964 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:25,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:25,965 INFO L225 Difference]: With dead ends: 409 [2021-05-22 02:23:25,965 INFO L226 Difference]: Without dead ends: 394 [2021-05-22 02:23:25,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:25,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-22 02:23:25,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 180. [2021-05-22 02:23:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.910614525139665) internal successors, (521), 179 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 521 transitions. [2021-05-22 02:23:25,969 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 521 transitions. Word has length 17 [2021-05-22 02:23:25,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:25,969 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 521 transitions. [2021-05-22 02:23:25,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,969 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 521 transitions. [2021-05-22 02:23:25,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:25,969 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:25,969 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:25,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-22 02:23:25,970 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:25,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:25,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1848016830, now seen corresponding path program 23 times [2021-05-22 02:23:25,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:25,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705041781] [2021-05-22 02:23:25,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:26,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:26,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705041781] [2021-05-22 02:23:26,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705041781] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:26,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:26,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:26,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965880389] [2021-05-22 02:23:26,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:26,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:26,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:26,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:26,003 INFO L87 Difference]: Start difference. First operand 180 states and 521 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:26,082 INFO L93 Difference]: Finished difference Result 407 states and 1110 transitions. [2021-05-22 02:23:26,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:26,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:26,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:26,084 INFO L225 Difference]: With dead ends: 407 [2021-05-22 02:23:26,084 INFO L226 Difference]: Without dead ends: 392 [2021-05-22 02:23:26,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:26,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-05-22 02:23:26,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 183. [2021-05-22 02:23:26,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9395604395604398) internal successors, (535), 182 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 535 transitions. [2021-05-22 02:23:26,088 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 535 transitions. Word has length 17 [2021-05-22 02:23:26,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:26,088 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 535 transitions. [2021-05-22 02:23:26,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,088 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 535 transitions. [2021-05-22 02:23:26,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:26,088 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:26,088 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:26,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-22 02:23:26,089 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:26,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:26,089 INFO L82 PathProgramCache]: Analyzing trace with hash 748230078, now seen corresponding path program 24 times [2021-05-22 02:23:26,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:26,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488402993] [2021-05-22 02:23:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:26,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:26,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488402993] [2021-05-22 02:23:26,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488402993] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:26,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:26,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:26,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361319493] [2021-05-22 02:23:26,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:26,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:26,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:26,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:26,119 INFO L87 Difference]: Start difference. First operand 183 states and 535 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:26,208 INFO L93 Difference]: Finished difference Result 384 states and 1065 transitions. [2021-05-22 02:23:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:26,209 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:26,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:26,213 INFO L225 Difference]: With dead ends: 384 [2021-05-22 02:23:26,213 INFO L226 Difference]: Without dead ends: 369 [2021-05-22 02:23:26,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:26,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-22 02:23:26,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 177. [2021-05-22 02:23:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-05-22 02:23:26,216 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-05-22 02:23:26,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:26,217 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-05-22 02:23:26,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,217 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-05-22 02:23:26,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:26,217 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:26,217 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:26,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-22 02:23:26,217 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:26,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:26,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1951172510, now seen corresponding path program 25 times [2021-05-22 02:23:26,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:26,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431517405] [2021-05-22 02:23:26,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:26,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:26,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431517405] [2021-05-22 02:23:26,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431517405] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:26,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:26,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:26,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770943506] [2021-05-22 02:23:26,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:26,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:26,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:26,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:26,253 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:26,343 INFO L93 Difference]: Finished difference Result 403 states and 1103 transitions. [2021-05-22 02:23:26,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:26,343 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:26,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:26,344 INFO L225 Difference]: With dead ends: 403 [2021-05-22 02:23:26,344 INFO L226 Difference]: Without dead ends: 388 [2021-05-22 02:23:26,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-05-22 02:23:26,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 180. [2021-05-22 02:23:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9329608938547485) internal successors, (525), 179 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 525 transitions. [2021-05-22 02:23:26,349 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 525 transitions. Word has length 17 [2021-05-22 02:23:26,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:26,349 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 525 transitions. [2021-05-22 02:23:26,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,349 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 525 transitions. [2021-05-22 02:23:26,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:26,350 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:26,350 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:26,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-22 02:23:26,350 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:26,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:26,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1125159426, now seen corresponding path program 26 times [2021-05-22 02:23:26,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:26,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842034674] [2021-05-22 02:23:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:26,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:26,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842034674] [2021-05-22 02:23:26,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842034674] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:26,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:26,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:26,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102190317] [2021-05-22 02:23:26,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:26,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:26,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:26,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:26,389 INFO L87 Difference]: Start difference. First operand 180 states and 525 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:26,487 INFO L93 Difference]: Finished difference Result 401 states and 1096 transitions. [2021-05-22 02:23:26,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:26,487 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:26,488 INFO L225 Difference]: With dead ends: 401 [2021-05-22 02:23:26,488 INFO L226 Difference]: Without dead ends: 386 [2021-05-22 02:23:26,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-05-22 02:23:26,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 178. [2021-05-22 02:23:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-05-22 02:23:26,493 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 17 [2021-05-22 02:23:26,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:26,493 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-05-22 02:23:26,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,494 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-05-22 02:23:26,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:26,494 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:26,494 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:26,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-22 02:23:26,494 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:26,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:26,494 INFO L82 PathProgramCache]: Analyzing trace with hash -962111962, now seen corresponding path program 27 times [2021-05-22 02:23:26,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:26,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717877754] [2021-05-22 02:23:26,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:26,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:26,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717877754] [2021-05-22 02:23:26,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717877754] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:26,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:26,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:26,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576788661] [2021-05-22 02:23:26,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:26,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:26,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:26,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:26,528 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:26,612 INFO L93 Difference]: Finished difference Result 395 states and 1075 transitions. [2021-05-22 02:23:26,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:26,613 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:26,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:26,613 INFO L225 Difference]: With dead ends: 395 [2021-05-22 02:23:26,613 INFO L226 Difference]: Without dead ends: 380 [2021-05-22 02:23:26,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:26,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-22 02:23:26,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 181. [2021-05-22 02:23:26,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.9444444444444446) internal successors, (530), 180 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 530 transitions. [2021-05-22 02:23:26,617 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 530 transitions. Word has length 17 [2021-05-22 02:23:26,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:26,618 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 530 transitions. [2021-05-22 02:23:26,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,618 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 530 transitions. [2021-05-22 02:23:26,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:26,618 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:26,618 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:26,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-22 02:23:26,618 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:26,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:26,618 INFO L82 PathProgramCache]: Analyzing trace with hash -2132300958, now seen corresponding path program 28 times [2021-05-22 02:23:26,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:26,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983279232] [2021-05-22 02:23:26,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:26,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:26,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983279232] [2021-05-22 02:23:26,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983279232] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:26,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:26,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:26,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705424934] [2021-05-22 02:23:26,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:26,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:26,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:26,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:26,651 INFO L87 Difference]: Start difference. First operand 181 states and 530 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:26,734 INFO L93 Difference]: Finished difference Result 379 states and 1052 transitions. [2021-05-22 02:23:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:26,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:26,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:26,736 INFO L225 Difference]: With dead ends: 379 [2021-05-22 02:23:26,736 INFO L226 Difference]: Without dead ends: 364 [2021-05-22 02:23:26,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:26,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-05-22 02:23:26,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 178. [2021-05-22 02:23:26,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-05-22 02:23:26,739 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 17 [2021-05-22 02:23:26,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:26,739 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-05-22 02:23:26,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,739 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-05-22 02:23:26,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:26,739 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:26,739 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:26,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-22 02:23:26,740 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:26,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:26,740 INFO L82 PathProgramCache]: Analyzing trace with hash 2145729286, now seen corresponding path program 29 times [2021-05-22 02:23:26,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:26,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092609256] [2021-05-22 02:23:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:26,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:26,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092609256] [2021-05-22 02:23:26,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092609256] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:26,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:26,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:26,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876881228] [2021-05-22 02:23:26,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:26,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:26,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:26,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:26,775 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:26,842 INFO L93 Difference]: Finished difference Result 363 states and 1003 transitions. [2021-05-22 02:23:26,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:26,842 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:26,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:26,843 INFO L225 Difference]: With dead ends: 363 [2021-05-22 02:23:26,843 INFO L226 Difference]: Without dead ends: 348 [2021-05-22 02:23:26,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:26,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-22 02:23:26,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 180. [2021-05-22 02:23:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9329608938547485) internal successors, (525), 179 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 525 transitions. [2021-05-22 02:23:26,853 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 525 transitions. Word has length 17 [2021-05-22 02:23:26,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:26,853 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 525 transitions. [2021-05-22 02:23:26,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,853 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 525 transitions. [2021-05-22 02:23:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:26,853 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:26,853 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:26,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-22 02:23:26,853 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:26,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:26,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1008954174, now seen corresponding path program 30 times [2021-05-22 02:23:26,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:26,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255806346] [2021-05-22 02:23:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:26,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:26,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255806346] [2021-05-22 02:23:26,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255806346] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:26,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:26,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:26,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785546817] [2021-05-22 02:23:26,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:26,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:26,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:26,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:26,888 INFO L87 Difference]: Start difference. First operand 180 states and 525 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:26,961 INFO L93 Difference]: Finished difference Result 342 states and 965 transitions. [2021-05-22 02:23:26,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:26,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:26,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:26,962 INFO L225 Difference]: With dead ends: 342 [2021-05-22 02:23:26,962 INFO L226 Difference]: Without dead ends: 327 [2021-05-22 02:23:26,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:26,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-05-22 02:23:26,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 177. [2021-05-22 02:23:26,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-05-22 02:23:26,967 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-05-22 02:23:26,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:26,967 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-05-22 02:23:26,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,967 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-05-22 02:23:26,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:26,968 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:26,968 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:26,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-22 02:23:26,968 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:26,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:26,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1057121422, now seen corresponding path program 31 times [2021-05-22 02:23:26,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:26,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840107422] [2021-05-22 02:23:26,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:27,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:27,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840107422] [2021-05-22 02:23:27,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840107422] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:27,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:27,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:27,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509136280] [2021-05-22 02:23:27,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:27,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:27,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:27,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:27,003 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:27,070 INFO L93 Difference]: Finished difference Result 377 states and 1036 transitions. [2021-05-22 02:23:27,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:27,070 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:27,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:27,071 INFO L225 Difference]: With dead ends: 377 [2021-05-22 02:23:27,071 INFO L226 Difference]: Without dead ends: 362 [2021-05-22 02:23:27,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:27,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-05-22 02:23:27,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 186. [2021-05-22 02:23:27,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.9513513513513514) internal successors, (546), 185 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 546 transitions. [2021-05-22 02:23:27,074 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 546 transitions. Word has length 17 [2021-05-22 02:23:27,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:27,074 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 546 transitions. [2021-05-22 02:23:27,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,075 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 546 transitions. [2021-05-22 02:23:27,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:27,075 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:27,075 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:27,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-22 02:23:27,075 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:27,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:27,075 INFO L82 PathProgramCache]: Analyzing trace with hash -2030292802, now seen corresponding path program 32 times [2021-05-22 02:23:27,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:27,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304509422] [2021-05-22 02:23:27,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:27,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:27,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304509422] [2021-05-22 02:23:27,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304509422] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:27,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:27,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:27,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327612341] [2021-05-22 02:23:27,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:27,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:27,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:27,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:27,109 INFO L87 Difference]: Start difference. First operand 186 states and 546 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:27,180 INFO L93 Difference]: Finished difference Result 386 states and 1062 transitions. [2021-05-22 02:23:27,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:27,180 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:27,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:27,181 INFO L225 Difference]: With dead ends: 386 [2021-05-22 02:23:27,181 INFO L226 Difference]: Without dead ends: 371 [2021-05-22 02:23:27,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:27,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-05-22 02:23:27,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 189. [2021-05-22 02:23:27,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.978723404255319) internal successors, (560), 188 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 560 transitions. [2021-05-22 02:23:27,188 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 560 transitions. Word has length 17 [2021-05-22 02:23:27,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:27,188 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 560 transitions. [2021-05-22 02:23:27,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,188 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 560 transitions. [2021-05-22 02:23:27,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:27,189 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:27,189 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:27,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-22 02:23:27,189 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:27,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:27,189 INFO L82 PathProgramCache]: Analyzing trace with hash 565954106, now seen corresponding path program 33 times [2021-05-22 02:23:27,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:27,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155002618] [2021-05-22 02:23:27,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:27,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:27,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155002618] [2021-05-22 02:23:27,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155002618] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:27,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:27,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:27,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101833481] [2021-05-22 02:23:27,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:27,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:27,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:27,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:27,224 INFO L87 Difference]: Start difference. First operand 189 states and 560 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:27,297 INFO L93 Difference]: Finished difference Result 393 states and 1078 transitions. [2021-05-22 02:23:27,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:27,297 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:27,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:27,298 INFO L225 Difference]: With dead ends: 393 [2021-05-22 02:23:27,298 INFO L226 Difference]: Without dead ends: 378 [2021-05-22 02:23:27,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:27,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-05-22 02:23:27,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 181. [2021-05-22 02:23:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.933333333333333) internal successors, (528), 180 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 528 transitions. [2021-05-22 02:23:27,302 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 528 transitions. Word has length 17 [2021-05-22 02:23:27,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:27,302 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 528 transitions. [2021-05-22 02:23:27,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,302 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 528 transitions. [2021-05-22 02:23:27,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:27,302 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:27,302 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:27,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-22 02:23:27,302 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:27,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:27,303 INFO L82 PathProgramCache]: Analyzing trace with hash 2049664750, now seen corresponding path program 34 times [2021-05-22 02:23:27,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:27,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680498247] [2021-05-22 02:23:27,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:27,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:27,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680498247] [2021-05-22 02:23:27,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680498247] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:27,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:27,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:27,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792473538] [2021-05-22 02:23:27,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:27,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:27,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:27,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:27,346 INFO L87 Difference]: Start difference. First operand 181 states and 528 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:27,420 INFO L93 Difference]: Finished difference Result 438 states and 1184 transitions. [2021-05-22 02:23:27,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:27,420 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:27,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:27,421 INFO L225 Difference]: With dead ends: 438 [2021-05-22 02:23:27,421 INFO L226 Difference]: Without dead ends: 423 [2021-05-22 02:23:27,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:27,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-22 02:23:27,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 185. [2021-05-22 02:23:27,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9456521739130435) internal successors, (542), 184 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 542 transitions. [2021-05-22 02:23:27,425 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 542 transitions. Word has length 17 [2021-05-22 02:23:27,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:27,425 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 542 transitions. [2021-05-22 02:23:27,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,425 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 542 transitions. [2021-05-22 02:23:27,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:27,425 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:27,426 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:27,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-22 02:23:27,426 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:27,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:27,426 INFO L82 PathProgramCache]: Analyzing trace with hash 278392308, now seen corresponding path program 35 times [2021-05-22 02:23:27,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:27,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518444243] [2021-05-22 02:23:27,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:27,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:27,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518444243] [2021-05-22 02:23:27,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518444243] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:27,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:27,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:27,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793863811] [2021-05-22 02:23:27,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:27,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:27,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:27,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:27,463 INFO L87 Difference]: Start difference. First operand 185 states and 542 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:27,539 INFO L93 Difference]: Finished difference Result 433 states and 1175 transitions. [2021-05-22 02:23:27,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:27,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:27,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:27,540 INFO L225 Difference]: With dead ends: 433 [2021-05-22 02:23:27,540 INFO L226 Difference]: Without dead ends: 418 [2021-05-22 02:23:27,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:27,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-05-22 02:23:27,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 187. [2021-05-22 02:23:27,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9623655913978495) internal successors, (551), 186 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 551 transitions. [2021-05-22 02:23:27,544 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 551 transitions. Word has length 17 [2021-05-22 02:23:27,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:27,544 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 551 transitions. [2021-05-22 02:23:27,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,544 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 551 transitions. [2021-05-22 02:23:27,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:27,544 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:27,545 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:27,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-22 02:23:27,545 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:27,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:27,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1347392328, now seen corresponding path program 36 times [2021-05-22 02:23:27,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:27,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249797260] [2021-05-22 02:23:27,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:27,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:27,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249797260] [2021-05-22 02:23:27,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249797260] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:27,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:27,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:27,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001269257] [2021-05-22 02:23:27,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:27,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:27,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:27,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:27,587 INFO L87 Difference]: Start difference. First operand 187 states and 551 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:27,660 INFO L93 Difference]: Finished difference Result 416 states and 1145 transitions. [2021-05-22 02:23:27,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:27,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:27,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:27,661 INFO L225 Difference]: With dead ends: 416 [2021-05-22 02:23:27,661 INFO L226 Difference]: Without dead ends: 401 [2021-05-22 02:23:27,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:27,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-05-22 02:23:27,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 181. [2021-05-22 02:23:27,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.933333333333333) internal successors, (528), 180 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 528 transitions. [2021-05-22 02:23:27,665 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 528 transitions. Word has length 17 [2021-05-22 02:23:27,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:27,665 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 528 transitions. [2021-05-22 02:23:27,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,665 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 528 transitions. [2021-05-22 02:23:27,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:27,665 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:27,665 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:27,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-22 02:23:27,665 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:27,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:27,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1040697164, now seen corresponding path program 37 times [2021-05-22 02:23:27,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:27,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630375831] [2021-05-22 02:23:27,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:27,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:27,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630375831] [2021-05-22 02:23:27,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630375831] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:27,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:27,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:27,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757791594] [2021-05-22 02:23:27,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:27,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:27,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:27,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:27,699 INFO L87 Difference]: Start difference. First operand 181 states and 528 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:27,766 INFO L93 Difference]: Finished difference Result 437 states and 1201 transitions. [2021-05-22 02:23:27,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:27,766 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:27,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:27,767 INFO L225 Difference]: With dead ends: 437 [2021-05-22 02:23:27,767 INFO L226 Difference]: Without dead ends: 422 [2021-05-22 02:23:27,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:27,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-05-22 02:23:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 184. [2021-05-22 02:23:27,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9672131147540983) internal successors, (543), 183 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 543 transitions. [2021-05-22 02:23:27,771 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 543 transitions. Word has length 17 [2021-05-22 02:23:27,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:27,771 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 543 transitions. [2021-05-22 02:23:27,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,771 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 543 transitions. [2021-05-22 02:23:27,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:27,771 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:27,771 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:27,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-22 02:23:27,771 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:27,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:27,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2035634772, now seen corresponding path program 38 times [2021-05-22 02:23:27,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:27,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037986278] [2021-05-22 02:23:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:27,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:27,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037986278] [2021-05-22 02:23:27,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037986278] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:27,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:27,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:27,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820290591] [2021-05-22 02:23:27,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:27,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:27,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:27,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:27,807 INFO L87 Difference]: Start difference. First operand 184 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:27,893 INFO L93 Difference]: Finished difference Result 435 states and 1194 transitions. [2021-05-22 02:23:27,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:27,893 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:27,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:27,894 INFO L225 Difference]: With dead ends: 435 [2021-05-22 02:23:27,894 INFO L226 Difference]: Without dead ends: 420 [2021-05-22 02:23:27,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:27,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-05-22 02:23:27,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 182. [2021-05-22 02:23:27,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9502762430939224) internal successors, (534), 181 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-05-22 02:23:27,897 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-05-22 02:23:27,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:27,897 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-05-22 02:23:27,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,897 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-05-22 02:23:27,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:27,898 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:27,898 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:27,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-22 02:23:27,898 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:27,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:27,898 INFO L82 PathProgramCache]: Analyzing trace with hash -51636616, now seen corresponding path program 39 times [2021-05-22 02:23:27,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:27,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403213964] [2021-05-22 02:23:27,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:27,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:27,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403213964] [2021-05-22 02:23:27,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403213964] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:27,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:27,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:27,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965437065] [2021-05-22 02:23:27,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:27,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:27,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:27,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:27,951 INFO L87 Difference]: Start difference. First operand 182 states and 534 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:28,027 INFO L93 Difference]: Finished difference Result 468 states and 1258 transitions. [2021-05-22 02:23:28,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:28,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:28,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:28,042 INFO L225 Difference]: With dead ends: 468 [2021-05-22 02:23:28,042 INFO L226 Difference]: Without dead ends: 453 [2021-05-22 02:23:28,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:28,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-05-22 02:23:28,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 185. [2021-05-22 02:23:28,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9782608695652173) internal successors, (548), 184 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 548 transitions. [2021-05-22 02:23:28,045 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 548 transitions. Word has length 17 [2021-05-22 02:23:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:28,045 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 548 transitions. [2021-05-22 02:23:28,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,046 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 548 transitions. [2021-05-22 02:23:28,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:28,046 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:28,046 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:28,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-22 02:23:28,046 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:28,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:28,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1221825612, now seen corresponding path program 40 times [2021-05-22 02:23:28,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:28,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234943139] [2021-05-22 02:23:28,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:28,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:28,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234943139] [2021-05-22 02:23:28,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234943139] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:28,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:28,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:28,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669244160] [2021-05-22 02:23:28,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:28,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:28,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:28,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:28,084 INFO L87 Difference]: Start difference. First operand 185 states and 548 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:28,149 INFO L93 Difference]: Finished difference Result 452 states and 1235 transitions. [2021-05-22 02:23:28,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:28,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:28,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:28,150 INFO L225 Difference]: With dead ends: 452 [2021-05-22 02:23:28,150 INFO L226 Difference]: Without dead ends: 437 [2021-05-22 02:23:28,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:28,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-05-22 02:23:28,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 182. [2021-05-22 02:23:28,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9502762430939224) internal successors, (534), 181 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-05-22 02:23:28,163 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-05-22 02:23:28,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:28,163 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-05-22 02:23:28,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,164 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-05-22 02:23:28,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:28,164 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:28,164 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:28,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-22 02:23:28,164 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:28,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:28,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1238762664, now seen corresponding path program 41 times [2021-05-22 02:23:28,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:28,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465208601] [2021-05-22 02:23:28,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:28,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:28,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:28,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465208601] [2021-05-22 02:23:28,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465208601] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:28,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:28,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:28,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735478334] [2021-05-22 02:23:28,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:28,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:28,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:28,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:28,209 INFO L87 Difference]: Start difference. First operand 182 states and 534 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:28,284 INFO L93 Difference]: Finished difference Result 446 states and 1215 transitions. [2021-05-22 02:23:28,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:28,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:28,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:28,285 INFO L225 Difference]: With dead ends: 446 [2021-05-22 02:23:28,285 INFO L226 Difference]: Without dead ends: 431 [2021-05-22 02:23:28,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:28,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-05-22 02:23:28,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 184. [2021-05-22 02:23:28,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9672131147540983) internal successors, (543), 183 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 543 transitions. [2021-05-22 02:23:28,288 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 543 transitions. Word has length 17 [2021-05-22 02:23:28,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:28,288 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 543 transitions. [2021-05-22 02:23:28,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,288 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 543 transitions. [2021-05-22 02:23:28,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:28,289 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:28,289 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:28,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-22 02:23:28,289 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:28,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:28,289 INFO L82 PathProgramCache]: Analyzing trace with hash -98478828, now seen corresponding path program 42 times [2021-05-22 02:23:28,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:28,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423550531] [2021-05-22 02:23:28,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:28,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:28,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423550531] [2021-05-22 02:23:28,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423550531] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:28,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:28,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:28,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085168152] [2021-05-22 02:23:28,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:28,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:28,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:28,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:28,325 INFO L87 Difference]: Start difference. First operand 184 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:28,402 INFO L93 Difference]: Finished difference Result 425 states and 1177 transitions. [2021-05-22 02:23:28,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:28,403 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:28,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:28,403 INFO L225 Difference]: With dead ends: 425 [2021-05-22 02:23:28,403 INFO L226 Difference]: Without dead ends: 410 [2021-05-22 02:23:28,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:28,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-05-22 02:23:28,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 179. [2021-05-22 02:23:28,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.9101123595505616) internal successors, (518), 178 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 518 transitions. [2021-05-22 02:23:28,409 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 518 transitions. Word has length 17 [2021-05-22 02:23:28,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:28,409 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 518 transitions. [2021-05-22 02:23:28,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,409 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 518 transitions. [2021-05-22 02:23:28,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:28,409 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:28,409 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:28,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-22 02:23:28,409 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:28,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:28,410 INFO L82 PathProgramCache]: Analyzing trace with hash -485249606, now seen corresponding path program 43 times [2021-05-22 02:23:28,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:28,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297606475] [2021-05-22 02:23:28,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:28,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:28,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297606475] [2021-05-22 02:23:28,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297606475] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:28,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:28,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:28,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559633094] [2021-05-22 02:23:28,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:28,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:28,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:28,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:28,437 INFO L87 Difference]: Start difference. First operand 179 states and 518 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:28,512 INFO L93 Difference]: Finished difference Result 323 states and 889 transitions. [2021-05-22 02:23:28,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:28,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:28,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:28,513 INFO L225 Difference]: With dead ends: 323 [2021-05-22 02:23:28,513 INFO L226 Difference]: Without dead ends: 308 [2021-05-22 02:23:28,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:28,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-22 02:23:28,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 187. [2021-05-22 02:23:28,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.913978494623656) internal successors, (542), 186 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 542 transitions. [2021-05-22 02:23:28,517 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 542 transitions. Word has length 17 [2021-05-22 02:23:28,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:28,517 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 542 transitions. [2021-05-22 02:23:28,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,517 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 542 transitions. [2021-05-22 02:23:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:28,517 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:28,517 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:28,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-22 02:23:28,517 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:28,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:28,518 INFO L82 PathProgramCache]: Analyzing trace with hash 2038445248, now seen corresponding path program 44 times [2021-05-22 02:23:28,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:28,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377575345] [2021-05-22 02:23:28,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:28,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:28,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377575345] [2021-05-22 02:23:28,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377575345] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:28,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:28,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:28,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898132312] [2021-05-22 02:23:28,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:28,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:28,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:28,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:28,548 INFO L87 Difference]: Start difference. First operand 187 states and 542 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:28,626 INFO L93 Difference]: Finished difference Result 353 states and 951 transitions. [2021-05-22 02:23:28,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:28,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:28,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:28,627 INFO L225 Difference]: With dead ends: 353 [2021-05-22 02:23:28,627 INFO L226 Difference]: Without dead ends: 338 [2021-05-22 02:23:28,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:28,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-22 02:23:28,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 189. [2021-05-22 02:23:28,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9308510638297873) internal successors, (551), 188 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 551 transitions. [2021-05-22 02:23:28,630 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 551 transitions. Word has length 17 [2021-05-22 02:23:28,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:28,630 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 551 transitions. [2021-05-22 02:23:28,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,631 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 551 transitions. [2021-05-22 02:23:28,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:28,631 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:28,631 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:28,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-22 02:23:28,631 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:28,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:28,631 INFO L82 PathProgramCache]: Analyzing trace with hash 412660612, now seen corresponding path program 45 times [2021-05-22 02:23:28,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:28,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154206761] [2021-05-22 02:23:28,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:28,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:28,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154206761] [2021-05-22 02:23:28,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154206761] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:28,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:28,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:28,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427986602] [2021-05-22 02:23:28,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:28,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:28,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:28,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:28,660 INFO L87 Difference]: Start difference. First operand 189 states and 551 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:28,742 INFO L93 Difference]: Finished difference Result 336 states and 921 transitions. [2021-05-22 02:23:28,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:28,743 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:28,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:28,743 INFO L225 Difference]: With dead ends: 336 [2021-05-22 02:23:28,743 INFO L226 Difference]: Without dead ends: 321 [2021-05-22 02:23:28,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:28,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-22 02:23:28,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 183. [2021-05-22 02:23:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.901098901098901) internal successors, (528), 182 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 528 transitions. [2021-05-22 02:23:28,746 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 528 transitions. Word has length 17 [2021-05-22 02:23:28,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:28,746 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 528 transitions. [2021-05-22 02:23:28,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,746 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 528 transitions. [2021-05-22 02:23:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:28,747 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:28,747 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:28,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-22 02:23:28,747 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:28,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:28,747 INFO L82 PathProgramCache]: Analyzing trace with hash 379489126, now seen corresponding path program 46 times [2021-05-22 02:23:28,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:28,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035903574] [2021-05-22 02:23:28,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:28,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:28,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035903574] [2021-05-22 02:23:28,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035903574] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:28,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:28,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:28,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931113926] [2021-05-22 02:23:28,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:28,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:28,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:28,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:28,780 INFO L87 Difference]: Start difference. First operand 183 states and 528 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:28,866 INFO L93 Difference]: Finished difference Result 324 states and 889 transitions. [2021-05-22 02:23:28,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:28,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:28,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:28,867 INFO L225 Difference]: With dead ends: 324 [2021-05-22 02:23:28,867 INFO L226 Difference]: Without dead ends: 309 [2021-05-22 02:23:28,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-22 02:23:28,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 189. [2021-05-22 02:23:28,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.8882978723404253) internal successors, (543), 188 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 543 transitions. [2021-05-22 02:23:28,870 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 543 transitions. Word has length 17 [2021-05-22 02:23:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:28,870 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 543 transitions. [2021-05-22 02:23:28,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,870 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 543 transitions. [2021-05-22 02:23:28,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:28,870 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:28,870 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:28,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-22 02:23:28,870 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:28,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:28,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1252190110, now seen corresponding path program 47 times [2021-05-22 02:23:28,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:28,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171888906] [2021-05-22 02:23:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:28,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:28,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171888906] [2021-05-22 02:23:28,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171888906] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:28,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:28,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:28,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939521191] [2021-05-22 02:23:28,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:28,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:28,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:28,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:28,905 INFO L87 Difference]: Start difference. First operand 189 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:28,980 INFO L93 Difference]: Finished difference Result 354 states and 954 transitions. [2021-05-22 02:23:28,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:28,980 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:28,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:28,981 INFO L225 Difference]: With dead ends: 354 [2021-05-22 02:23:28,981 INFO L226 Difference]: Without dead ends: 339 [2021-05-22 02:23:28,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:28,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-22 02:23:28,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 191. [2021-05-22 02:23:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.905263157894737) internal successors, (552), 190 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 552 transitions. [2021-05-22 02:23:28,984 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 552 transitions. Word has length 17 [2021-05-22 02:23:28,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:28,984 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 552 transitions. [2021-05-22 02:23:28,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,984 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 552 transitions. [2021-05-22 02:23:28,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:28,985 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:28,985 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:28,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-22 02:23:28,985 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:28,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:28,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1416992550, now seen corresponding path program 48 times [2021-05-22 02:23:28,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:28,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486563578] [2021-05-22 02:23:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:29,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:29,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486563578] [2021-05-22 02:23:29,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486563578] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:29,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:29,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:29,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776616573] [2021-05-22 02:23:29,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:29,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:29,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:29,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:29,021 INFO L87 Difference]: Start difference. First operand 191 states and 552 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:29,104 INFO L93 Difference]: Finished difference Result 333 states and 916 transitions. [2021-05-22 02:23:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:29,105 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:29,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:29,105 INFO L225 Difference]: With dead ends: 333 [2021-05-22 02:23:29,105 INFO L226 Difference]: Without dead ends: 318 [2021-05-22 02:23:29,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:29,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-22 02:23:29,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 189. [2021-05-22 02:23:29,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.8882978723404253) internal successors, (543), 188 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 543 transitions. [2021-05-22 02:23:29,108 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 543 transitions. Word has length 17 [2021-05-22 02:23:29,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:29,109 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 543 transitions. [2021-05-22 02:23:29,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,109 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 543 transitions. [2021-05-22 02:23:29,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:29,109 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:29,109 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:29,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-22 02:23:29,109 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:29,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:29,109 INFO L82 PathProgramCache]: Analyzing trace with hash -167418646, now seen corresponding path program 49 times [2021-05-22 02:23:29,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:29,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168738560] [2021-05-22 02:23:29,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:29,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:29,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168738560] [2021-05-22 02:23:29,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168738560] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:29,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:29,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:29,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497283170] [2021-05-22 02:23:29,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:29,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:29,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:29,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:29,145 INFO L87 Difference]: Start difference. First operand 189 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:29,219 INFO L93 Difference]: Finished difference Result 386 states and 1068 transitions. [2021-05-22 02:23:29,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:29,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:29,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:29,220 INFO L225 Difference]: With dead ends: 386 [2021-05-22 02:23:29,220 INFO L226 Difference]: Without dead ends: 371 [2021-05-22 02:23:29,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:29,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-05-22 02:23:29,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 194. [2021-05-22 02:23:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.922279792746114) internal successors, (564), 193 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 564 transitions. [2021-05-22 02:23:29,223 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 564 transitions. Word has length 17 [2021-05-22 02:23:29,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:29,223 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 564 transitions. [2021-05-22 02:23:29,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,224 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 564 transitions. [2021-05-22 02:23:29,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:29,224 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:29,224 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:29,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-22 02:23:29,224 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:29,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:29,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1386054006, now seen corresponding path program 50 times [2021-05-22 02:23:29,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:29,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798675044] [2021-05-22 02:23:29,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:29,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:29,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798675044] [2021-05-22 02:23:29,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798675044] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:29,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:29,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:29,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885540944] [2021-05-22 02:23:29,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:29,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:29,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:29,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:29,267 INFO L87 Difference]: Start difference. First operand 194 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:29,352 INFO L93 Difference]: Finished difference Result 390 states and 1074 transitions. [2021-05-22 02:23:29,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:29,353 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:29,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:29,353 INFO L225 Difference]: With dead ends: 390 [2021-05-22 02:23:29,353 INFO L226 Difference]: Without dead ends: 375 [2021-05-22 02:23:29,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:29,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-22 02:23:29,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 192. [2021-05-22 02:23:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-05-22 02:23:29,357 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-05-22 02:23:29,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:29,357 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-05-22 02:23:29,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,357 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-05-22 02:23:29,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:29,357 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:29,357 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:29,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-22 02:23:29,357 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:29,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:29,358 INFO L82 PathProgramCache]: Analyzing trace with hash -310342850, now seen corresponding path program 51 times [2021-05-22 02:23:29,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:29,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608765065] [2021-05-22 02:23:29,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:29,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:29,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608765065] [2021-05-22 02:23:29,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608765065] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:29,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:29,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:29,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628535217] [2021-05-22 02:23:29,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:29,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:29,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:29,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:29,391 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:29,470 INFO L93 Difference]: Finished difference Result 386 states and 1060 transitions. [2021-05-22 02:23:29,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:29,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:29,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:29,471 INFO L225 Difference]: With dead ends: 386 [2021-05-22 02:23:29,471 INFO L226 Difference]: Without dead ends: 371 [2021-05-22 02:23:29,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:29,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-05-22 02:23:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 192. [2021-05-22 02:23:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-05-22 02:23:29,475 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-05-22 02:23:29,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:29,475 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-05-22 02:23:29,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,475 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-05-22 02:23:29,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:29,475 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:29,475 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:29,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-22 02:23:29,475 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:29,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:29,476 INFO L82 PathProgramCache]: Analyzing trace with hash -548101402, now seen corresponding path program 52 times [2021-05-22 02:23:29,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:29,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308681840] [2021-05-22 02:23:29,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:29,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:29,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:29,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308681840] [2021-05-22 02:23:29,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308681840] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:29,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:29,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:29,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810443750] [2021-05-22 02:23:29,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:29,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:29,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:29,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:29,510 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:29,584 INFO L93 Difference]: Finished difference Result 464 states and 1256 transitions. [2021-05-22 02:23:29,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:29,584 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:29,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:29,585 INFO L225 Difference]: With dead ends: 464 [2021-05-22 02:23:29,585 INFO L226 Difference]: Without dead ends: 449 [2021-05-22 02:23:29,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:29,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-05-22 02:23:29,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 195. [2021-05-22 02:23:29,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9381443298969074) internal successors, (570), 194 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 570 transitions. [2021-05-22 02:23:29,589 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 570 transitions. Word has length 17 [2021-05-22 02:23:29,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:29,589 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 570 transitions. [2021-05-22 02:23:29,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,589 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 570 transitions. [2021-05-22 02:23:29,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:29,589 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:29,590 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:29,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-22 02:23:29,590 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:29,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:29,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1766736762, now seen corresponding path program 53 times [2021-05-22 02:23:29,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:29,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431459936] [2021-05-22 02:23:29,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:29,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:29,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431459936] [2021-05-22 02:23:29,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431459936] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:29,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:29,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:29,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387404640] [2021-05-22 02:23:29,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:29,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:29,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:29,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:29,622 INFO L87 Difference]: Start difference. First operand 195 states and 570 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:29,692 INFO L93 Difference]: Finished difference Result 468 states and 1262 transitions. [2021-05-22 02:23:29,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:29,692 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:29,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:29,693 INFO L225 Difference]: With dead ends: 468 [2021-05-22 02:23:29,693 INFO L226 Difference]: Without dead ends: 453 [2021-05-22 02:23:29,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:29,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-05-22 02:23:29,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 193. [2021-05-22 02:23:29,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.921875) internal successors, (561), 192 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 561 transitions. [2021-05-22 02:23:29,697 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 561 transitions. Word has length 17 [2021-05-22 02:23:29,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:29,697 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 561 transitions. [2021-05-22 02:23:29,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,697 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 561 transitions. [2021-05-22 02:23:29,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:29,697 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:29,697 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:29,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-22 02:23:29,697 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:29,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:29,698 INFO L82 PathProgramCache]: Analyzing trace with hash 440959146, now seen corresponding path program 54 times [2021-05-22 02:23:29,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:29,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865116642] [2021-05-22 02:23:29,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:29,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:29,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865116642] [2021-05-22 02:23:29,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865116642] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:29,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:29,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:29,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330446133] [2021-05-22 02:23:29,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:29,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:29,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:29,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:29,729 INFO L87 Difference]: Start difference. First operand 193 states and 561 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:29,795 INFO L93 Difference]: Finished difference Result 431 states and 1182 transitions. [2021-05-22 02:23:29,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:29,795 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:29,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:29,796 INFO L225 Difference]: With dead ends: 431 [2021-05-22 02:23:29,796 INFO L226 Difference]: Without dead ends: 416 [2021-05-22 02:23:29,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:29,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-05-22 02:23:29,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 196. [2021-05-22 02:23:29,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.948717948717949) internal successors, (575), 195 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 575 transitions. [2021-05-22 02:23:29,799 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 575 transitions. Word has length 17 [2021-05-22 02:23:29,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:29,800 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 575 transitions. [2021-05-22 02:23:29,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,800 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 575 transitions. [2021-05-22 02:23:29,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:29,800 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:29,800 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:29,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-22 02:23:29,800 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:29,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:29,800 INFO L82 PathProgramCache]: Analyzing trace with hash -729229850, now seen corresponding path program 55 times [2021-05-22 02:23:29,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:29,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416286292] [2021-05-22 02:23:29,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:29,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:29,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416286292] [2021-05-22 02:23:29,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416286292] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:29,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:29,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:29,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332166957] [2021-05-22 02:23:29,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:29,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:29,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:29,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:29,834 INFO L87 Difference]: Start difference. First operand 196 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:29,900 INFO L93 Difference]: Finished difference Result 415 states and 1159 transitions. [2021-05-22 02:23:29,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:29,901 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:29,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:29,901 INFO L225 Difference]: With dead ends: 415 [2021-05-22 02:23:29,901 INFO L226 Difference]: Without dead ends: 400 [2021-05-22 02:23:29,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:29,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-05-22 02:23:29,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 193. [2021-05-22 02:23:29,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.921875) internal successors, (561), 192 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 561 transitions. [2021-05-22 02:23:29,905 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 561 transitions. Word has length 17 [2021-05-22 02:23:29,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:29,905 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 561 transitions. [2021-05-22 02:23:29,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,905 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 561 transitions. [2021-05-22 02:23:29,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:29,905 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:29,905 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:29,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-22 02:23:29,905 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:29,905 INFO L82 PathProgramCache]: Analyzing trace with hash -746166902, now seen corresponding path program 56 times [2021-05-22 02:23:29,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:29,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342641884] [2021-05-22 02:23:29,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:29,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:29,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342641884] [2021-05-22 02:23:29,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342641884] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:29,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:29,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:29,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438068783] [2021-05-22 02:23:29,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:29,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:29,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:29,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:29,949 INFO L87 Difference]: Start difference. First operand 193 states and 561 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:30,029 INFO L93 Difference]: Finished difference Result 449 states and 1229 transitions. [2021-05-22 02:23:30,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:30,030 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:30,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:30,031 INFO L225 Difference]: With dead ends: 449 [2021-05-22 02:23:30,031 INFO L226 Difference]: Without dead ends: 434 [2021-05-22 02:23:30,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:30,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-05-22 02:23:30,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 195. [2021-05-22 02:23:30,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9381443298969074) internal successors, (570), 194 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 570 transitions. [2021-05-22 02:23:30,034 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 570 transitions. Word has length 17 [2021-05-22 02:23:30,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:30,034 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 570 transitions. [2021-05-22 02:23:30,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,034 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 570 transitions. [2021-05-22 02:23:30,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:30,035 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:30,035 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:30,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-22 02:23:30,035 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:30,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:30,035 INFO L82 PathProgramCache]: Analyzing trace with hash 394116934, now seen corresponding path program 57 times [2021-05-22 02:23:30,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:30,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806305972] [2021-05-22 02:23:30,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:30,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:30,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806305972] [2021-05-22 02:23:30,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806305972] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:30,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:30,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:30,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697985392] [2021-05-22 02:23:30,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:30,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:30,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:30,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:30,070 INFO L87 Difference]: Start difference. First operand 195 states and 570 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:30,157 INFO L93 Difference]: Finished difference Result 428 states and 1191 transitions. [2021-05-22 02:23:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:30,157 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:30,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:30,158 INFO L225 Difference]: With dead ends: 428 [2021-05-22 02:23:30,158 INFO L226 Difference]: Without dead ends: 413 [2021-05-22 02:23:30,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:30,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-05-22 02:23:30,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 192. [2021-05-22 02:23:30,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-05-22 02:23:30,161 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-05-22 02:23:30,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:30,161 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-05-22 02:23:30,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,161 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-05-22 02:23:30,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:30,162 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:30,162 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:30,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-22 02:23:30,162 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:30,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:30,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1262551738, now seen corresponding path program 58 times [2021-05-22 02:23:30,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:30,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066853538] [2021-05-22 02:23:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:30,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:30,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066853538] [2021-05-22 02:23:30,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066853538] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:30,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:30,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:30,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187497213] [2021-05-22 02:23:30,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:30,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:30,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:30,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:30,193 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:30,261 INFO L93 Difference]: Finished difference Result 429 states and 1161 transitions. [2021-05-22 02:23:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:30,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:30,262 INFO L225 Difference]: With dead ends: 429 [2021-05-22 02:23:30,262 INFO L226 Difference]: Without dead ends: 414 [2021-05-22 02:23:30,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:30,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-22 02:23:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 194. [2021-05-22 02:23:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.911917098445596) internal successors, (562), 193 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 562 transitions. [2021-05-22 02:23:30,265 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 562 transitions. Word has length 17 [2021-05-22 02:23:30,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:30,265 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 562 transitions. [2021-05-22 02:23:30,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 562 transitions. [2021-05-22 02:23:30,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:30,266 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:30,266 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:30,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-22 02:23:30,266 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:30,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:30,266 INFO L82 PathProgramCache]: Analyzing trace with hash -2074864322, now seen corresponding path program 59 times [2021-05-22 02:23:30,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:30,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50692344] [2021-05-22 02:23:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:30,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:30,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50692344] [2021-05-22 02:23:30,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50692344] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:30,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:30,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:30,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506134743] [2021-05-22 02:23:30,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:30,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:30,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:30,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:30,296 INFO L87 Difference]: Start difference. First operand 194 states and 562 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:30,373 INFO L93 Difference]: Finished difference Result 430 states and 1172 transitions. [2021-05-22 02:23:30,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:30,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:30,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:30,374 INFO L225 Difference]: With dead ends: 430 [2021-05-22 02:23:30,375 INFO L226 Difference]: Without dead ends: 415 [2021-05-22 02:23:30,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:30,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-05-22 02:23:30,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 196. [2021-05-22 02:23:30,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.928205128205128) internal successors, (571), 195 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 571 transitions. [2021-05-22 02:23:30,378 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 571 transitions. Word has length 17 [2021-05-22 02:23:30,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:30,378 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 571 transitions. [2021-05-22 02:23:30,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,378 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 571 transitions. [2021-05-22 02:23:30,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:30,379 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:30,379 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:30,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-22 02:23:30,379 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:30,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:30,379 INFO L82 PathProgramCache]: Analyzing trace with hash -934580486, now seen corresponding path program 60 times [2021-05-22 02:23:30,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:30,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042843736] [2021-05-22 02:23:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:30,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:30,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042843736] [2021-05-22 02:23:30,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042843736] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:30,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:30,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:30,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612081770] [2021-05-22 02:23:30,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:30,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:30,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:30,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:30,413 INFO L87 Difference]: Start difference. First operand 196 states and 571 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:30,502 INFO L93 Difference]: Finished difference Result 409 states and 1134 transitions. [2021-05-22 02:23:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:30,502 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:30,503 INFO L225 Difference]: With dead ends: 409 [2021-05-22 02:23:30,503 INFO L226 Difference]: Without dead ends: 394 [2021-05-22 02:23:30,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:30,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-22 02:23:30,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 192. [2021-05-22 02:23:30,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-05-22 02:23:30,506 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-05-22 02:23:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:30,506 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-05-22 02:23:30,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-05-22 02:23:30,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:30,507 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:30,507 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:30,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-22 02:23:30,507 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:30,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:30,507 INFO L82 PathProgramCache]: Analyzing trace with hash -674451760, now seen corresponding path program 61 times [2021-05-22 02:23:30,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:30,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951327122] [2021-05-22 02:23:30,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:30,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:30,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951327122] [2021-05-22 02:23:30,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951327122] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:30,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:30,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:30,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287820492] [2021-05-22 02:23:30,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:30,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:30,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:30,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:30,539 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:30,612 INFO L93 Difference]: Finished difference Result 328 states and 903 transitions. [2021-05-22 02:23:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:30,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:30,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:30,613 INFO L225 Difference]: With dead ends: 328 [2021-05-22 02:23:30,613 INFO L226 Difference]: Without dead ends: 313 [2021-05-22 02:23:30,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:30,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-05-22 02:23:30,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 197. [2021-05-22 02:23:30,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.913265306122449) internal successors, (571), 196 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 571 transitions. [2021-05-22 02:23:30,616 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 571 transitions. Word has length 17 [2021-05-22 02:23:30,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:30,616 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 571 transitions. [2021-05-22 02:23:30,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,616 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 571 transitions. [2021-05-22 02:23:30,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:30,616 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:30,616 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:30,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-22 02:23:30,616 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:30,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:30,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1924375180, now seen corresponding path program 62 times [2021-05-22 02:23:30,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:30,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354913209] [2021-05-22 02:23:30,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:30,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:30,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354913209] [2021-05-22 02:23:30,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354913209] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:30,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:30,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:30,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028316264] [2021-05-22 02:23:30,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:30,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:30,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:30,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:30,648 INFO L87 Difference]: Start difference. First operand 197 states and 571 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:30,736 INFO L93 Difference]: Finished difference Result 357 states and 963 transitions. [2021-05-22 02:23:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:30,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:30,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:30,737 INFO L225 Difference]: With dead ends: 357 [2021-05-22 02:23:30,737 INFO L226 Difference]: Without dead ends: 342 [2021-05-22 02:23:30,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:30,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-05-22 02:23:30,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 199. [2021-05-22 02:23:30,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9292929292929295) internal successors, (580), 198 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-05-22 02:23:30,741 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-05-22 02:23:30,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:30,741 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-05-22 02:23:30,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,741 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-05-22 02:23:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:30,741 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:30,741 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:30,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-22 02:23:30,742 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:30,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:30,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1151956756, now seen corresponding path program 63 times [2021-05-22 02:23:30,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:30,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534725587] [2021-05-22 02:23:30,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:30,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:30,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534725587] [2021-05-22 02:23:30,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534725587] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:30,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:30,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:30,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225914696] [2021-05-22 02:23:30,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:30,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:30,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:30,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:30,772 INFO L87 Difference]: Start difference. First operand 199 states and 580 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:30,852 INFO L93 Difference]: Finished difference Result 334 states and 918 transitions. [2021-05-22 02:23:30,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:30,852 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:30,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:30,853 INFO L225 Difference]: With dead ends: 334 [2021-05-22 02:23:30,853 INFO L226 Difference]: Without dead ends: 319 [2021-05-22 02:23:30,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:30,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-05-22 02:23:30,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 195. [2021-05-22 02:23:30,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-05-22 02:23:30,856 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-05-22 02:23:30,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:30,856 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-05-22 02:23:30,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,856 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-05-22 02:23:30,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:30,856 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:30,856 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:30,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-22 02:23:30,856 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:30,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:30,857 INFO L82 PathProgramCache]: Analyzing trace with hash 263807996, now seen corresponding path program 64 times [2021-05-22 02:23:30,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:30,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155799773] [2021-05-22 02:23:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:30,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:30,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155799773] [2021-05-22 02:23:30,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155799773] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:30,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:30,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:30,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648477659] [2021-05-22 02:23:30,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:30,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:30,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:30,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:30,891 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:30,974 INFO L93 Difference]: Finished difference Result 349 states and 945 transitions. [2021-05-22 02:23:30,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:30,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:30,975 INFO L225 Difference]: With dead ends: 349 [2021-05-22 02:23:30,975 INFO L226 Difference]: Without dead ends: 334 [2021-05-22 02:23:30,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:30,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-22 02:23:30,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 199. [2021-05-22 02:23:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9292929292929295) internal successors, (580), 198 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-05-22 02:23:30,978 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-05-22 02:23:30,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:30,978 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-05-22 02:23:30,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,978 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-05-22 02:23:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:30,979 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:30,979 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:30,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-22 02:23:30,979 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:30,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:30,979 INFO L82 PathProgramCache]: Analyzing trace with hash -954827364, now seen corresponding path program 65 times [2021-05-22 02:23:30,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:30,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013423359] [2021-05-22 02:23:30,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:31,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:31,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013423359] [2021-05-22 02:23:31,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013423359] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:31,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:31,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:31,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127942663] [2021-05-22 02:23:31,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:31,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:31,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:31,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:31,024 INFO L87 Difference]: Start difference. First operand 199 states and 580 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:31,123 INFO L93 Difference]: Finished difference Result 353 states and 951 transitions. [2021-05-22 02:23:31,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:31,124 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:31,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:31,124 INFO L225 Difference]: With dead ends: 353 [2021-05-22 02:23:31,124 INFO L226 Difference]: Without dead ends: 338 [2021-05-22 02:23:31,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:31,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-22 02:23:31,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 197. [2021-05-22 02:23:31,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.913265306122449) internal successors, (571), 196 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 571 transitions. [2021-05-22 02:23:31,128 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 571 transitions. Word has length 17 [2021-05-22 02:23:31,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:31,128 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 571 transitions. [2021-05-22 02:23:31,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,128 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 571 transitions. [2021-05-22 02:23:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:31,128 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:31,128 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:31,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-22 02:23:31,129 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:31,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:31,129 INFO L82 PathProgramCache]: Analyzing trace with hash 120883792, now seen corresponding path program 66 times [2021-05-22 02:23:31,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:31,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162840716] [2021-05-22 02:23:31,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:31,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:31,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162840716] [2021-05-22 02:23:31,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162840716] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:31,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:31,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:31,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826041743] [2021-05-22 02:23:31,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:31,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:31,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:31,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:31,159 INFO L87 Difference]: Start difference. First operand 197 states and 571 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:31,239 INFO L93 Difference]: Finished difference Result 324 states and 891 transitions. [2021-05-22 02:23:31,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:31,239 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:31,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:31,240 INFO L225 Difference]: With dead ends: 324 [2021-05-22 02:23:31,240 INFO L226 Difference]: Without dead ends: 309 [2021-05-22 02:23:31,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:31,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-22 02:23:31,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 195. [2021-05-22 02:23:31,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-05-22 02:23:31,243 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-05-22 02:23:31,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:31,243 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-05-22 02:23:31,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,243 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-05-22 02:23:31,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:31,243 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:31,243 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:31,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-22 02:23:31,243 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:31,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:31,244 INFO L82 PathProgramCache]: Analyzing trace with hash 409284692, now seen corresponding path program 67 times [2021-05-22 02:23:31,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:31,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034942020] [2021-05-22 02:23:31,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:31,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:31,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034942020] [2021-05-22 02:23:31,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034942020] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:31,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:31,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:31,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966088007] [2021-05-22 02:23:31,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:31,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:31,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:31,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:31,285 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:31,367 INFO L93 Difference]: Finished difference Result 442 states and 1201 transitions. [2021-05-22 02:23:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:31,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:31,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:31,368 INFO L225 Difference]: With dead ends: 442 [2021-05-22 02:23:31,368 INFO L226 Difference]: Without dead ends: 427 [2021-05-22 02:23:31,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:31,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-22 02:23:31,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 198. [2021-05-22 02:23:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9238578680203045) internal successors, (576), 197 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-05-22 02:23:31,371 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-05-22 02:23:31,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:31,371 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-05-22 02:23:31,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,371 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-05-22 02:23:31,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:31,372 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:31,372 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:31,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-22 02:23:31,372 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:31,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:31,372 INFO L82 PathProgramCache]: Analyzing trace with hash -840638728, now seen corresponding path program 68 times [2021-05-22 02:23:31,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:31,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249966946] [2021-05-22 02:23:31,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:31,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:31,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249966946] [2021-05-22 02:23:31,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249966946] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:31,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:31,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:31,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872621576] [2021-05-22 02:23:31,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:31,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:31,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:31,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:31,406 INFO L87 Difference]: Start difference. First operand 198 states and 576 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:31,493 INFO L93 Difference]: Finished difference Result 465 states and 1248 transitions. [2021-05-22 02:23:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:31,493 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:31,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:31,494 INFO L225 Difference]: With dead ends: 465 [2021-05-22 02:23:31,494 INFO L226 Difference]: Without dead ends: 450 [2021-05-22 02:23:31,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:31,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-22 02:23:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 200. [2021-05-22 02:23:31,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.9396984924623117) internal successors, (585), 199 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-05-22 02:23:31,497 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-05-22 02:23:31,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:31,498 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-05-22 02:23:31,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-05-22 02:23:31,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:31,498 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:31,498 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:31,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-22 02:23:31,498 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:31,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:31,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2059274088, now seen corresponding path program 69 times [2021-05-22 02:23:31,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:31,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115805901] [2021-05-22 02:23:31,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:31,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:31,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115805901] [2021-05-22 02:23:31,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115805901] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:31,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:31,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:31,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277610110] [2021-05-22 02:23:31,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:31,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:31,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:31,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:31,537 INFO L87 Difference]: Start difference. First operand 200 states and 585 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:31,621 INFO L93 Difference]: Finished difference Result 442 states and 1203 transitions. [2021-05-22 02:23:31,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:31,621 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:31,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:31,622 INFO L225 Difference]: With dead ends: 442 [2021-05-22 02:23:31,622 INFO L226 Difference]: Without dead ends: 427 [2021-05-22 02:23:31,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:31,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-22 02:23:31,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 196. [2021-05-22 02:23:31,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-05-22 02:23:31,627 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-05-22 02:23:31,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:31,627 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-05-22 02:23:31,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,627 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-05-22 02:23:31,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:31,629 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:31,629 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:31,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-22 02:23:31,629 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:31,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:31,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1005390608, now seen corresponding path program 70 times [2021-05-22 02:23:31,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:31,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707029354] [2021-05-22 02:23:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:31,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:31,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707029354] [2021-05-22 02:23:31,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707029354] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:31,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:31,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:31,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904312978] [2021-05-22 02:23:31,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:31,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:31,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:31,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:31,660 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:31,745 INFO L93 Difference]: Finished difference Result 393 states and 1085 transitions. [2021-05-22 02:23:31,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:31,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:31,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:31,746 INFO L225 Difference]: With dead ends: 393 [2021-05-22 02:23:31,746 INFO L226 Difference]: Without dead ends: 378 [2021-05-22 02:23:31,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:31,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-05-22 02:23:31,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 199. [2021-05-22 02:23:31,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9292929292929295) internal successors, (580), 198 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-05-22 02:23:31,751 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-05-22 02:23:31,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:31,751 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-05-22 02:23:31,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-05-22 02:23:31,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:31,752 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:31,752 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:31,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-22 02:23:31,753 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:31,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:31,753 INFO L82 PathProgramCache]: Analyzing trace with hash 184219092, now seen corresponding path program 71 times [2021-05-22 02:23:31,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:31,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026291538] [2021-05-22 02:23:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:31,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:31,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:31,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026291538] [2021-05-22 02:23:31,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026291538] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:31,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:31,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:31,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3910634] [2021-05-22 02:23:31,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:31,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:31,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:31,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:31,786 INFO L87 Difference]: Start difference. First operand 199 states and 580 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:31,867 INFO L93 Difference]: Finished difference Result 391 states and 1089 transitions. [2021-05-22 02:23:31,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:31,867 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:31,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:31,867 INFO L225 Difference]: With dead ends: 391 [2021-05-22 02:23:31,867 INFO L226 Difference]: Without dead ends: 376 [2021-05-22 02:23:31,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:31,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-22 02:23:31,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 202. [2021-05-22 02:23:31,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.955223880597015) internal successors, (594), 201 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 594 transitions. [2021-05-22 02:23:31,870 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 594 transitions. Word has length 17 [2021-05-22 02:23:31,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:31,871 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 594 transitions. [2021-05-22 02:23:31,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,871 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 594 transitions. [2021-05-22 02:23:31,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:31,871 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:31,871 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:31,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-22 02:23:31,871 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:31,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:31,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1514501296, now seen corresponding path program 72 times [2021-05-22 02:23:31,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:31,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394136005] [2021-05-22 02:23:31,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:31,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:31,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394136005] [2021-05-22 02:23:31,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394136005] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:31,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:31,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:31,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941508624] [2021-05-22 02:23:31,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:31,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:31,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:31,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:31,915 INFO L87 Difference]: Start difference. First operand 202 states and 594 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:31,985 INFO L93 Difference]: Finished difference Result 368 states and 1044 transitions. [2021-05-22 02:23:31,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:31,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:31,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:31,986 INFO L225 Difference]: With dead ends: 368 [2021-05-22 02:23:31,986 INFO L226 Difference]: Without dead ends: 353 [2021-05-22 02:23:31,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:31,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-22 02:23:31,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 196. [2021-05-22 02:23:31,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-05-22 02:23:31,989 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-05-22 02:23:31,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:31,989 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-05-22 02:23:31,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,989 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-05-22 02:23:31,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:31,990 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:31,990 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:31,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-22 02:23:31,990 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:31,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:31,990 INFO L82 PathProgramCache]: Analyzing trace with hash 81063412, now seen corresponding path program 73 times [2021-05-22 02:23:31,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:31,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019919202] [2021-05-22 02:23:31,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:32,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:32,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019919202] [2021-05-22 02:23:32,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019919202] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:32,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:32,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:32,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60324064] [2021-05-22 02:23:32,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:32,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:32,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:32,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:32,023 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:32,123 INFO L93 Difference]: Finished difference Result 445 states and 1229 transitions. [2021-05-22 02:23:32,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:32,123 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:32,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:32,124 INFO L225 Difference]: With dead ends: 445 [2021-05-22 02:23:32,124 INFO L226 Difference]: Without dead ends: 430 [2021-05-22 02:23:32,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:32,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-05-22 02:23:32,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 199. [2021-05-22 02:23:32,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-05-22 02:23:32,127 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-05-22 02:23:32,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:32,127 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-05-22 02:23:32,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,127 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-05-22 02:23:32,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:32,127 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:32,128 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:32,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-22 02:23:32,128 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:32,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:32,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1137571948, now seen corresponding path program 74 times [2021-05-22 02:23:32,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:32,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964499318] [2021-05-22 02:23:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:32,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:32,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964499318] [2021-05-22 02:23:32,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964499318] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:32,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:32,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:32,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36758487] [2021-05-22 02:23:32,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:32,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:32,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:32,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:32,158 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:32,249 INFO L93 Difference]: Finished difference Result 443 states and 1222 transitions. [2021-05-22 02:23:32,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:32,250 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:32,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:32,250 INFO L225 Difference]: With dead ends: 443 [2021-05-22 02:23:32,250 INFO L226 Difference]: Without dead ends: 428 [2021-05-22 02:23:32,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:32,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-05-22 02:23:32,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 197. [2021-05-22 02:23:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-05-22 02:23:32,261 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-05-22 02:23:32,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:32,261 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-05-22 02:23:32,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,261 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-05-22 02:23:32,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:32,261 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:32,261 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:32,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-05-22 02:23:32,261 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:32,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:32,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1070123960, now seen corresponding path program 75 times [2021-05-22 02:23:32,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:32,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283986245] [2021-05-22 02:23:32,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:32,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:32,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283986245] [2021-05-22 02:23:32,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283986245] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:32,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:32,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:32,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255341958] [2021-05-22 02:23:32,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:32,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:32,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:32,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:32,291 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:32,379 INFO L93 Difference]: Finished difference Result 437 states and 1201 transitions. [2021-05-22 02:23:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:32,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:32,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:32,380 INFO L225 Difference]: With dead ends: 437 [2021-05-22 02:23:32,380 INFO L226 Difference]: Without dead ends: 422 [2021-05-22 02:23:32,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:32,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-05-22 02:23:32,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 200. [2021-05-22 02:23:32,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.959798994974874) internal successors, (589), 199 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 589 transitions. [2021-05-22 02:23:32,383 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 589 transitions. Word has length 17 [2021-05-22 02:23:32,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:32,383 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 589 transitions. [2021-05-22 02:23:32,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,383 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 589 transitions. [2021-05-22 02:23:32,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:32,383 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:32,383 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:32,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-05-22 02:23:32,383 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:32,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:32,384 INFO L82 PathProgramCache]: Analyzing trace with hash -100065036, now seen corresponding path program 76 times [2021-05-22 02:23:32,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:32,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963190568] [2021-05-22 02:23:32,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:32,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:32,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963190568] [2021-05-22 02:23:32,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963190568] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:32,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:32,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:32,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791545575] [2021-05-22 02:23:32,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:32,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:32,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:32,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:32,414 INFO L87 Difference]: Start difference. First operand 200 states and 589 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:32,510 INFO L93 Difference]: Finished difference Result 421 states and 1178 transitions. [2021-05-22 02:23:32,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:32,510 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:32,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:32,510 INFO L225 Difference]: With dead ends: 421 [2021-05-22 02:23:32,511 INFO L226 Difference]: Without dead ends: 406 [2021-05-22 02:23:32,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:32,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-22 02:23:32,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 197. [2021-05-22 02:23:32,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-05-22 02:23:32,514 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-05-22 02:23:32,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:32,514 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-05-22 02:23:32,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,514 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-05-22 02:23:32,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:32,514 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:32,515 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:32,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-22 02:23:32,515 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:32,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:32,515 INFO L82 PathProgramCache]: Analyzing trace with hash -117002088, now seen corresponding path program 77 times [2021-05-22 02:23:32,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:32,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857115208] [2021-05-22 02:23:32,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:32,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:32,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857115208] [2021-05-22 02:23:32,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857115208] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:32,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:32,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:32,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884983606] [2021-05-22 02:23:32,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:32,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:32,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:32,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:32,545 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:32,618 INFO L93 Difference]: Finished difference Result 405 states and 1129 transitions. [2021-05-22 02:23:32,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:32,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:32,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:32,619 INFO L225 Difference]: With dead ends: 405 [2021-05-22 02:23:32,619 INFO L226 Difference]: Without dead ends: 390 [2021-05-22 02:23:32,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:32,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-05-22 02:23:32,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 199. [2021-05-22 02:23:32,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-05-22 02:23:32,622 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-05-22 02:23:32,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:32,622 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-05-22 02:23:32,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-05-22 02:23:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:32,623 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:32,623 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:32,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-05-22 02:23:32,623 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:32,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:32,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1023281748, now seen corresponding path program 78 times [2021-05-22 02:23:32,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:32,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079035793] [2021-05-22 02:23:32,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:32,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:32,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079035793] [2021-05-22 02:23:32,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079035793] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:32,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:32,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:32,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582944079] [2021-05-22 02:23:32,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:32,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:32,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:32,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:32,663 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:32,745 INFO L93 Difference]: Finished difference Result 384 states and 1091 transitions. [2021-05-22 02:23:32,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:32,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:32,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:32,745 INFO L225 Difference]: With dead ends: 384 [2021-05-22 02:23:32,746 INFO L226 Difference]: Without dead ends: 369 [2021-05-22 02:23:32,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:32,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-22 02:23:32,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 195. [2021-05-22 02:23:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-05-22 02:23:32,748 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-05-22 02:23:32,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:32,748 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-05-22 02:23:32,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,749 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-05-22 02:23:32,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:32,749 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:32,749 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:32,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-05-22 02:23:32,749 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:32,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:32,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1228196736, now seen corresponding path program 79 times [2021-05-22 02:23:32,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:32,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420634728] [2021-05-22 02:23:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:32,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:32,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420634728] [2021-05-22 02:23:32,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420634728] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:32,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:32,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:32,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624325389] [2021-05-22 02:23:32,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:32,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:32,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:32,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:32,782 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:32,884 INFO L93 Difference]: Finished difference Result 425 states and 1163 transitions. [2021-05-22 02:23:32,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:32,885 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:32,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:32,885 INFO L225 Difference]: With dead ends: 425 [2021-05-22 02:23:32,885 INFO L226 Difference]: Without dead ends: 410 [2021-05-22 02:23:32,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:32,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-05-22 02:23:32,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 200. [2021-05-22 02:23:32,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.9396984924623117) internal successors, (585), 199 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-05-22 02:23:32,888 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-05-22 02:23:32,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:32,888 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-05-22 02:23:32,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,889 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-05-22 02:23:32,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:32,889 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:32,889 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:32,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-05-22 02:23:32,889 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:32,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:32,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1848135200, now seen corresponding path program 80 times [2021-05-22 02:23:32,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:32,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985851412] [2021-05-22 02:23:32,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:32,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:32,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985851412] [2021-05-22 02:23:32,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985851412] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:32,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:32,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:32,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218391888] [2021-05-22 02:23:32,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:32,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:32,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:32,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:32,922 INFO L87 Difference]: Start difference. First operand 200 states and 585 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:33,013 INFO L93 Difference]: Finished difference Result 429 states and 1169 transitions. [2021-05-22 02:23:33,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:33,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:33,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:33,014 INFO L225 Difference]: With dead ends: 429 [2021-05-22 02:23:33,014 INFO L226 Difference]: Without dead ends: 414 [2021-05-22 02:23:33,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:33,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-22 02:23:33,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 198. [2021-05-22 02:23:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9238578680203045) internal successors, (576), 197 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-05-22 02:23:33,018 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-05-22 02:23:33,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:33,018 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-05-22 02:23:33,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,018 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-05-22 02:23:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:33,018 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:33,018 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:33,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-05-22 02:23:33,018 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:33,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:33,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1371120940, now seen corresponding path program 81 times [2021-05-22 02:23:33,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:33,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839228986] [2021-05-22 02:23:33,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:33,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:33,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839228986] [2021-05-22 02:23:33,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839228986] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:33,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:33,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:33,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31271077] [2021-05-22 02:23:33,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:33,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:33,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:33,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:33,055 INFO L87 Difference]: Start difference. First operand 198 states and 576 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:33,134 INFO L93 Difference]: Finished difference Result 429 states and 1163 transitions. [2021-05-22 02:23:33,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:33,134 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:33,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:33,135 INFO L225 Difference]: With dead ends: 429 [2021-05-22 02:23:33,135 INFO L226 Difference]: Without dead ends: 414 [2021-05-22 02:23:33,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:33,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-22 02:23:33,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 196. [2021-05-22 02:23:33,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-05-22 02:23:33,138 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-05-22 02:23:33,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:33,138 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-05-22 02:23:33,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,138 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-05-22 02:23:33,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:33,139 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:33,139 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:33,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-05-22 02:23:33,139 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:33,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:33,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1608879492, now seen corresponding path program 82 times [2021-05-22 02:23:33,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:33,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323144844] [2021-05-22 02:23:33,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:33,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:33,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323144844] [2021-05-22 02:23:33,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323144844] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:33,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:33,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:33,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479838913] [2021-05-22 02:23:33,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:33,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:33,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:33,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:33,171 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:33,255 INFO L93 Difference]: Finished difference Result 451 states and 1224 transitions. [2021-05-22 02:23:33,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:33,255 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:33,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:33,256 INFO L225 Difference]: With dead ends: 451 [2021-05-22 02:23:33,256 INFO L226 Difference]: Without dead ends: 436 [2021-05-22 02:23:33,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:33,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-05-22 02:23:33,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 199. [2021-05-22 02:23:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-05-22 02:23:33,259 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-05-22 02:23:33,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:33,259 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-05-22 02:23:33,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,259 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-05-22 02:23:33,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:33,260 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:33,260 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:33,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-05-22 02:23:33,262 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:33,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:33,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1467452444, now seen corresponding path program 83 times [2021-05-22 02:23:33,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:33,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932143937] [2021-05-22 02:23:33,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:33,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:33,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932143937] [2021-05-22 02:23:33,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932143937] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:33,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:33,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:33,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483505562] [2021-05-22 02:23:33,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:33,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:33,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:33,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:33,291 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:33,389 INFO L93 Difference]: Finished difference Result 455 states and 1230 transitions. [2021-05-22 02:23:33,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:33,390 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:33,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:33,390 INFO L225 Difference]: With dead ends: 455 [2021-05-22 02:23:33,390 INFO L226 Difference]: Without dead ends: 440 [2021-05-22 02:23:33,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:33,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-05-22 02:23:33,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 197. [2021-05-22 02:23:33,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-05-22 02:23:33,394 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-05-22 02:23:33,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:33,394 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-05-22 02:23:33,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,394 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-05-22 02:23:33,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:33,394 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:33,394 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:33,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-05-22 02:23:33,395 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:33,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:33,395 INFO L82 PathProgramCache]: Analyzing trace with hash -619818944, now seen corresponding path program 84 times [2021-05-22 02:23:33,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:33,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963028334] [2021-05-22 02:23:33,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:33,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:33,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963028334] [2021-05-22 02:23:33,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963028334] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:33,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:33,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:33,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399245905] [2021-05-22 02:23:33,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:33,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:33,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:33,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:33,465 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:33,538 INFO L93 Difference]: Finished difference Result 422 states and 1158 transitions. [2021-05-22 02:23:33,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:33,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:33,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:33,539 INFO L225 Difference]: With dead ends: 422 [2021-05-22 02:23:33,539 INFO L226 Difference]: Without dead ends: 407 [2021-05-22 02:23:33,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-05-22 02:23:33,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 200. [2021-05-22 02:23:33,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.959798994974874) internal successors, (589), 199 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 589 transitions. [2021-05-22 02:23:33,543 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 589 transitions. Word has length 17 [2021-05-22 02:23:33,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:33,543 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 589 transitions. [2021-05-22 02:23:33,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,543 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 589 transitions. [2021-05-22 02:23:33,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:33,543 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:33,543 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:33,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-05-22 02:23:33,543 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:33,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:33,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1790007940, now seen corresponding path program 85 times [2021-05-22 02:23:33,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:33,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810143620] [2021-05-22 02:23:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:33,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:33,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810143620] [2021-05-22 02:23:33,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810143620] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:33,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:33,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:33,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966290174] [2021-05-22 02:23:33,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:33,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:33,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:33,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:33,594 INFO L87 Difference]: Start difference. First operand 200 states and 589 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:33,670 INFO L93 Difference]: Finished difference Result 406 states and 1135 transitions. [2021-05-22 02:23:33,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:33,670 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:33,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:33,671 INFO L225 Difference]: With dead ends: 406 [2021-05-22 02:23:33,671 INFO L226 Difference]: Without dead ends: 391 [2021-05-22 02:23:33,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:33,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-05-22 02:23:33,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 197. [2021-05-22 02:23:33,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-05-22 02:23:33,674 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-05-22 02:23:33,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:33,674 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-05-22 02:23:33,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,674 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-05-22 02:23:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:33,674 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:33,674 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:33,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-05-22 02:23:33,675 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:33,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1806944992, now seen corresponding path program 86 times [2021-05-22 02:23:33,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:33,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720680077] [2021-05-22 02:23:33,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:33,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:33,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720680077] [2021-05-22 02:23:33,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720680077] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:33,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:33,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:33,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554787688] [2021-05-22 02:23:33,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:33,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:33,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:33,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:33,706 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:33,787 INFO L93 Difference]: Finished difference Result 440 states and 1205 transitions. [2021-05-22 02:23:33,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:33,787 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:33,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:33,788 INFO L225 Difference]: With dead ends: 440 [2021-05-22 02:23:33,788 INFO L226 Difference]: Without dead ends: 425 [2021-05-22 02:23:33,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:33,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-05-22 02:23:33,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 199. [2021-05-22 02:23:33,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-05-22 02:23:33,791 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-05-22 02:23:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:33,791 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-05-22 02:23:33,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,791 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-05-22 02:23:33,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:33,792 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:33,792 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:33,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-05-22 02:23:33,792 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:33,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:33,792 INFO L82 PathProgramCache]: Analyzing trace with hash -666661156, now seen corresponding path program 87 times [2021-05-22 02:23:33,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:33,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462055208] [2021-05-22 02:23:33,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:33,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:33,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462055208] [2021-05-22 02:23:33,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462055208] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:33,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:33,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:33,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634625231] [2021-05-22 02:23:33,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:33,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:33,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:33,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:33,824 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:33,902 INFO L93 Difference]: Finished difference Result 419 states and 1167 transitions. [2021-05-22 02:23:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:33,902 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:33,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:33,902 INFO L225 Difference]: With dead ends: 419 [2021-05-22 02:23:33,902 INFO L226 Difference]: Without dead ends: 404 [2021-05-22 02:23:33,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:33,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-22 02:23:33,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 196. [2021-05-22 02:23:33,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-05-22 02:23:33,906 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-05-22 02:23:33,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:33,906 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-05-22 02:23:33,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,906 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-05-22 02:23:33,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:33,906 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:33,906 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:33,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-05-22 02:23:33,906 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:33,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:33,906 INFO L82 PathProgramCache]: Analyzing trace with hash 201773648, now seen corresponding path program 88 times [2021-05-22 02:23:33,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:33,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564666216] [2021-05-22 02:23:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:33,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:33,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564666216] [2021-05-22 02:23:33,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564666216] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:33,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:33,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:33,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718769587] [2021-05-22 02:23:33,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:33,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:33,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:33,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:33,933 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:33,997 INFO L93 Difference]: Finished difference Result 382 states and 1052 transitions. [2021-05-22 02:23:33,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:33,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:33,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:33,998 INFO L225 Difference]: With dead ends: 382 [2021-05-22 02:23:33,998 INFO L226 Difference]: Without dead ends: 367 [2021-05-22 02:23:33,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:33,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-22 02:23:34,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 198. [2021-05-22 02:23:34,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9238578680203045) internal successors, (576), 197 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-05-22 02:23:34,001 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-05-22 02:23:34,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:34,001 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-05-22 02:23:34,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:34,001 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-05-22 02:23:34,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:34,003 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:34,003 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:34,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-05-22 02:23:34,003 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:34,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:34,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1159324884, now seen corresponding path program 89 times [2021-05-22 02:23:34,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:34,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856354113] [2021-05-22 02:23:34,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:34,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:34,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856354113] [2021-05-22 02:23:34,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856354113] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:34,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:34,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:34,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734267994] [2021-05-22 02:23:34,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:34,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:34,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:34,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:34,032 INFO L87 Difference]: Start difference. First operand 198 states and 576 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:34,129 INFO L93 Difference]: Finished difference Result 383 states and 1063 transitions. [2021-05-22 02:23:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:34,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:34,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:34,130 INFO L225 Difference]: With dead ends: 383 [2021-05-22 02:23:34,130 INFO L226 Difference]: Without dead ends: 368 [2021-05-22 02:23:34,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-05-22 02:23:34,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 200. [2021-05-22 02:23:34,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.9396984924623117) internal successors, (585), 199 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-05-22 02:23:34,133 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-05-22 02:23:34,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:34,133 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-05-22 02:23:34,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:34,133 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-05-22 02:23:34,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:34,133 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:34,133 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:34,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-05-22 02:23:34,133 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:34,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:34,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1995358576, now seen corresponding path program 90 times [2021-05-22 02:23:34,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:34,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071160561] [2021-05-22 02:23:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:34,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:34,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071160561] [2021-05-22 02:23:34,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071160561] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:34,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:34,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:34,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703738885] [2021-05-22 02:23:34,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:34,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:34,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:34,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:34,165 INFO L87 Difference]: Start difference. First operand 200 states and 585 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:34,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:34,258 INFO L93 Difference]: Finished difference Result 362 states and 1025 transitions. [2021-05-22 02:23:34,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:34,258 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:34,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:34,259 INFO L225 Difference]: With dead ends: 362 [2021-05-22 02:23:34,259 INFO L226 Difference]: Without dead ends: 347 [2021-05-22 02:23:34,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:34,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-22 02:23:34,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 195. [2021-05-22 02:23:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:34,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-05-22 02:23:34,261 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-05-22 02:23:34,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:34,261 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-05-22 02:23:34,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:34,262 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-05-22 02:23:34,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:34,262 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:34,262 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:34,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-05-22 02:23:34,262 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:34,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:34,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1303103675, now seen corresponding path program 1 times [2021-05-22 02:23:34,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:34,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81537567] [2021-05-22 02:23:34,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:34,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:34,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81537567] [2021-05-22 02:23:34,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81537567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:34,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408196446] [2021-05-22 02:23:34,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:34,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:23:34,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:34,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408196446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:34,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:34,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-22 02:23:34,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932495645] [2021-05-22 02:23:34,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:23:34,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:34,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:23:34,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:34,562 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:34,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:34,720 INFO L93 Difference]: Finished difference Result 363 states and 1031 transitions. [2021-05-22 02:23:34,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:34,720 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:34,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:34,728 INFO L225 Difference]: With dead ends: 363 [2021-05-22 02:23:34,728 INFO L226 Difference]: Without dead ends: 344 [2021-05-22 02:23:34,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:23:34,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-22 02:23:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 208. [2021-05-22 02:23:34,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9613526570048307) internal successors, (613), 207 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:34,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-05-22 02:23:34,734 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 18 [2021-05-22 02:23:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:34,734 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-05-22 02:23:34,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-05-22 02:23:34,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:34,735 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:34,735 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:34,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-05-22 02:23:34,936 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:34,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:34,936 INFO L82 PathProgramCache]: Analyzing trace with hash -95550603, now seen corresponding path program 2 times [2021-05-22 02:23:34,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:34,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740284539] [2021-05-22 02:23:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:34,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:34,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740284539] [2021-05-22 02:23:34,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740284539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:34,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157709463] [2021-05-22 02:23:34,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:35,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:35,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:35,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:23:35,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:35,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157709463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:35,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:35,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-22 02:23:35,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139104510] [2021-05-22 02:23:35,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:23:35,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:35,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:23:35,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:35,052 INFO L87 Difference]: Start difference. First operand 208 states and 613 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:35,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:35,096 INFO L93 Difference]: Finished difference Result 354 states and 1020 transitions. [2021-05-22 02:23:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:35,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:35,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:35,097 INFO L225 Difference]: With dead ends: 354 [2021-05-22 02:23:35,098 INFO L226 Difference]: Without dead ends: 319 [2021-05-22 02:23:35,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:23:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-05-22 02:23:35,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 216. [2021-05-22 02:23:35,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.9813953488372094) internal successors, (641), 215 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:35,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 641 transitions. [2021-05-22 02:23:35,101 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 641 transitions. Word has length 18 [2021-05-22 02:23:35,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:35,102 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 641 transitions. [2021-05-22 02:23:35,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:35,102 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 641 transitions. [2021-05-22 02:23:35,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:35,102 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:35,102 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:35,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-22 02:23:35,319 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:35,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:35,319 INFO L82 PathProgramCache]: Analyzing trace with hash -725187835, now seen corresponding path program 1 times [2021-05-22 02:23:35,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:35,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458081685] [2021-05-22 02:23:35,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:35,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:35,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458081685] [2021-05-22 02:23:35,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458081685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:35,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740424947] [2021-05-22 02:23:35,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:35,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:23:35,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:35,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740424947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:35,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:35,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-22 02:23:35,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413198864] [2021-05-22 02:23:35,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:23:35,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:35,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:23:35,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:35,496 INFO L87 Difference]: Start difference. First operand 216 states and 641 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:35,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:35,693 INFO L93 Difference]: Finished difference Result 382 states and 1057 transitions. [2021-05-22 02:23:35,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:35,693 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:35,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:35,694 INFO L225 Difference]: With dead ends: 382 [2021-05-22 02:23:35,694 INFO L226 Difference]: Without dead ends: 342 [2021-05-22 02:23:35,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:23:35,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-05-22 02:23:35,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 221. [2021-05-22 02:23:35,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.9727272727272727) internal successors, (654), 220 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:35,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 654 transitions. [2021-05-22 02:23:35,697 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 654 transitions. Word has length 18 [2021-05-22 02:23:35,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:35,697 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 654 transitions. [2021-05-22 02:23:35,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 654 transitions. [2021-05-22 02:23:35,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:35,698 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:35,698 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:35,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-05-22 02:23:35,915 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:35,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:35,915 INFO L82 PathProgramCache]: Analyzing trace with hash -809235458, now seen corresponding path program 1 times [2021-05-22 02:23:35,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:35,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531340438] [2021-05-22 02:23:35,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:35,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:35,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531340438] [2021-05-22 02:23:35,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531340438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:35,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834278613] [2021-05-22 02:23:35,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:36,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:23:36,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:36,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834278613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:36,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:36,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-05-22 02:23:36,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439673679] [2021-05-22 02:23:36,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:23:36,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:36,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:23:36,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:23:36,065 INFO L87 Difference]: Start difference. First operand 221 states and 654 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:36,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:36,165 INFO L93 Difference]: Finished difference Result 389 states and 1088 transitions. [2021-05-22 02:23:36,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:36,165 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:36,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:36,166 INFO L225 Difference]: With dead ends: 389 [2021-05-22 02:23:36,166 INFO L226 Difference]: Without dead ends: 330 [2021-05-22 02:23:36,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:36,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-05-22 02:23:36,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 239. [2021-05-22 02:23:36,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.936974789915966) internal successors, (699), 238 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:36,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 699 transitions. [2021-05-22 02:23:36,170 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 699 transitions. Word has length 18 [2021-05-22 02:23:36,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:36,170 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 699 transitions. [2021-05-22 02:23:36,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:36,170 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 699 transitions. [2021-05-22 02:23:36,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:36,170 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:36,170 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:36,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:36,389 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:36,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:36,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1122105489, now seen corresponding path program 2 times [2021-05-22 02:23:36,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:36,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735176438] [2021-05-22 02:23:36,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:36,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:36,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735176438] [2021-05-22 02:23:36,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735176438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:36,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250649976] [2021-05-22 02:23:36,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:36,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:36,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:36,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:23:36,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:36,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250649976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:36,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:36,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-05-22 02:23:36,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382706592] [2021-05-22 02:23:36,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:23:36,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:36,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:23:36,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:36,557 INFO L87 Difference]: Start difference. First operand 239 states and 699 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:36,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:36,916 INFO L93 Difference]: Finished difference Result 711 states and 1983 transitions. [2021-05-22 02:23:36,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:23:36,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:36,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:36,917 INFO L225 Difference]: With dead ends: 711 [2021-05-22 02:23:36,917 INFO L226 Difference]: Without dead ends: 612 [2021-05-22 02:23:36,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 246.0ms TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:23:36,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-05-22 02:23:36,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 271. [2021-05-22 02:23:36,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.0555555555555554) internal successors, (825), 270 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:36,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 825 transitions. [2021-05-22 02:23:36,938 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 825 transitions. Word has length 18 [2021-05-22 02:23:36,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:36,938 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 825 transitions. [2021-05-22 02:23:36,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:36,938 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 825 transitions. [2021-05-22 02:23:36,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:36,939 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:36,939 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:37,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-22 02:23:37,158 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:37,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:37,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1300893727, now seen corresponding path program 3 times [2021-05-22 02:23:37,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:37,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183273220] [2021-05-22 02:23:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:37,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:37,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183273220] [2021-05-22 02:23:37,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183273220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:37,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835425715] [2021-05-22 02:23:37,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:37,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:23:37,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:37,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:23:37,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:37,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835425715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:37,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:37,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-05-22 02:23:37,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233822322] [2021-05-22 02:23:37,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:37,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:37,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:37,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:37,340 INFO L87 Difference]: Start difference. First operand 271 states and 825 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:37,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:37,742 INFO L93 Difference]: Finished difference Result 703 states and 1933 transitions. [2021-05-22 02:23:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:23:37,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:37,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:37,743 INFO L225 Difference]: With dead ends: 703 [2021-05-22 02:23:37,743 INFO L226 Difference]: Without dead ends: 610 [2021-05-22 02:23:37,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:23:37,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-05-22 02:23:37,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 273. [2021-05-22 02:23:37,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.0183823529411766) internal successors, (821), 272 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:37,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 821 transitions. [2021-05-22 02:23:37,748 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 821 transitions. Word has length 18 [2021-05-22 02:23:37,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:37,749 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 821 transitions. [2021-05-22 02:23:37,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:37,749 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 821 transitions. [2021-05-22 02:23:37,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:37,749 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:37,749 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:37,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:37,970 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:37,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:37,970 INFO L82 PathProgramCache]: Analyzing trace with hash -505958907, now seen corresponding path program 4 times [2021-05-22 02:23:37,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:37,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124209491] [2021-05-22 02:23:37,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:38,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:38,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124209491] [2021-05-22 02:23:38,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124209491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:38,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211803690] [2021-05-22 02:23:38,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:38,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:38,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:38,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:23:38,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:38,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211803690] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:38,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:38,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-22 02:23:38,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205687893] [2021-05-22 02:23:38,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:23:38,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:38,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:23:38,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:23:38,132 INFO L87 Difference]: Start difference. First operand 273 states and 821 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:38,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:38,285 INFO L93 Difference]: Finished difference Result 491 states and 1371 transitions. [2021-05-22 02:23:38,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:38,285 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:38,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:38,286 INFO L225 Difference]: With dead ends: 491 [2021-05-22 02:23:38,286 INFO L226 Difference]: Without dead ends: 451 [2021-05-22 02:23:38,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:23:38,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-05-22 02:23:38,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 276. [2021-05-22 02:23:38,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0036363636363634) internal successors, (826), 275 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:38,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 826 transitions. [2021-05-22 02:23:38,290 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 826 transitions. Word has length 18 [2021-05-22 02:23:38,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:38,290 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 826 transitions. [2021-05-22 02:23:38,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:38,290 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 826 transitions. [2021-05-22 02:23:38,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:38,291 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:38,291 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:38,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-22 02:23:38,507 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:38,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:38,507 INFO L82 PathProgramCache]: Analyzing trace with hash -534360167, now seen corresponding path program 5 times [2021-05-22 02:23:38,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:38,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848679899] [2021-05-22 02:23:38,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:38,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:38,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848679899] [2021-05-22 02:23:38,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848679899] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:38,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936395467] [2021-05-22 02:23:38,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:38,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:38,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:38,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:23:38,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:38,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936395467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:38,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:38,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-22 02:23:38,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924719199] [2021-05-22 02:23:38,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:23:38,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:38,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:23:38,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:23:38,723 INFO L87 Difference]: Start difference. First operand 276 states and 826 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:38,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:38,890 INFO L93 Difference]: Finished difference Result 462 states and 1278 transitions. [2021-05-22 02:23:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:38,891 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:38,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:38,891 INFO L225 Difference]: With dead ends: 462 [2021-05-22 02:23:38,892 INFO L226 Difference]: Without dead ends: 431 [2021-05-22 02:23:38,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:23:38,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-05-22 02:23:38,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 279. [2021-05-22 02:23:38,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.9892086330935252) internal successors, (831), 278 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:38,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 831 transitions. [2021-05-22 02:23:38,896 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 831 transitions. Word has length 18 [2021-05-22 02:23:38,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:38,896 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 831 transitions. [2021-05-22 02:23:38,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:38,896 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 831 transitions. [2021-05-22 02:23:38,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:38,896 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:38,897 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:39,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-05-22 02:23:39,105 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:39,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:39,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1888639049, now seen corresponding path program 6 times [2021-05-22 02:23:39,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:39,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829753070] [2021-05-22 02:23:39,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:39,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:39,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829753070] [2021-05-22 02:23:39,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829753070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:39,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857358255] [2021-05-22 02:23:39,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:23:39,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:23:39,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:39,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:23:39,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:39,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857358255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:39,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:39,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-05-22 02:23:39,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531983765] [2021-05-22 02:23:39,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:39,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:39,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:39,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:39,279 INFO L87 Difference]: Start difference. First operand 279 states and 831 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:39,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:39,693 INFO L93 Difference]: Finished difference Result 579 states and 1609 transitions. [2021-05-22 02:23:39,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:23:39,693 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:39,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:39,694 INFO L225 Difference]: With dead ends: 579 [2021-05-22 02:23:39,694 INFO L226 Difference]: Without dead ends: 481 [2021-05-22 02:23:39,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:23:39,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-05-22 02:23:39,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 277. [2021-05-22 02:23:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.0543478260869565) internal successors, (843), 276 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:39,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 843 transitions. [2021-05-22 02:23:39,699 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 843 transitions. Word has length 18 [2021-05-22 02:23:39,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:39,699 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 843 transitions. [2021-05-22 02:23:39,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:39,699 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 843 transitions. [2021-05-22 02:23:39,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:39,699 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:39,699 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:39,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:39,910 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:39,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:39,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1338392489, now seen corresponding path program 7 times [2021-05-22 02:23:39,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:39,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262602461] [2021-05-22 02:23:39,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:39,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:39,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262602461] [2021-05-22 02:23:39,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262602461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:39,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825470931] [2021-05-22 02:23:39,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:39,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:23:39,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:40,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825470931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:40,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:40,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:23:40,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154041368] [2021-05-22 02:23:40,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:40,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:40,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:40,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:40,063 INFO L87 Difference]: Start difference. First operand 277 states and 843 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:40,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:40,224 INFO L93 Difference]: Finished difference Result 557 states and 1551 transitions. [2021-05-22 02:23:40,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:40,224 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:40,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:40,229 INFO L225 Difference]: With dead ends: 557 [2021-05-22 02:23:40,229 INFO L226 Difference]: Without dead ends: 517 [2021-05-22 02:23:40,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:40,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-05-22 02:23:40,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 284. [2021-05-22 02:23:40,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.060070671378092) internal successors, (866), 283 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:40,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 866 transitions. [2021-05-22 02:23:40,234 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 866 transitions. Word has length 18 [2021-05-22 02:23:40,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:40,234 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 866 transitions. [2021-05-22 02:23:40,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:40,234 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 866 transitions. [2021-05-22 02:23:40,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:40,235 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:40,235 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:40,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-22 02:23:40,449 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:40,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:40,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1254344866, now seen corresponding path program 2 times [2021-05-22 02:23:40,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:40,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059732306] [2021-05-22 02:23:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:40,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:40,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059732306] [2021-05-22 02:23:40,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059732306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:40,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794354423] [2021-05-22 02:23:40,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:40,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:40,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:40,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:23:40,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:40,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794354423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:40,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:40,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-05-22 02:23:40,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318782595] [2021-05-22 02:23:40,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:23:40,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:40,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:23:40,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:23:40,584 INFO L87 Difference]: Start difference. First operand 284 states and 866 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:40,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:40,668 INFO L93 Difference]: Finished difference Result 566 states and 1626 transitions. [2021-05-22 02:23:40,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:40,668 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:40,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:40,669 INFO L225 Difference]: With dead ends: 566 [2021-05-22 02:23:40,669 INFO L226 Difference]: Without dead ends: 505 [2021-05-22 02:23:40,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:40,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-05-22 02:23:40,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 300. [2021-05-22 02:23:40,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.120401337792642) internal successors, (933), 299 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:40,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 933 transitions. [2021-05-22 02:23:40,674 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 933 transitions. Word has length 18 [2021-05-22 02:23:40,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:40,674 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 933 transitions. [2021-05-22 02:23:40,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:40,674 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 933 transitions. [2021-05-22 02:23:40,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:40,674 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:40,674 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:40,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-05-22 02:23:40,889 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:40,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:40,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2042464585, now seen corresponding path program 8 times [2021-05-22 02:23:40,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:40,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751374290] [2021-05-22 02:23:40,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:40,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:40,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751374290] [2021-05-22 02:23:40,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751374290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:40,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214696298] [2021-05-22 02:23:40,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:40,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:40,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:40,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:23:40,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:40,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214696298] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:40,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:40,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-22 02:23:40,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511454826] [2021-05-22 02:23:40,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:40,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:40,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:40,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:40,996 INFO L87 Difference]: Start difference. First operand 300 states and 933 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:41,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:41,078 INFO L93 Difference]: Finished difference Result 439 states and 1262 transitions. [2021-05-22 02:23:41,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:41,079 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:41,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:41,079 INFO L225 Difference]: With dead ends: 439 [2021-05-22 02:23:41,079 INFO L226 Difference]: Without dead ends: 381 [2021-05-22 02:23:41,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-05-22 02:23:41,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 296. [2021-05-22 02:23:41,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.0406779661016947) internal successors, (897), 295 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 897 transitions. [2021-05-22 02:23:41,083 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 897 transitions. Word has length 18 [2021-05-22 02:23:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:41,083 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 897 transitions. [2021-05-22 02:23:41,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 897 transitions. [2021-05-22 02:23:41,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:41,084 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:41,084 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:41,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:41,301 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:41,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:41,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1866597709, now seen corresponding path program 3 times [2021-05-22 02:23:41,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:41,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513843996] [2021-05-22 02:23:41,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:41,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:41,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513843996] [2021-05-22 02:23:41,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513843996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:41,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798029063] [2021-05-22 02:23:41,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:41,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:23:41,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:41,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:23:41,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:41,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798029063] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:41,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:41,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-05-22 02:23:41,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654843826] [2021-05-22 02:23:41,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:23:41,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:41,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:23:41,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:41,470 INFO L87 Difference]: Start difference. First operand 296 states and 897 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:41,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:41,732 INFO L93 Difference]: Finished difference Result 627 states and 1772 transitions. [2021-05-22 02:23:41,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:23:41,733 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:41,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:41,733 INFO L225 Difference]: With dead ends: 627 [2021-05-22 02:23:41,734 INFO L226 Difference]: Without dead ends: 553 [2021-05-22 02:23:41,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:23:41,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-05-22 02:23:41,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 326. [2021-05-22 02:23:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.076923076923077) internal successors, (1000), 325 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:41,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1000 transitions. [2021-05-22 02:23:41,738 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1000 transitions. Word has length 18 [2021-05-22 02:23:41,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:41,738 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 1000 transitions. [2021-05-22 02:23:41,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:41,738 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1000 transitions. [2021-05-22 02:23:41,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:41,739 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:41,739 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:41,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-05-22 02:23:41,955 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:41,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:41,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1213009967, now seen corresponding path program 4 times [2021-05-22 02:23:41,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:41,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594995394] [2021-05-22 02:23:41,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:41,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:41,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594995394] [2021-05-22 02:23:41,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594995394] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:41,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544946152] [2021-05-22 02:23:41,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:23:42,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:42,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:42,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:23:42,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:42,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:42,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544946152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:42,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:42,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-22 02:23:42,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017231413] [2021-05-22 02:23:42,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:23:42,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:42,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:23:42,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:42,120 INFO L87 Difference]: Start difference. First operand 326 states and 1000 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:42,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:42,250 INFO L93 Difference]: Finished difference Result 453 states and 1320 transitions. [2021-05-22 02:23:42,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:42,250 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:42,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:42,251 INFO L225 Difference]: With dead ends: 453 [2021-05-22 02:23:42,251 INFO L226 Difference]: Without dead ends: 419 [2021-05-22 02:23:42,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:23:42,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-05-22 02:23:42,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 326. [2021-05-22 02:23:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.0707692307692307) internal successors, (998), 325 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:42,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 998 transitions. [2021-05-22 02:23:42,255 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 998 transitions. Word has length 18 [2021-05-22 02:23:42,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:42,255 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 998 transitions. [2021-05-22 02:23:42,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:42,255 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 998 transitions. [2021-05-22 02:23:42,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:42,256 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:42,256 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:42,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:42,456 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:42,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:42,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1861527460, now seen corresponding path program 3 times [2021-05-22 02:23:42,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:42,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660580405] [2021-05-22 02:23:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:42,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:42,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660580405] [2021-05-22 02:23:42,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660580405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:42,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168268509] [2021-05-22 02:23:42,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:42,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:23:42,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:42,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:23:42,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:42,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:42,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168268509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:42,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:42,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-05-22 02:23:42,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382639271] [2021-05-22 02:23:42,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:42,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:42,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:42,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:42,627 INFO L87 Difference]: Start difference. First operand 326 states and 998 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:42,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:42,755 INFO L93 Difference]: Finished difference Result 528 states and 1512 transitions. [2021-05-22 02:23:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:23:42,755 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:42,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:42,755 INFO L225 Difference]: With dead ends: 528 [2021-05-22 02:23:42,756 INFO L226 Difference]: Without dead ends: 440 [2021-05-22 02:23:42,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:42,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-05-22 02:23:42,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 320. [2021-05-22 02:23:42,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.0564263322884013) internal successors, (975), 319 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 975 transitions. [2021-05-22 02:23:42,760 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 975 transitions. Word has length 18 [2021-05-22 02:23:42,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:42,760 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 975 transitions. [2021-05-22 02:23:42,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:42,760 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 975 transitions. [2021-05-22 02:23:42,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:42,760 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:42,760 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:42,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:42,976 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:42,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:42,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1726676173, now seen corresponding path program 5 times [2021-05-22 02:23:42,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:42,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361449919] [2021-05-22 02:23:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:43,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:43,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361449919] [2021-05-22 02:23:43,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361449919] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:43,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664518251] [2021-05-22 02:23:43,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:43,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:43,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:43,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:23:43,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:43,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664518251] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:43,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:43,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-05-22 02:23:43,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308703779] [2021-05-22 02:23:43,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:23:43,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:43,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:23:43,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:23:43,096 INFO L87 Difference]: Start difference. First operand 320 states and 975 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:43,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:43,161 INFO L93 Difference]: Finished difference Result 455 states and 1343 transitions. [2021-05-22 02:23:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:43,161 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:43,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:43,162 INFO L225 Difference]: With dead ends: 455 [2021-05-22 02:23:43,162 INFO L226 Difference]: Without dead ends: 405 [2021-05-22 02:23:43,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:43,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-22 02:23:43,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 307. [2021-05-22 02:23:43,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.0326797385620914) internal successors, (928), 306 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:43,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 928 transitions. [2021-05-22 02:23:43,166 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 928 transitions. Word has length 18 [2021-05-22 02:23:43,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:43,166 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 928 transitions. [2021-05-22 02:23:43,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:43,166 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 928 transitions. [2021-05-22 02:23:43,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:43,166 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:43,166 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:43,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:43,367 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:43,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:43,367 INFO L82 PathProgramCache]: Analyzing trace with hash -253324305, now seen corresponding path program 9 times [2021-05-22 02:23:43,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:43,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926035675] [2021-05-22 02:23:43,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:43,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:43,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926035675] [2021-05-22 02:23:43,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926035675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:43,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106888654] [2021-05-22 02:23:43,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:43,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:23:43,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:43,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:23:43,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:43,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106888654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:43,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:43,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-05-22 02:23:43,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242978508] [2021-05-22 02:23:43,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:43,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:43,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:43,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:43,538 INFO L87 Difference]: Start difference. First operand 307 states and 928 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:43,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:43,831 INFO L93 Difference]: Finished difference Result 718 states and 2053 transitions. [2021-05-22 02:23:43,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:23:43,831 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:43,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:43,832 INFO L225 Difference]: With dead ends: 718 [2021-05-22 02:23:43,832 INFO L226 Difference]: Without dead ends: 592 [2021-05-22 02:23:43,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:23:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-05-22 02:23:43,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 310. [2021-05-22 02:23:43,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.0226537216828477) internal successors, (934), 309 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 934 transitions. [2021-05-22 02:23:43,837 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 934 transitions. Word has length 18 [2021-05-22 02:23:43,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:43,837 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 934 transitions. [2021-05-22 02:23:43,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:43,837 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 934 transitions. [2021-05-22 02:23:43,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:43,837 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:43,837 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:44,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:44,053 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:44,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:44,053 INFO L82 PathProgramCache]: Analyzing trace with hash -603750765, now seen corresponding path program 10 times [2021-05-22 02:23:44,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:44,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422169282] [2021-05-22 02:23:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:44,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:44,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422169282] [2021-05-22 02:23:44,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422169282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:44,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418973871] [2021-05-22 02:23:44,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:44,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:44,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:44,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:23:44,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:44,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418973871] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:44,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:44,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-22 02:23:44,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375470511] [2021-05-22 02:23:44,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:23:44,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:44,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:23:44,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:23:44,216 INFO L87 Difference]: Start difference. First operand 310 states and 934 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:44,378 INFO L93 Difference]: Finished difference Result 549 states and 1571 transitions. [2021-05-22 02:23:44,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:44,379 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:44,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:44,379 INFO L225 Difference]: With dead ends: 549 [2021-05-22 02:23:44,379 INFO L226 Difference]: Without dead ends: 512 [2021-05-22 02:23:44,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:23:44,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-05-22 02:23:44,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 310. [2021-05-22 02:23:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.0194174757281553) internal successors, (933), 309 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:44,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 933 transitions. [2021-05-22 02:23:44,384 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 933 transitions. Word has length 18 [2021-05-22 02:23:44,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:44,384 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 933 transitions. [2021-05-22 02:23:44,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:44,384 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 933 transitions. [2021-05-22 02:23:44,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:44,384 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:44,384 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:44,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-05-22 02:23:44,600 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:44,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:44,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1496627073, now seen corresponding path program 11 times [2021-05-22 02:23:44,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:44,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679542501] [2021-05-22 02:23:44,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:44,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:44,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679542501] [2021-05-22 02:23:44,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679542501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:44,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026052892] [2021-05-22 02:23:44,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:44,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:44,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:44,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:23:44,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:44,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026052892] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:44,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:44,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-22 02:23:44,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297041075] [2021-05-22 02:23:44,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:23:44,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:44,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:23:44,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:44,754 INFO L87 Difference]: Start difference. First operand 310 states and 933 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:44,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:44,870 INFO L93 Difference]: Finished difference Result 552 states and 1552 transitions. [2021-05-22 02:23:44,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:44,870 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:44,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:44,871 INFO L225 Difference]: With dead ends: 552 [2021-05-22 02:23:44,871 INFO L226 Difference]: Without dead ends: 521 [2021-05-22 02:23:44,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-05-22 02:23:44,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 313. [2021-05-22 02:23:44,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.0288461538461537) internal successors, (945), 312 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:44,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 945 transitions. [2021-05-22 02:23:44,875 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 945 transitions. Word has length 18 [2021-05-22 02:23:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:44,875 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 945 transitions. [2021-05-22 02:23:44,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:44,876 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 945 transitions. [2021-05-22 02:23:44,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:44,876 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:44,876 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:45,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:45,076 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:45,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:45,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1579704863, now seen corresponding path program 12 times [2021-05-22 02:23:45,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:45,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407482535] [2021-05-22 02:23:45,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:45,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:45,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407482535] [2021-05-22 02:23:45,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407482535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:45,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403933229] [2021-05-22 02:23:45,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:45,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:23:45,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:45,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:23:45,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:45,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403933229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:45,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:45,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-22 02:23:45,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17604513] [2021-05-22 02:23:45,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:45,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:45,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:45,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:45,179 INFO L87 Difference]: Start difference. First operand 313 states and 945 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:45,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:45,221 INFO L93 Difference]: Finished difference Result 451 states and 1311 transitions. [2021-05-22 02:23:45,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:45,221 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:45,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:45,222 INFO L225 Difference]: With dead ends: 451 [2021-05-22 02:23:45,222 INFO L226 Difference]: Without dead ends: 402 [2021-05-22 02:23:45,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:23:45,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-05-22 02:23:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 275. [2021-05-22 02:23:45,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.9708029197080292) internal successors, (814), 274 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:45,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 814 transitions. [2021-05-22 02:23:45,225 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 814 transitions. Word has length 18 [2021-05-22 02:23:45,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:45,225 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 814 transitions. [2021-05-22 02:23:45,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:45,225 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 814 transitions. [2021-05-22 02:23:45,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:45,226 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:45,226 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:45,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-05-22 02:23:45,426 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:45,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:45,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1646468570, now seen corresponding path program 4 times [2021-05-22 02:23:45,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:45,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739917539] [2021-05-22 02:23:45,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:45,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:45,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739917539] [2021-05-22 02:23:45,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739917539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:45,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985514535] [2021-05-22 02:23:45,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:45,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:45,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:45,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:23:45,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:45,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985514535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:45,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:45,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-05-22 02:23:45,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711257087] [2021-05-22 02:23:45,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:23:45,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:45,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:23:45,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:23:45,538 INFO L87 Difference]: Start difference. First operand 275 states and 814 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:45,615 INFO L93 Difference]: Finished difference Result 382 states and 1100 transitions. [2021-05-22 02:23:45,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:45,615 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:45,616 INFO L225 Difference]: With dead ends: 382 [2021-05-22 02:23:45,616 INFO L226 Difference]: Without dead ends: 321 [2021-05-22 02:23:45,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:45,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-22 02:23:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 285. [2021-05-22 02:23:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.943661971830986) internal successors, (836), 284 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:45,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 836 transitions. [2021-05-22 02:23:45,619 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 836 transitions. Word has length 18 [2021-05-22 02:23:45,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:45,620 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 836 transitions. [2021-05-22 02:23:45,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 836 transitions. [2021-05-22 02:23:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:45,620 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:45,620 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:45,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:45,821 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:45,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:45,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1039285976, now seen corresponding path program 5 times [2021-05-22 02:23:45,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:45,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205125798] [2021-05-22 02:23:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:45,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:45,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205125798] [2021-05-22 02:23:45,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205125798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:45,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5223278] [2021-05-22 02:23:45,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:45,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:45,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:45,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:23:45,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:45,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5223278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:45,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:45,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-05-22 02:23:45,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760260342] [2021-05-22 02:23:45,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:23:45,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:45,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:23:45,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:23:45,933 INFO L87 Difference]: Start difference. First operand 285 states and 836 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:45,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:45,989 INFO L93 Difference]: Finished difference Result 392 states and 1114 transitions. [2021-05-22 02:23:45,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:45,990 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:45,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:45,990 INFO L225 Difference]: With dead ends: 392 [2021-05-22 02:23:45,990 INFO L226 Difference]: Without dead ends: 337 [2021-05-22 02:23:45,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-05-22 02:23:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 274. [2021-05-22 02:23:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.93040293040293) internal successors, (800), 273 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:45,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 800 transitions. [2021-05-22 02:23:45,993 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 800 transitions. Word has length 18 [2021-05-22 02:23:45,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:45,993 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 800 transitions. [2021-05-22 02:23:45,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:45,994 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 800 transitions. [2021-05-22 02:23:45,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:45,994 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:45,994 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:46,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:46,209 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:46,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:46,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1633409787, now seen corresponding path program 6 times [2021-05-22 02:23:46,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:46,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348296065] [2021-05-22 02:23:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:46,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:46,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348296065] [2021-05-22 02:23:46,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348296065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:46,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630974135] [2021-05-22 02:23:46,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:46,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:23:46,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:46,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:23:46,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:46,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630974135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:46,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:46,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-05-22 02:23:46,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734247526] [2021-05-22 02:23:46,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:46,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:46,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:46,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:46,366 INFO L87 Difference]: Start difference. First operand 274 states and 800 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:46,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:46,704 INFO L93 Difference]: Finished difference Result 519 states and 1396 transitions. [2021-05-22 02:23:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:23:46,704 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:46,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:46,705 INFO L225 Difference]: With dead ends: 519 [2021-05-22 02:23:46,705 INFO L226 Difference]: Without dead ends: 431 [2021-05-22 02:23:46,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 289.1ms TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:23:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-05-22 02:23:46,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 279. [2021-05-22 02:23:46,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.91726618705036) internal successors, (811), 278 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:46,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 811 transitions. [2021-05-22 02:23:46,709 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 811 transitions. Word has length 18 [2021-05-22 02:23:46,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:46,709 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 811 transitions. [2021-05-22 02:23:46,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:46,709 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 811 transitions. [2021-05-22 02:23:46,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:46,709 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:46,709 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:46,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-05-22 02:23:46,910 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:46,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:46,910 INFO L82 PathProgramCache]: Analyzing trace with hash -675858551, now seen corresponding path program 7 times [2021-05-22 02:23:46,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:46,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203955337] [2021-05-22 02:23:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:46,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:46,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203955337] [2021-05-22 02:23:46,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203955337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:46,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907815979] [2021-05-22 02:23:46,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:46,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:23:46,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:47,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907815979] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:47,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:47,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-22 02:23:47,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736056847] [2021-05-22 02:23:47,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:23:47,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:47,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:23:47,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:47,080 INFO L87 Difference]: Start difference. First operand 279 states and 811 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:47,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:47,253 INFO L93 Difference]: Finished difference Result 371 states and 1004 transitions. [2021-05-22 02:23:47,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:47,254 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:47,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:47,254 INFO L225 Difference]: With dead ends: 371 [2021-05-22 02:23:47,254 INFO L226 Difference]: Without dead ends: 348 [2021-05-22 02:23:47,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:23:47,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-22 02:23:47,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 285. [2021-05-22 02:23:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.9014084507042255) internal successors, (824), 284 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 824 transitions. [2021-05-22 02:23:47,258 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 824 transitions. Word has length 18 [2021-05-22 02:23:47,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:47,258 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 824 transitions. [2021-05-22 02:23:47,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:47,258 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 824 transitions. [2021-05-22 02:23:47,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:47,258 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:47,258 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:47,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:47,459 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:47,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:47,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1891218171, now seen corresponding path program 8 times [2021-05-22 02:23:47,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:47,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593125389] [2021-05-22 02:23:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:47,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:47,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593125389] [2021-05-22 02:23:47,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593125389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:47,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568572829] [2021-05-22 02:23:47,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:47,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:47,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:47,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:23:47,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:47,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568572829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:47,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:47,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-05-22 02:23:47,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728068975] [2021-05-22 02:23:47,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:47,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:47,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:47,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:47,635 INFO L87 Difference]: Start difference. First operand 285 states and 824 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:47,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:47,946 INFO L93 Difference]: Finished difference Result 545 states and 1462 transitions. [2021-05-22 02:23:47,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:23:47,947 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:47,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:47,947 INFO L225 Difference]: With dead ends: 545 [2021-05-22 02:23:47,947 INFO L226 Difference]: Without dead ends: 433 [2021-05-22 02:23:47,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 232.9ms TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:23:47,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-05-22 02:23:47,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 264. [2021-05-22 02:23:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9277566539923954) internal successors, (770), 263 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) [2021-05-22 02:23:47,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 770 transitions. [2021-05-22 02:23:47,951 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 770 transitions. Word has length 18 [2021-05-22 02:23:47,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:47,951 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 770 transitions. [2021-05-22 02:23:47,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:47,951 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 770 transitions. [2021-05-22 02:23:47,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:47,951 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:47,951 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:48,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-05-22 02:23:48,152 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:48,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:48,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1770591994, now seen corresponding path program 6 times [2021-05-22 02:23:48,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:48,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665971204] [2021-05-22 02:23:48,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:48,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:48,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665971204] [2021-05-22 02:23:48,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665971204] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:48,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799564310] [2021-05-22 02:23:48,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:48,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:23:48,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:48,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:23:48,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:48,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799564310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:48,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:48,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-05-22 02:23:48,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544192397] [2021-05-22 02:23:48,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:23:48,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:48,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:23:48,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:48,270 INFO L87 Difference]: Start difference. First operand 264 states and 770 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:48,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:48,392 INFO L93 Difference]: Finished difference Result 379 states and 1054 transitions. [2021-05-22 02:23:48,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:23:48,392 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:48,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:48,393 INFO L225 Difference]: With dead ends: 379 [2021-05-22 02:23:48,393 INFO L226 Difference]: Without dead ends: 285 [2021-05-22 02:23:48,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:23:48,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-05-22 02:23:48,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 208. [2021-05-22 02:23:48,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9082125603864735) internal successors, (602), 207 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:48,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 602 transitions. [2021-05-22 02:23:48,396 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 602 transitions. Word has length 18 [2021-05-22 02:23:48,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:48,396 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 602 transitions. [2021-05-22 02:23:48,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:48,396 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 602 transitions. [2021-05-22 02:23:48,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:48,396 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:48,396 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:48,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-05-22 02:23:48,596 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:48,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:48,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1782534729, now seen corresponding path program 9 times [2021-05-22 02:23:48,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:48,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673324799] [2021-05-22 02:23:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:48,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:48,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673324799] [2021-05-22 02:23:48,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673324799] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:48,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57285511] [2021-05-22 02:23:48,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:48,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:23:48,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:48,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:23:48,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:48,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57285511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:48,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:48,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-05-22 02:23:48,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035432693] [2021-05-22 02:23:48,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:23:48,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:48,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:23:48,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:23:48,721 INFO L87 Difference]: Start difference. First operand 208 states and 602 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:48,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:48,792 INFO L93 Difference]: Finished difference Result 262 states and 743 transitions. [2021-05-22 02:23:48,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:48,792 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:48,793 INFO L225 Difference]: With dead ends: 262 [2021-05-22 02:23:48,793 INFO L226 Difference]: Without dead ends: 215 [2021-05-22 02:23:48,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:48,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-22 02:23:48,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 189. [2021-05-22 02:23:48,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-05-22 02:23:48,795 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 18 [2021-05-22 02:23:48,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:48,795 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-05-22 02:23:48,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-05-22 02:23:48,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:23:48,795 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:48,795 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] [2021-05-22 02:23:49,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-05-22 02:23:49,007 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:49,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:49,008 INFO L82 PathProgramCache]: Analyzing trace with hash 92049292, now seen corresponding path program 1 times [2021-05-22 02:23:49,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:49,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833551527] [2021-05-22 02:23:49,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:49,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:49,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833551527] [2021-05-22 02:23:49,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833551527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:49,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859630307] [2021-05-22 02:23:49,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:49,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:23:49,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:49,277 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-22 02:23:49,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:49,493 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.derSimple(XnfDer.java:308) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate_EqInfoBased(XnfDer.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate(XnfDer.java:101) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:100) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-22 02:23:49,496 INFO L168 Benchmark]: Toolchain (without parser) took 29903.91 ms. Allocated memory was 396.4 MB in the beginning and 633.3 MB in the end (delta: 237.0 MB). Free memory was 375.0 MB in the beginning and 461.8 MB in the end (delta: -86.8 MB). Peak memory consumption was 154.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:23:49,496 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 396.4 MB. Free memory was 376.4 MB in the beginning and 376.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:23:49,496 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.62 ms. Allocated memory is still 396.4 MB. Free memory was 375.0 MB in the beginning and 373.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-05-22 02:23:49,496 INFO L168 Benchmark]: Boogie Preprocessor took 22.92 ms. Allocated memory is still 396.4 MB. Free memory was 373.4 MB in the beginning and 372.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:23:49,496 INFO L168 Benchmark]: RCFGBuilder took 371.10 ms. Allocated memory is still 396.4 MB. Free memory was 372.3 MB in the beginning and 373.5 MB in the end (delta: -1.2 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:23:49,497 INFO L168 Benchmark]: TraceAbstraction took 29474.68 ms. Allocated memory was 396.4 MB in the beginning and 633.3 MB in the end (delta: 237.0 MB). Free memory was 373.5 MB in the beginning and 461.8 MB in the end (delta: -88.3 MB). Peak memory consumption was 149.7 MB. Max. memory is 16.0 GB. [2021-05-22 02:23:49,497 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 396.4 MB. Free memory was 376.4 MB in the beginning and 376.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 31.62 ms. Allocated memory is still 396.4 MB. Free memory was 375.0 MB in the beginning and 373.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 22.92 ms. Allocated memory is still 396.4 MB. Free memory was 373.4 MB in the beginning and 372.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 371.10 ms. Allocated memory is still 396.4 MB. Free memory was 372.3 MB in the beginning and 373.5 MB in the end (delta: -1.2 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 29474.68 ms. Allocated memory was 396.4 MB in the beginning and 633.3 MB in the end (delta: 237.0 MB). Free memory was 373.5 MB in the beginning and 461.8 MB in the end (delta: -88.3 MB). Peak memory consumption was 149.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...