/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/parallel/ticket-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:26:29,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:26:29,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:26:29,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:26:29,693 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 02:26:29,728 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:26:29,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:26:29,728 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:26:29,729 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:26:29,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:26:29,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:26:29,731 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:26:29,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:26:29,731 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:26:29,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:26:29,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:26:29,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:26:29,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:26:29,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:26:29,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:26:29,733 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:26:29,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:26:29,733 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:26:29,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:26:29,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:26:29,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:26:29,734 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:26:29,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:26:29,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:26:29,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:26:29,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:26:29,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:26:29,734 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:26:29,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:26:29,735 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:26:29,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:26:29,735 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:26:29,735 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:26:30,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:26:30,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:26:30,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:26:30,057 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:26:30,058 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:26:30,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-5.wvr.bpl [2021-05-22 02:26:30,059 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-5.wvr.bpl' [2021-05-22 02:26:30,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:26:30,104 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:26:30,106 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:26:30,106 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:26:30,106 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:26:30,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ticket-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:30" (1/1) ... [2021-05-22 02:26:30,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ticket-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:30" (1/1) ... [2021-05-22 02:26:30,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:26:30,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:26:30,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:26:30,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:26:30,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ticket-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:30" (1/1) ... [2021-05-22 02:26:30,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ticket-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:30" (1/1) ... [2021-05-22 02:26:30,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ticket-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:30" (1/1) ... [2021-05-22 02:26:30,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ticket-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:30" (1/1) ... [2021-05-22 02:26:30,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ticket-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:30" (1/1) ... [2021-05-22 02:26:30,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ticket-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:30" (1/1) ... [2021-05-22 02:26:30,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ticket-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:30" (1/1) ... [2021-05-22 02:26:30,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:26:30,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:26:30,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:26:30,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:26:30,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ticket-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:30" (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 02:26:30,229 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:26:30,229 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:26:30,229 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:26:30,230 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:26:30,230 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:26:30,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:26:30,230 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:26:30,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:26:30,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:26:30,232 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:26:30,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:26:30,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:26:30,232 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-22 02:26:30,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-22 02:26:30,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-22 02:26:30,233 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-05-22 02:26:30,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-05-22 02:26:30,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-05-22 02:26:30,234 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 02:26:30,514 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:26:30,514 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:26:30,515 INFO L202 PluginConnector]: Adding new model ticket-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:26:30 BoogieIcfgContainer [2021-05-22 02:26:30,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:26:30,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:26:30,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:26:30,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:26:30,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:30" (1/2) ... [2021-05-22 02:26:30,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad9455 and model type ticket-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:26:30, skipping insertion in model container [2021-05-22 02:26:30,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:26:30" (2/2) ... [2021-05-22 02:26:30,522 INFO L111 eAbstractionObserver]: Analyzing ICFG ticket-5.wvr.bpl [2021-05-22 02:26:30,526 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:26:30,526 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:26:30,526 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:26:30,527 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:26:30,625 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-05-22 02:26:30,642 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:26:30,657 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:26:30,658 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:26:30,658 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:26:30,658 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:26:30,658 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:26:30,658 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:26:30,658 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:26:30,658 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:26:30,667 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 62 places, 46 transitions, 132 flow [2021-05-22 02:26:31,584 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 12446 states, 12444 states have (on average 4.187078109932497) internal successors, (52104), 12445 states have internal predecessors, (52104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:31,629 INFO L276 IsEmpty]: Start isEmpty. Operand has 12446 states, 12444 states have (on average 4.187078109932497) internal successors, (52104), 12445 states have internal predecessors, (52104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:31,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:26:31,786 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:31,787 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:31,788 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:31,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:31,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1270525438, now seen corresponding path program 1 times [2021-05-22 02:26:31,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:31,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135508044] [2021-05-22 02:26:31,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:31,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:31,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135508044] [2021-05-22 02:26:31,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135508044] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:31,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:31,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:26:31,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737586164] [2021-05-22 02:26:31,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:26:31,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:32,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:26:32,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:26:32,030 INFO L87 Difference]: Start difference. First operand has 12446 states, 12444 states have (on average 4.187078109932497) internal successors, (52104), 12445 states have internal predecessors, (52104), 0 states have call successors, (0), 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 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:32,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:32,373 INFO L93 Difference]: Finished difference Result 12865 states and 53759 transitions. [2021-05-22 02:26:32,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:26:32,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:26:32,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:32,596 INFO L225 Difference]: With dead ends: 12865 [2021-05-22 02:26:32,596 INFO L226 Difference]: Without dead ends: 12865 [2021-05-22 02:26:32,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:32,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12865 states. [2021-05-22 02:26:33,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12865 to 12865. [2021-05-22 02:26:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12865 states, 12864 states have (on average 4.179026741293533) internal successors, (53759), 12864 states have internal predecessors, (53759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:33,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12865 states to 12865 states and 53759 transitions. [2021-05-22 02:26:33,292 INFO L78 Accepts]: Start accepts. Automaton has 12865 states and 53759 transitions. Word has length 39 [2021-05-22 02:26:33,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:33,293 INFO L482 AbstractCegarLoop]: Abstraction has 12865 states and 53759 transitions. [2021-05-22 02:26:33,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:33,294 INFO L276 IsEmpty]: Start isEmpty. Operand 12865 states and 53759 transitions. [2021-05-22 02:26:33,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:26:33,338 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:33,339 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:33,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:26:33,339 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:33,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:33,342 INFO L82 PathProgramCache]: Analyzing trace with hash -944687490, now seen corresponding path program 2 times [2021-05-22 02:26:33,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:33,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58904252] [2021-05-22 02:26:33,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:33,434 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 02:26:33,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:33,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58904252] [2021-05-22 02:26:33,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58904252] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:33,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:33,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:26:33,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384903795] [2021-05-22 02:26:33,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:26:33,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:33,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:26:33,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:33,440 INFO L87 Difference]: Start difference. First operand 12865 states and 53759 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:34,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:34,026 INFO L93 Difference]: Finished difference Result 32685 states and 135133 transitions. [2021-05-22 02:26:34,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:26:34,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:26:34,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:34,235 INFO L225 Difference]: With dead ends: 32685 [2021-05-22 02:26:34,235 INFO L226 Difference]: Without dead ends: 32685 [2021-05-22 02:26:34,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:34,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32685 states. [2021-05-22 02:26:35,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32685 to 16006. [2021-05-22 02:26:35,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16006 states, 16005 states have (on average 4.138831615120275) internal successors, (66242), 16005 states have internal predecessors, (66242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:35,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16006 states to 16006 states and 66242 transitions. [2021-05-22 02:26:35,321 INFO L78 Accepts]: Start accepts. Automaton has 16006 states and 66242 transitions. Word has length 39 [2021-05-22 02:26:35,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:35,322 INFO L482 AbstractCegarLoop]: Abstraction has 16006 states and 66242 transitions. [2021-05-22 02:26:35,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:35,323 INFO L276 IsEmpty]: Start isEmpty. Operand 16006 states and 66242 transitions. [2021-05-22 02:26:35,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:26:35,369 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:35,369 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:35,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:26:35,370 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:35,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:35,370 INFO L82 PathProgramCache]: Analyzing trace with hash -696461990, now seen corresponding path program 3 times [2021-05-22 02:26:35,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:35,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812191906] [2021-05-22 02:26:35,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:35,446 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 02:26:35,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:35,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812191906] [2021-05-22 02:26:35,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812191906] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:35,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:35,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:26:35,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726731442] [2021-05-22 02:26:35,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:26:35,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:35,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:26:35,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:35,452 INFO L87 Difference]: Start difference. First operand 16006 states and 66242 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:35,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:35,902 INFO L93 Difference]: Finished difference Result 34910 states and 143500 transitions. [2021-05-22 02:26:35,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:26:35,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:26:35,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:36,056 INFO L225 Difference]: With dead ends: 34910 [2021-05-22 02:26:36,056 INFO L226 Difference]: Without dead ends: 34910 [2021-05-22 02:26:36,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:26:36,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34910 states. [2021-05-22 02:26:37,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34910 to 17906. [2021-05-22 02:26:37,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17906 states, 17905 states have (on average 4.128399888299358) internal successors, (73919), 17905 states have internal predecessors, (73919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17906 states to 17906 states and 73919 transitions. [2021-05-22 02:26:37,198 INFO L78 Accepts]: Start accepts. Automaton has 17906 states and 73919 transitions. Word has length 39 [2021-05-22 02:26:37,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:37,198 INFO L482 AbstractCegarLoop]: Abstraction has 17906 states and 73919 transitions. [2021-05-22 02:26:37,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:37,198 INFO L276 IsEmpty]: Start isEmpty. Operand 17906 states and 73919 transitions. [2021-05-22 02:26:37,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:26:37,242 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:37,242 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:37,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:26:37,242 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:37,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:37,243 INFO L82 PathProgramCache]: Analyzing trace with hash 942509060, now seen corresponding path program 4 times [2021-05-22 02:26:37,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:37,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278901747] [2021-05-22 02:26:37,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:37,330 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 02:26:37,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:37,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278901747] [2021-05-22 02:26:37,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278901747] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:37,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:37,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:26:37,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712176321] [2021-05-22 02:26:37,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:26:37,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:37,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:26:37,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:26:37,333 INFO L87 Difference]: Start difference. First operand 17906 states and 73919 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:37,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:37,880 INFO L93 Difference]: Finished difference Result 31098 states and 127412 transitions. [2021-05-22 02:26:37,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:26:37,885 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:26:37,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:37,998 INFO L225 Difference]: With dead ends: 31098 [2021-05-22 02:26:37,998 INFO L226 Difference]: Without dead ends: 31098 [2021-05-22 02:26:37,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:26:38,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31098 states. [2021-05-22 02:26:38,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31098 to 18162. [2021-05-22 02:26:38,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18162 states, 18161 states have (on average 4.116017840427289) internal successors, (74751), 18161 states have internal predecessors, (74751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:38,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18162 states to 18162 states and 74751 transitions. [2021-05-22 02:26:38,992 INFO L78 Accepts]: Start accepts. Automaton has 18162 states and 74751 transitions. Word has length 39 [2021-05-22 02:26:38,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:38,993 INFO L482 AbstractCegarLoop]: Abstraction has 18162 states and 74751 transitions. [2021-05-22 02:26:38,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:38,993 INFO L276 IsEmpty]: Start isEmpty. Operand 18162 states and 74751 transitions. [2021-05-22 02:26:39,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:26:39,037 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:39,037 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:39,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:26:39,038 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:39,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:39,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1835727168, now seen corresponding path program 5 times [2021-05-22 02:26:39,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:39,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913079691] [2021-05-22 02:26:39,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:39,336 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 02:26:39,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:39,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913079691] [2021-05-22 02:26:39,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913079691] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:39,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:39,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:26:39,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590901765] [2021-05-22 02:26:39,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:26:39,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:39,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:26:39,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:26:39,339 INFO L87 Difference]: Start difference. First operand 18162 states and 74751 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:40,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:40,006 INFO L93 Difference]: Finished difference Result 36912 states and 149288 transitions. [2021-05-22 02:26:40,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:26:40,007 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:26:40,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:40,119 INFO L225 Difference]: With dead ends: 36912 [2021-05-22 02:26:40,119 INFO L226 Difference]: Without dead ends: 36912 [2021-05-22 02:26:40,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:26:40,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36912 states. [2021-05-22 02:26:41,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36912 to 20620. [2021-05-22 02:26:41,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20620 states, 20619 states have (on average 4.04350356467336) internal successors, (83373), 20619 states have internal predecessors, (83373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20620 states to 20620 states and 83373 transitions. [2021-05-22 02:26:41,161 INFO L78 Accepts]: Start accepts. Automaton has 20620 states and 83373 transitions. Word has length 39 [2021-05-22 02:26:41,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:41,163 INFO L482 AbstractCegarLoop]: Abstraction has 20620 states and 83373 transitions. [2021-05-22 02:26:41,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:41,164 INFO L276 IsEmpty]: Start isEmpty. Operand 20620 states and 83373 transitions. [2021-05-22 02:26:41,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:26:41,206 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:41,206 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:41,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:26:41,209 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:41,210 INFO L82 PathProgramCache]: Analyzing trace with hash -518665604, now seen corresponding path program 6 times [2021-05-22 02:26:41,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:41,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110080198] [2021-05-22 02:26:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:41,270 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 02:26:41,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:41,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110080198] [2021-05-22 02:26:41,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110080198] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:41,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:41,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:26:41,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974629827] [2021-05-22 02:26:41,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:26:41,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:41,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:26:41,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:26:41,272 INFO L87 Difference]: Start difference. First operand 20620 states and 83373 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:41,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:41,968 INFO L93 Difference]: Finished difference Result 40027 states and 158784 transitions. [2021-05-22 02:26:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:26:41,969 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:26:41,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:42,064 INFO L225 Difference]: With dead ends: 40027 [2021-05-22 02:26:42,065 INFO L226 Difference]: Without dead ends: 40027 [2021-05-22 02:26:42,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:26:42,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40027 states. [2021-05-22 02:26:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40027 to 23077. [2021-05-22 02:26:42,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23077 states, 23076 states have (on average 3.9587016814005893) internal successors, (91351), 23076 states have internal predecessors, (91351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:42,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23077 states to 23077 states and 91351 transitions. [2021-05-22 02:26:42,959 INFO L78 Accepts]: Start accepts. Automaton has 23077 states and 91351 transitions. Word has length 39 [2021-05-22 02:26:42,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:42,960 INFO L482 AbstractCegarLoop]: Abstraction has 23077 states and 91351 transitions. [2021-05-22 02:26:42,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:42,960 INFO L276 IsEmpty]: Start isEmpty. Operand 23077 states and 91351 transitions. [2021-05-22 02:26:43,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:26:43,010 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:43,010 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:43,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 02:26:43,011 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:43,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:43,011 INFO L82 PathProgramCache]: Analyzing trace with hash -942887360, now seen corresponding path program 7 times [2021-05-22 02:26:43,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:43,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126670915] [2021-05-22 02:26:43,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:43,104 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 02:26:43,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:43,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126670915] [2021-05-22 02:26:43,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126670915] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:43,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:43,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:26:43,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860181777] [2021-05-22 02:26:43,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:26:43,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:43,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:26:43,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:26:43,107 INFO L87 Difference]: Start difference. First operand 23077 states and 91351 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:43,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:43,296 INFO L93 Difference]: Finished difference Result 35393 states and 139274 transitions. [2021-05-22 02:26:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:26:43,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:26:43,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:43,375 INFO L225 Difference]: With dead ends: 35393 [2021-05-22 02:26:43,375 INFO L226 Difference]: Without dead ends: 23425 [2021-05-22 02:26:43,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:43,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23425 states. [2021-05-22 02:26:44,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23425 to 23425. [2021-05-22 02:26:44,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23425 states, 23424 states have (on average 3.8121584699453552) internal successors, (89296), 23424 states have internal predecessors, (89296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:44,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23425 states to 23425 states and 89296 transitions. [2021-05-22 02:26:44,216 INFO L78 Accepts]: Start accepts. Automaton has 23425 states and 89296 transitions. Word has length 39 [2021-05-22 02:26:44,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:44,216 INFO L482 AbstractCegarLoop]: Abstraction has 23425 states and 89296 transitions. [2021-05-22 02:26:44,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:44,216 INFO L276 IsEmpty]: Start isEmpty. Operand 23425 states and 89296 transitions. [2021-05-22 02:26:44,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:26:44,265 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:44,265 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:44,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:26:44,265 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:44,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:44,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1452946602, now seen corresponding path program 8 times [2021-05-22 02:26:44,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:44,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468519329] [2021-05-22 02:26:44,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:44,312 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 02:26:44,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:44,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468519329] [2021-05-22 02:26:44,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468519329] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:44,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:44,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:26:44,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311963555] [2021-05-22 02:26:44,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:26:44,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:44,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:26:44,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:44,314 INFO L87 Difference]: Start difference. First operand 23425 states and 89296 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:44,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:44,612 INFO L93 Difference]: Finished difference Result 41696 states and 157940 transitions. [2021-05-22 02:26:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:26:44,613 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:26:44,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:44,720 INFO L225 Difference]: With dead ends: 41696 [2021-05-22 02:26:44,720 INFO L226 Difference]: Without dead ends: 41642 [2021-05-22 02:26:44,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:26:44,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41642 states. [2021-05-22 02:26:45,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41642 to 24638. [2021-05-22 02:26:45,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24638 states, 24637 states have (on average 3.794658440556886) internal successors, (93489), 24637 states have internal predecessors, (93489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24638 states to 24638 states and 93489 transitions. [2021-05-22 02:26:45,622 INFO L78 Accepts]: Start accepts. Automaton has 24638 states and 93489 transitions. Word has length 39 [2021-05-22 02:26:45,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:45,622 INFO L482 AbstractCegarLoop]: Abstraction has 24638 states and 93489 transitions. [2021-05-22 02:26:45,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:45,622 INFO L276 IsEmpty]: Start isEmpty. Operand 24638 states and 93489 transitions. [2021-05-22 02:26:45,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:26:45,664 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:45,664 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:45,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 02:26:45,664 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:45,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:45,664 INFO L82 PathProgramCache]: Analyzing trace with hash -611468740, now seen corresponding path program 9 times [2021-05-22 02:26:45,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:45,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503962318] [2021-05-22 02:26:45,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:45,713 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 02:26:45,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:45,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503962318] [2021-05-22 02:26:45,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503962318] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:45,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:45,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:26:45,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539870107] [2021-05-22 02:26:45,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:26:45,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:45,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:26:45,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:45,715 INFO L87 Difference]: Start difference. First operand 24638 states and 93489 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:45,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:45,951 INFO L93 Difference]: Finished difference Result 42985 states and 160920 transitions. [2021-05-22 02:26:45,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:26:45,951 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:26:45,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:46,403 INFO L225 Difference]: With dead ends: 42985 [2021-05-22 02:26:46,403 INFO L226 Difference]: Without dead ends: 42898 [2021-05-22 02:26:46,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:46,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42898 states. [2021-05-22 02:26:46,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42898 to 25620. [2021-05-22 02:26:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25620 states, 25619 states have (on average 3.7593973222998556) internal successors, (96312), 25619 states have internal predecessors, (96312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:46,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25620 states to 25620 states and 96312 transitions. [2021-05-22 02:26:46,982 INFO L78 Accepts]: Start accepts. Automaton has 25620 states and 96312 transitions. Word has length 39 [2021-05-22 02:26:46,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:46,982 INFO L482 AbstractCegarLoop]: Abstraction has 25620 states and 96312 transitions. [2021-05-22 02:26:46,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:46,982 INFO L276 IsEmpty]: Start isEmpty. Operand 25620 states and 96312 transitions. [2021-05-22 02:26:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:26:47,029 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:47,029 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:47,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 02:26:47,029 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:47,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:47,030 INFO L82 PathProgramCache]: Analyzing trace with hash 474296098, now seen corresponding path program 10 times [2021-05-22 02:26:47,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:47,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675202523] [2021-05-22 02:26:47,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:47,104 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 02:26:47,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:47,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675202523] [2021-05-22 02:26:47,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675202523] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:47,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:47,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:26:47,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080763455] [2021-05-22 02:26:47,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:26:47,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:47,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:26:47,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:47,105 INFO L87 Difference]: Start difference. First operand 25620 states and 96312 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:47,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:47,721 INFO L93 Difference]: Finished difference Result 43699 states and 163815 transitions. [2021-05-22 02:26:47,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:26:47,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:26:47,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:47,823 INFO L225 Difference]: With dead ends: 43699 [2021-05-22 02:26:47,824 INFO L226 Difference]: Without dead ends: 43663 [2021-05-22 02:26:47,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:26:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43663 states. [2021-05-22 02:26:48,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43663 to 25389. [2021-05-22 02:26:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25389 states, 25388 states have (on average 3.7583110130770443) internal successors, (95416), 25388 states have internal predecessors, (95416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25389 states to 25389 states and 95416 transitions. [2021-05-22 02:26:48,916 INFO L78 Accepts]: Start accepts. Automaton has 25389 states and 95416 transitions. Word has length 39 [2021-05-22 02:26:48,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:48,916 INFO L482 AbstractCegarLoop]: Abstraction has 25389 states and 95416 transitions. [2021-05-22 02:26:48,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:48,917 INFO L276 IsEmpty]: Start isEmpty. Operand 25389 states and 95416 transitions. [2021-05-22 02:26:48,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:26:48,973 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:48,973 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:48,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 02:26:48,973 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:48,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:48,974 INFO L82 PathProgramCache]: Analyzing trace with hash 74649346, now seen corresponding path program 11 times [2021-05-22 02:26:48,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:48,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195350065] [2021-05-22 02:26:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:49,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:49,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195350065] [2021-05-22 02:26:49,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195350065] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:49,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:49,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:26:49,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034139208] [2021-05-22 02:26:49,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:26:49,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:49,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:26:49,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:26:49,019 INFO L87 Difference]: Start difference. First operand 25389 states and 95416 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:49,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:49,185 INFO L93 Difference]: Finished difference Result 25139 states and 94087 transitions. [2021-05-22 02:26:49,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:26:49,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:26:49,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:49,238 INFO L225 Difference]: With dead ends: 25139 [2021-05-22 02:26:49,239 INFO L226 Difference]: Without dead ends: 25088 [2021-05-22 02:26:49,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:49,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25088 states. [2021-05-22 02:26:49,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25088 to 24839. [2021-05-22 02:26:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24839 states, 24838 states have (on average 3.7560995249214915) internal successors, (93294), 24838 states have internal predecessors, (93294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:49,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24839 states to 24839 states and 93294 transitions. [2021-05-22 02:26:49,696 INFO L78 Accepts]: Start accepts. Automaton has 24839 states and 93294 transitions. Word has length 39 [2021-05-22 02:26:49,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:49,696 INFO L482 AbstractCegarLoop]: Abstraction has 24839 states and 93294 transitions. [2021-05-22 02:26:49,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:49,696 INFO L276 IsEmpty]: Start isEmpty. Operand 24839 states and 93294 transitions. [2021-05-22 02:26:49,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:26:49,738 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:49,738 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:49,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-22 02:26:49,738 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:49,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:49,738 INFO L82 PathProgramCache]: Analyzing trace with hash -798849100, now seen corresponding path program 12 times [2021-05-22 02:26:49,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:49,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454049073] [2021-05-22 02:26:49,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:49,788 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 02:26:49,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:49,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454049073] [2021-05-22 02:26:49,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454049073] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:49,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:49,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:26:49,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755901315] [2021-05-22 02:26:49,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:26:49,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:49,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:26:49,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:26:49,790 INFO L87 Difference]: Start difference. First operand 24839 states and 93294 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:50,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:50,364 INFO L93 Difference]: Finished difference Result 43989 states and 162312 transitions. [2021-05-22 02:26:50,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:26:50,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:26:50,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:50,461 INFO L225 Difference]: With dead ends: 43989 [2021-05-22 02:26:50,461 INFO L226 Difference]: Without dead ends: 43863 [2021-05-22 02:26:50,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:26:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43863 states. [2021-05-22 02:26:51,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43863 to 28440. [2021-05-22 02:26:51,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28440 states, 28439 states have (on average 3.686486866626815) internal successors, (104840), 28439 states have internal predecessors, (104840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:51,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28440 states to 28440 states and 104840 transitions. [2021-05-22 02:26:51,394 INFO L78 Accepts]: Start accepts. Automaton has 28440 states and 104840 transitions. Word has length 39 [2021-05-22 02:26:51,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:51,394 INFO L482 AbstractCegarLoop]: Abstraction has 28440 states and 104840 transitions. [2021-05-22 02:26:51,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:51,394 INFO L276 IsEmpty]: Start isEmpty. Operand 28440 states and 104840 transitions. [2021-05-22 02:26:51,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:26:51,441 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:51,441 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:51,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-22 02:26:51,441 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:51,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:51,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1771965296, now seen corresponding path program 13 times [2021-05-22 02:26:51,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:51,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663754890] [2021-05-22 02:26:51,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:51,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:51,496 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 02:26:51,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:51,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663754890] [2021-05-22 02:26:51,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663754890] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:51,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:51,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:26:51,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595582563] [2021-05-22 02:26:51,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:26:51,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:51,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:26:51,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:26:51,498 INFO L87 Difference]: Start difference. First operand 28440 states and 104840 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:51,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:51,937 INFO L93 Difference]: Finished difference Result 42223 states and 154538 transitions. [2021-05-22 02:26:51,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:26:51,937 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:26:51,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:52,053 INFO L225 Difference]: With dead ends: 42223 [2021-05-22 02:26:52,054 INFO L226 Difference]: Without dead ends: 42199 [2021-05-22 02:26:52,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:26:52,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42199 states. [2021-05-22 02:26:52,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42199 to 28621. [2021-05-22 02:26:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28621 states, 28620 states have (on average 3.675611460517121) internal successors, (105196), 28620 states have internal predecessors, (105196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28621 states to 28621 states and 105196 transitions. [2021-05-22 02:26:52,983 INFO L78 Accepts]: Start accepts. Automaton has 28621 states and 105196 transitions. Word has length 39 [2021-05-22 02:26:52,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:52,983 INFO L482 AbstractCegarLoop]: Abstraction has 28621 states and 105196 transitions. [2021-05-22 02:26:52,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:52,984 INFO L276 IsEmpty]: Start isEmpty. Operand 28621 states and 105196 transitions. [2021-05-22 02:26:53,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:26:53,029 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:53,029 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:53,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-22 02:26:53,030 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:53,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:53,030 INFO L82 PathProgramCache]: Analyzing trace with hash -692989772, now seen corresponding path program 14 times [2021-05-22 02:26:53,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:53,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240996233] [2021-05-22 02:26:53,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:53,062 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 02:26:53,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:53,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240996233] [2021-05-22 02:26:53,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240996233] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:53,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:53,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:26:53,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790631947] [2021-05-22 02:26:53,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:26:53,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:53,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:26:53,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:26:53,063 INFO L87 Difference]: Start difference. First operand 28621 states and 105196 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:53,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:53,253 INFO L93 Difference]: Finished difference Result 27813 states and 101796 transitions. [2021-05-22 02:26:53,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:26:53,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:26:53,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:53,317 INFO L225 Difference]: With dead ends: 27813 [2021-05-22 02:26:53,317 INFO L226 Difference]: Without dead ends: 27738 [2021-05-22 02:26:53,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:53,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27738 states. [2021-05-22 02:26:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27738 to 27386. [2021-05-22 02:26:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27386 states, 27385 states have (on average 3.679496074493336) internal successors, (100763), 27385 states have internal predecessors, (100763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:54,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27386 states to 27386 states and 100763 transitions. [2021-05-22 02:26:54,230 INFO L78 Accepts]: Start accepts. Automaton has 27386 states and 100763 transitions. Word has length 39 [2021-05-22 02:26:54,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:54,230 INFO L482 AbstractCegarLoop]: Abstraction has 27386 states and 100763 transitions. [2021-05-22 02:26:54,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:54,230 INFO L276 IsEmpty]: Start isEmpty. Operand 27386 states and 100763 transitions. [2021-05-22 02:26:54,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:26:54,278 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:54,278 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:54,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-22 02:26:54,278 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:54,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:54,279 INFO L82 PathProgramCache]: Analyzing trace with hash -747163012, now seen corresponding path program 15 times [2021-05-22 02:26:54,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:54,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236447395] [2021-05-22 02:26:54,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:54,332 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 02:26:54,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:54,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236447395] [2021-05-22 02:26:54,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236447395] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:54,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:54,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:26:54,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287827078] [2021-05-22 02:26:54,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:26:54,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:54,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:26:54,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:54,335 INFO L87 Difference]: Start difference. First operand 27386 states and 100763 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:54,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:54,602 INFO L93 Difference]: Finished difference Result 50523 states and 183246 transitions. [2021-05-22 02:26:54,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:26:54,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:26:54,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:54,712 INFO L225 Difference]: With dead ends: 50523 [2021-05-22 02:26:54,712 INFO L226 Difference]: Without dead ends: 50475 [2021-05-22 02:26:54,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:54,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50475 states. [2021-05-22 02:26:55,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50475 to 27707. [2021-05-22 02:26:55,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27707 states, 27706 states have (on average 3.667978055294882) internal successors, (101625), 27706 states have internal predecessors, (101625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27707 states to 27707 states and 101625 transitions. [2021-05-22 02:26:55,682 INFO L78 Accepts]: Start accepts. Automaton has 27707 states and 101625 transitions. Word has length 39 [2021-05-22 02:26:55,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:55,682 INFO L482 AbstractCegarLoop]: Abstraction has 27707 states and 101625 transitions. [2021-05-22 02:26:55,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:55,682 INFO L276 IsEmpty]: Start isEmpty. Operand 27707 states and 101625 transitions. [2021-05-22 02:26:55,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:26:55,728 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:55,728 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:55,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-22 02:26:55,728 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:55,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:55,728 INFO L82 PathProgramCache]: Analyzing trace with hash 301429852, now seen corresponding path program 16 times [2021-05-22 02:26:55,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:55,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055577304] [2021-05-22 02:26:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:55,763 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 02:26:55,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:55,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055577304] [2021-05-22 02:26:55,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055577304] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:55,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:55,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:26:55,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633145055] [2021-05-22 02:26:55,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:26:55,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:55,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:26:55,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:55,765 INFO L87 Difference]: Start difference. First operand 27707 states and 101625 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:56,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:56,001 INFO L93 Difference]: Finished difference Result 39646 states and 142334 transitions. [2021-05-22 02:26:56,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:26:56,002 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:26:56,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:56,080 INFO L225 Difference]: With dead ends: 39646 [2021-05-22 02:26:56,080 INFO L226 Difference]: Without dead ends: 39506 [2021-05-22 02:26:56,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:56,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39506 states. [2021-05-22 02:26:56,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39506 to 23423. [2021-05-22 02:26:56,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23423 states, 23422 states have (on average 3.5910255315515327) internal successors, (84109), 23422 states have internal predecessors, (84109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:56,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23423 states to 23423 states and 84109 transitions. [2021-05-22 02:26:56,859 INFO L78 Accepts]: Start accepts. Automaton has 23423 states and 84109 transitions. Word has length 39 [2021-05-22 02:26:56,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:56,860 INFO L482 AbstractCegarLoop]: Abstraction has 23423 states and 84109 transitions. [2021-05-22 02:26:56,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:56,860 INFO L276 IsEmpty]: Start isEmpty. Operand 23423 states and 84109 transitions. [2021-05-22 02:26:56,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:26:56,893 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:56,893 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:56,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-22 02:26:56,894 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:56,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:56,894 INFO L82 PathProgramCache]: Analyzing trace with hash -2132816678, now seen corresponding path program 17 times [2021-05-22 02:26:56,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:56,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011065961] [2021-05-22 02:26:56,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:56,938 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 02:26:56,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:56,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011065961] [2021-05-22 02:26:56,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011065961] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:56,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:56,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:26:56,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811408497] [2021-05-22 02:26:56,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:26:56,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:56,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:26:56,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:56,940 INFO L87 Difference]: Start difference. First operand 23423 states and 84109 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:57,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:57,182 INFO L93 Difference]: Finished difference Result 40941 states and 145659 transitions. [2021-05-22 02:26:57,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:26:57,183 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:26:57,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:57,266 INFO L225 Difference]: With dead ends: 40941 [2021-05-22 02:26:57,266 INFO L226 Difference]: Without dead ends: 40659 [2021-05-22 02:26:57,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:26:57,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40659 states. [2021-05-22 02:26:58,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40659 to 24350. [2021-05-22 02:26:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24350 states, 24349 states have (on average 3.5688118608567088) internal successors, (86897), 24349 states have internal predecessors, (86897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:58,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24350 states to 24350 states and 86897 transitions. [2021-05-22 02:26:58,103 INFO L78 Accepts]: Start accepts. Automaton has 24350 states and 86897 transitions. Word has length 39 [2021-05-22 02:26:58,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:58,104 INFO L482 AbstractCegarLoop]: Abstraction has 24350 states and 86897 transitions. [2021-05-22 02:26:58,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:58,104 INFO L276 IsEmpty]: Start isEmpty. Operand 24350 states and 86897 transitions. [2021-05-22 02:26:58,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:26:58,142 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:58,142 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:58,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-22 02:26:58,143 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:58,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:58,143 INFO L82 PathProgramCache]: Analyzing trace with hash 619948732, now seen corresponding path program 18 times [2021-05-22 02:26:58,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:58,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785615709] [2021-05-22 02:26:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:58,192 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 02:26:58,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:58,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785615709] [2021-05-22 02:26:58,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785615709] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:58,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:58,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:26:58,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679527445] [2021-05-22 02:26:58,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:26:58,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:58,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:26:58,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:26:58,194 INFO L87 Difference]: Start difference. First operand 24350 states and 86897 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:58,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:58,531 INFO L93 Difference]: Finished difference Result 41722 states and 144495 transitions. [2021-05-22 02:26:58,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:26:58,531 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:26:58,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:58,617 INFO L225 Difference]: With dead ends: 41722 [2021-05-22 02:26:58,617 INFO L226 Difference]: Without dead ends: 41134 [2021-05-22 02:26:58,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:26:58,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41134 states. [2021-05-22 02:26:59,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41134 to 24602. [2021-05-22 02:26:59,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24602 states, 24601 states have (on average 3.503231575952197) internal successors, (86183), 24601 states have internal predecessors, (86183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24602 states to 24602 states and 86183 transitions. [2021-05-22 02:26:59,633 INFO L78 Accepts]: Start accepts. Automaton has 24602 states and 86183 transitions. Word has length 39 [2021-05-22 02:26:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:59,633 INFO L482 AbstractCegarLoop]: Abstraction has 24602 states and 86183 transitions. [2021-05-22 02:26:59,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:59,633 INFO L276 IsEmpty]: Start isEmpty. Operand 24602 states and 86183 transitions. [2021-05-22 02:26:59,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:26:59,672 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:59,673 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:59,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-22 02:26:59,673 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:59,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:59,673 INFO L82 PathProgramCache]: Analyzing trace with hash -262188358, now seen corresponding path program 19 times [2021-05-22 02:26:59,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:59,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084201700] [2021-05-22 02:26:59,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:59,715 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 02:26:59,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:59,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084201700] [2021-05-22 02:26:59,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084201700] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:59,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:59,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:26:59,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845582329] [2021-05-22 02:26:59,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:26:59,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:59,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:26:59,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:59,717 INFO L87 Difference]: Start difference. First operand 24602 states and 86183 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:59,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:59,948 INFO L93 Difference]: Finished difference Result 39683 states and 136545 transitions. [2021-05-22 02:26:59,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:26:59,949 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:26:59,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:00,022 INFO L225 Difference]: With dead ends: 39683 [2021-05-22 02:27:00,023 INFO L226 Difference]: Without dead ends: 39331 [2021-05-22 02:27:00,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:27:00,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39331 states. [2021-05-22 02:27:00,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39331 to 23826. [2021-05-22 02:27:00,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23826 states, 23825 states have (on average 3.4768520461699897) internal successors, (82836), 23825 states have internal predecessors, (82836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:00,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23826 states to 23826 states and 82836 transitions. [2021-05-22 02:27:00,908 INFO L78 Accepts]: Start accepts. Automaton has 23826 states and 82836 transitions. Word has length 39 [2021-05-22 02:27:00,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:00,908 INFO L482 AbstractCegarLoop]: Abstraction has 23826 states and 82836 transitions. [2021-05-22 02:27:00,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:00,908 INFO L276 IsEmpty]: Start isEmpty. Operand 23826 states and 82836 transitions. [2021-05-22 02:27:00,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:00,945 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:00,945 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:00,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-22 02:27:00,945 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:00,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:00,945 INFO L82 PathProgramCache]: Analyzing trace with hash -999623524, now seen corresponding path program 20 times [2021-05-22 02:27:00,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:00,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738964868] [2021-05-22 02:27:00,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:00,990 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 02:27:00,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:00,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738964868] [2021-05-22 02:27:00,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738964868] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:00,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:00,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:27:00,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676935525] [2021-05-22 02:27:00,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:27:00,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:00,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:27:00,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:27:00,992 INFO L87 Difference]: Start difference. First operand 23826 states and 82836 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:01,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:01,275 INFO L93 Difference]: Finished difference Result 36259 states and 121650 transitions. [2021-05-22 02:27:01,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:27:01,277 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:01,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:01,342 INFO L225 Difference]: With dead ends: 36259 [2021-05-22 02:27:01,343 INFO L226 Difference]: Without dead ends: 35323 [2021-05-22 02:27:01,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:27:01,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35323 states. [2021-05-22 02:27:01,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35323 to 21699. [2021-05-22 02:27:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21699 states, 21698 states have (on average 3.39409162134759) internal successors, (73645), 21698 states have internal predecessors, (73645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21699 states to 21699 states and 73645 transitions. [2021-05-22 02:27:01,791 INFO L78 Accepts]: Start accepts. Automaton has 21699 states and 73645 transitions. Word has length 39 [2021-05-22 02:27:01,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:01,791 INFO L482 AbstractCegarLoop]: Abstraction has 21699 states and 73645 transitions. [2021-05-22 02:27:01,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:01,791 INFO L276 IsEmpty]: Start isEmpty. Operand 21699 states and 73645 transitions. [2021-05-22 02:27:01,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:01,822 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:01,822 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:01,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-22 02:27:01,823 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:01,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:01,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1489406878, now seen corresponding path program 21 times [2021-05-22 02:27:01,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:01,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997850540] [2021-05-22 02:27:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:01,857 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 02:27:01,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:01,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997850540] [2021-05-22 02:27:01,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997850540] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:01,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:01,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:27:01,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493261541] [2021-05-22 02:27:01,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:27:01,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:01,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:27:01,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:27:01,865 INFO L87 Difference]: Start difference. First operand 21699 states and 73645 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:02,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:02,278 INFO L93 Difference]: Finished difference Result 34469 states and 114405 transitions. [2021-05-22 02:27:02,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:27:02,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:02,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:02,337 INFO L225 Difference]: With dead ends: 34469 [2021-05-22 02:27:02,337 INFO L226 Difference]: Without dead ends: 34285 [2021-05-22 02:27:02,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:27:02,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34285 states. [2021-05-22 02:27:02,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34285 to 20585. [2021-05-22 02:27:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20585 states, 20584 states have (on average 3.3424504469490866) internal successors, (68801), 20584 states have internal predecessors, (68801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20585 states to 20585 states and 68801 transitions. [2021-05-22 02:27:02,733 INFO L78 Accepts]: Start accepts. Automaton has 20585 states and 68801 transitions. Word has length 39 [2021-05-22 02:27:02,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:02,733 INFO L482 AbstractCegarLoop]: Abstraction has 20585 states and 68801 transitions. [2021-05-22 02:27:02,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:02,733 INFO L276 IsEmpty]: Start isEmpty. Operand 20585 states and 68801 transitions. [2021-05-22 02:27:02,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:02,760 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:02,760 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:02,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-22 02:27:02,760 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:02,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:02,760 INFO L82 PathProgramCache]: Analyzing trace with hash 921984860, now seen corresponding path program 22 times [2021-05-22 02:27:02,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:02,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451523485] [2021-05-22 02:27:02,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:02,799 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 02:27:02,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:02,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451523485] [2021-05-22 02:27:02,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451523485] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:02,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:02,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:27:02,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200412726] [2021-05-22 02:27:02,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:27:02,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:02,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:27:02,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:27:02,800 INFO L87 Difference]: Start difference. First operand 20585 states and 68801 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:03,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:03,093 INFO L93 Difference]: Finished difference Result 35148 states and 115453 transitions. [2021-05-22 02:27:03,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:27:03,094 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:03,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:03,155 INFO L225 Difference]: With dead ends: 35148 [2021-05-22 02:27:03,156 INFO L226 Difference]: Without dead ends: 34004 [2021-05-22 02:27:03,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:27:03,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34004 states. [2021-05-22 02:27:03,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34004 to 18802. [2021-05-22 02:27:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18802 states, 18801 states have (on average 3.3137067177277806) internal successors, (62301), 18801 states have internal predecessors, (62301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:03,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18802 states to 18802 states and 62301 transitions. [2021-05-22 02:27:03,758 INFO L78 Accepts]: Start accepts. Automaton has 18802 states and 62301 transitions. Word has length 39 [2021-05-22 02:27:03,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:03,758 INFO L482 AbstractCegarLoop]: Abstraction has 18802 states and 62301 transitions. [2021-05-22 02:27:03,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:03,758 INFO L276 IsEmpty]: Start isEmpty. Operand 18802 states and 62301 transitions. [2021-05-22 02:27:03,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:03,784 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:03,785 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:03,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-22 02:27:03,785 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:03,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:03,785 INFO L82 PathProgramCache]: Analyzing trace with hash 84428698, now seen corresponding path program 23 times [2021-05-22 02:27:03,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:03,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951989098] [2021-05-22 02:27:03,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:03,837 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 02:27:03,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:03,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951989098] [2021-05-22 02:27:03,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951989098] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:03,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:03,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:27:03,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182164180] [2021-05-22 02:27:03,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:27:03,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:03,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:27:03,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:27:03,838 INFO L87 Difference]: Start difference. First operand 18802 states and 62301 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:04,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:04,161 INFO L93 Difference]: Finished difference Result 30242 states and 99222 transitions. [2021-05-22 02:27:04,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:27:04,161 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:04,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:04,224 INFO L225 Difference]: With dead ends: 30242 [2021-05-22 02:27:04,224 INFO L226 Difference]: Without dead ends: 30074 [2021-05-22 02:27:04,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:27:04,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30074 states. [2021-05-22 02:27:04,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30074 to 18728. [2021-05-22 02:27:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18728 states, 18727 states have (on average 3.3072035029636355) internal successors, (61934), 18727 states have internal predecessors, (61934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18728 states to 18728 states and 61934 transitions. [2021-05-22 02:27:04,621 INFO L78 Accepts]: Start accepts. Automaton has 18728 states and 61934 transitions. Word has length 39 [2021-05-22 02:27:04,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:04,621 INFO L482 AbstractCegarLoop]: Abstraction has 18728 states and 61934 transitions. [2021-05-22 02:27:04,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:04,621 INFO L276 IsEmpty]: Start isEmpty. Operand 18728 states and 61934 transitions. [2021-05-22 02:27:04,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:04,646 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:04,646 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:04,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-22 02:27:04,646 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:04,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:04,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1685327770, now seen corresponding path program 24 times [2021-05-22 02:27:04,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:04,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589740903] [2021-05-22 02:27:04,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:04,690 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 02:27:04,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:04,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589740903] [2021-05-22 02:27:04,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589740903] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:04,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:04,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:27:04,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215292380] [2021-05-22 02:27:04,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:27:04,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:04,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:27:04,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:27:04,691 INFO L87 Difference]: Start difference. First operand 18728 states and 61934 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:05,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:05,113 INFO L93 Difference]: Finished difference Result 29724 states and 97345 transitions. [2021-05-22 02:27:05,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:27:05,114 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:05,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:05,166 INFO L225 Difference]: With dead ends: 29724 [2021-05-22 02:27:05,166 INFO L226 Difference]: Without dead ends: 29232 [2021-05-22 02:27:05,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:27:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29232 states. [2021-05-22 02:27:05,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29232 to 18276. [2021-05-22 02:27:05,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18276 states, 18275 states have (on average 3.3015047879616963) internal successors, (60335), 18275 states have internal predecessors, (60335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18276 states to 18276 states and 60335 transitions. [2021-05-22 02:27:05,530 INFO L78 Accepts]: Start accepts. Automaton has 18276 states and 60335 transitions. Word has length 39 [2021-05-22 02:27:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:05,530 INFO L482 AbstractCegarLoop]: Abstraction has 18276 states and 60335 transitions. [2021-05-22 02:27:05,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:05,530 INFO L276 IsEmpty]: Start isEmpty. Operand 18276 states and 60335 transitions. [2021-05-22 02:27:05,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:05,553 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:05,554 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:05,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-22 02:27:05,554 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:05,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:05,554 INFO L82 PathProgramCache]: Analyzing trace with hash 6385336, now seen corresponding path program 25 times [2021-05-22 02:27:05,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:05,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541001768] [2021-05-22 02:27:05,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:05,623 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 02:27:05,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:05,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541001768] [2021-05-22 02:27:05,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541001768] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:05,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:05,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-22 02:27:05,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890233188] [2021-05-22 02:27:05,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:27:05,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:05,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:27:05,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:27:05,624 INFO L87 Difference]: Start difference. First operand 18276 states and 60335 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:06,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:06,002 INFO L93 Difference]: Finished difference Result 29259 states and 95348 transitions. [2021-05-22 02:27:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:27:06,002 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:06,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:06,055 INFO L225 Difference]: With dead ends: 29259 [2021-05-22 02:27:06,055 INFO L226 Difference]: Without dead ends: 28821 [2021-05-22 02:27:06,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:27:06,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28821 states. [2021-05-22 02:27:06,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28821 to 18412. [2021-05-22 02:27:06,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18412 states, 18411 states have (on average 3.280647439031014) internal successors, (60400), 18411 states have internal predecessors, (60400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:06,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18412 states to 18412 states and 60400 transitions. [2021-05-22 02:27:06,501 INFO L78 Accepts]: Start accepts. Automaton has 18412 states and 60400 transitions. Word has length 39 [2021-05-22 02:27:06,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:06,501 INFO L482 AbstractCegarLoop]: Abstraction has 18412 states and 60400 transitions. [2021-05-22 02:27:06,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:06,502 INFO L276 IsEmpty]: Start isEmpty. Operand 18412 states and 60400 transitions. [2021-05-22 02:27:06,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:06,526 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:06,526 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:06,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-22 02:27:06,526 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:06,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:06,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1165798022, now seen corresponding path program 26 times [2021-05-22 02:27:06,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:06,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317273925] [2021-05-22 02:27:06,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:06,566 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 02:27:06,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:06,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317273925] [2021-05-22 02:27:06,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317273925] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:06,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:06,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:27:06,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256487868] [2021-05-22 02:27:06,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:27:06,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:06,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:27:06,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:27:06,568 INFO L87 Difference]: Start difference. First operand 18412 states and 60400 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:06,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:06,836 INFO L93 Difference]: Finished difference Result 30084 states and 97312 transitions. [2021-05-22 02:27:06,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:27:06,836 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:06,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:06,887 INFO L225 Difference]: With dead ends: 30084 [2021-05-22 02:27:06,887 INFO L226 Difference]: Without dead ends: 29828 [2021-05-22 02:27:06,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:27:06,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29828 states. [2021-05-22 02:27:07,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29828 to 18388. [2021-05-22 02:27:07,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18388 states, 18387 states have (on average 3.2692663294719093) internal successors, (60112), 18387 states have internal predecessors, (60112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18388 states to 18388 states and 60112 transitions. [2021-05-22 02:27:07,249 INFO L78 Accepts]: Start accepts. Automaton has 18388 states and 60112 transitions. Word has length 39 [2021-05-22 02:27:07,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:07,249 INFO L482 AbstractCegarLoop]: Abstraction has 18388 states and 60112 transitions. [2021-05-22 02:27:07,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:07,250 INFO L276 IsEmpty]: Start isEmpty. Operand 18388 states and 60112 transitions. [2021-05-22 02:27:07,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:07,274 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:07,274 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:07,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-22 02:27:07,275 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:07,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:07,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1239867770, now seen corresponding path program 27 times [2021-05-22 02:27:07,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:07,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936457493] [2021-05-22 02:27:07,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:07,322 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 02:27:07,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:07,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936457493] [2021-05-22 02:27:07,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936457493] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:07,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:07,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:27:07,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823307461] [2021-05-22 02:27:07,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:27:07,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:07,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:27:07,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:27:07,324 INFO L87 Difference]: Start difference. First operand 18388 states and 60112 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:07,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:07,731 INFO L93 Difference]: Finished difference Result 29768 states and 96152 transitions. [2021-05-22 02:27:07,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:27:07,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:07,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:07,796 INFO L225 Difference]: With dead ends: 29768 [2021-05-22 02:27:07,796 INFO L226 Difference]: Without dead ends: 28672 [2021-05-22 02:27:07,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:27:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28672 states. [2021-05-22 02:27:08,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28672 to 17734. [2021-05-22 02:27:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17734 states, 17733 states have (on average 3.2457564991823156) internal successors, (57557), 17733 states have internal predecessors, (57557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:08,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17734 states to 17734 states and 57557 transitions. [2021-05-22 02:27:08,157 INFO L78 Accepts]: Start accepts. Automaton has 17734 states and 57557 transitions. Word has length 39 [2021-05-22 02:27:08,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:08,157 INFO L482 AbstractCegarLoop]: Abstraction has 17734 states and 57557 transitions. [2021-05-22 02:27:08,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:08,157 INFO L276 IsEmpty]: Start isEmpty. Operand 17734 states and 57557 transitions. [2021-05-22 02:27:08,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:08,181 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:08,181 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:08,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-22 02:27:08,181 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:08,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:08,181 INFO L82 PathProgramCache]: Analyzing trace with hash 492882072, now seen corresponding path program 28 times [2021-05-22 02:27:08,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:08,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701164841] [2021-05-22 02:27:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:08,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:08,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701164841] [2021-05-22 02:27:08,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701164841] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:08,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:08,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-22 02:27:08,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993395791] [2021-05-22 02:27:08,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:27:08,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:08,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:27:08,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:27:08,233 INFO L87 Difference]: Start difference. First operand 17734 states and 57557 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:08,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:08,659 INFO L93 Difference]: Finished difference Result 28772 states and 92301 transitions. [2021-05-22 02:27:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:27:08,659 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:08,724 INFO L225 Difference]: With dead ends: 28772 [2021-05-22 02:27:08,724 INFO L226 Difference]: Without dead ends: 27282 [2021-05-22 02:27:08,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:27:08,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27282 states. [2021-05-22 02:27:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27282 to 16786. [2021-05-22 02:27:09,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16786 states, 16785 states have (on average 3.2374739350610664) internal successors, (54341), 16785 states have internal predecessors, (54341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16786 states to 16786 states and 54341 transitions. [2021-05-22 02:27:09,190 INFO L78 Accepts]: Start accepts. Automaton has 16786 states and 54341 transitions. Word has length 39 [2021-05-22 02:27:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:09,190 INFO L482 AbstractCegarLoop]: Abstraction has 16786 states and 54341 transitions. [2021-05-22 02:27:09,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:09,190 INFO L276 IsEmpty]: Start isEmpty. Operand 16786 states and 54341 transitions. [2021-05-22 02:27:09,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:09,212 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:09,213 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:09,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-22 02:27:09,213 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:09,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:09,213 INFO L82 PathProgramCache]: Analyzing trace with hash -652913060, now seen corresponding path program 29 times [2021-05-22 02:27:09,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:09,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751918761] [2021-05-22 02:27:09,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:09,270 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 02:27:09,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:09,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751918761] [2021-05-22 02:27:09,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751918761] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:09,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:09,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-22 02:27:09,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161778086] [2021-05-22 02:27:09,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:27:09,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:09,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:27:09,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:27:09,271 INFO L87 Difference]: Start difference. First operand 16786 states and 54341 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:09,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:09,647 INFO L93 Difference]: Finished difference Result 27715 states and 88963 transitions. [2021-05-22 02:27:09,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:27:09,647 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:09,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:09,695 INFO L225 Difference]: With dead ends: 27715 [2021-05-22 02:27:09,695 INFO L226 Difference]: Without dead ends: 26709 [2021-05-22 02:27:09,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:27:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26709 states. [2021-05-22 02:27:09,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26709 to 16048. [2021-05-22 02:27:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16048 states, 16047 states have (on average 3.2265220913566397) internal successors, (51776), 16047 states have internal predecessors, (51776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16048 states to 16048 states and 51776 transitions. [2021-05-22 02:27:10,003 INFO L78 Accepts]: Start accepts. Automaton has 16048 states and 51776 transitions. Word has length 39 [2021-05-22 02:27:10,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:10,003 INFO L482 AbstractCegarLoop]: Abstraction has 16048 states and 51776 transitions. [2021-05-22 02:27:10,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:10,004 INFO L276 IsEmpty]: Start isEmpty. Operand 16048 states and 51776 transitions. [2021-05-22 02:27:10,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:10,025 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:10,025 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:10,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-22 02:27:10,025 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:10,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:10,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1990404212, now seen corresponding path program 30 times [2021-05-22 02:27:10,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:10,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873087008] [2021-05-22 02:27:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:10,077 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 02:27:10,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:10,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873087008] [2021-05-22 02:27:10,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873087008] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:10,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:10,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:27:10,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339417934] [2021-05-22 02:27:10,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:27:10,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:10,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:27:10,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:27:10,078 INFO L87 Difference]: Start difference. First operand 16048 states and 51776 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:10,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:10,270 INFO L93 Difference]: Finished difference Result 26537 states and 84145 transitions. [2021-05-22 02:27:10,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:27:10,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:10,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:10,329 INFO L225 Difference]: With dead ends: 26537 [2021-05-22 02:27:10,329 INFO L226 Difference]: Without dead ends: 26193 [2021-05-22 02:27:10,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:27:10,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26193 states. [2021-05-22 02:27:10,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26193 to 15396. [2021-05-22 02:27:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15396 states, 15395 states have (on average 3.2042871062033127) internal successors, (49330), 15395 states have internal predecessors, (49330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:10,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15396 states to 15396 states and 49330 transitions. [2021-05-22 02:27:10,893 INFO L78 Accepts]: Start accepts. Automaton has 15396 states and 49330 transitions. Word has length 39 [2021-05-22 02:27:10,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:10,893 INFO L482 AbstractCegarLoop]: Abstraction has 15396 states and 49330 transitions. [2021-05-22 02:27:10,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:10,893 INFO L276 IsEmpty]: Start isEmpty. Operand 15396 states and 49330 transitions. [2021-05-22 02:27:10,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:10,913 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:10,913 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:10,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-22 02:27:10,913 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:10,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:10,914 INFO L82 PathProgramCache]: Analyzing trace with hash -486861366, now seen corresponding path program 31 times [2021-05-22 02:27:10,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:10,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701532066] [2021-05-22 02:27:10,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:10,957 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 02:27:10,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:10,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701532066] [2021-05-22 02:27:10,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701532066] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:10,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:10,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:27:10,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759541958] [2021-05-22 02:27:10,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:27:10,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:10,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:27:10,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:27:10,958 INFO L87 Difference]: Start difference. First operand 15396 states and 49330 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:11,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:11,177 INFO L93 Difference]: Finished difference Result 19582 states and 58220 transitions. [2021-05-22 02:27:11,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:27:11,177 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:11,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:11,203 INFO L225 Difference]: With dead ends: 19582 [2021-05-22 02:27:11,203 INFO L226 Difference]: Without dead ends: 18047 [2021-05-22 02:27:11,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:27:11,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18047 states. [2021-05-22 02:27:11,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18047 to 10863. [2021-05-22 02:27:11,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10863 states, 10862 states have (on average 3.029736696740932) internal successors, (32909), 10862 states have internal predecessors, (32909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:11,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10863 states to 10863 states and 32909 transitions. [2021-05-22 02:27:11,394 INFO L78 Accepts]: Start accepts. Automaton has 10863 states and 32909 transitions. Word has length 39 [2021-05-22 02:27:11,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:11,395 INFO L482 AbstractCegarLoop]: Abstraction has 10863 states and 32909 transitions. [2021-05-22 02:27:11,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:11,395 INFO L276 IsEmpty]: Start isEmpty. Operand 10863 states and 32909 transitions. [2021-05-22 02:27:11,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:11,409 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:11,409 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:11,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-22 02:27:11,409 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:11,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:11,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1712472694, now seen corresponding path program 32 times [2021-05-22 02:27:11,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:11,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102830483] [2021-05-22 02:27:11,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:11,462 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 02:27:11,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:11,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102830483] [2021-05-22 02:27:11,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102830483] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:11,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:11,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:27:11,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127738735] [2021-05-22 02:27:11,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:27:11,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:11,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:27:11,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:27:11,464 INFO L87 Difference]: Start difference. First operand 10863 states and 32909 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:11,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:11,687 INFO L93 Difference]: Finished difference Result 16060 states and 47771 transitions. [2021-05-22 02:27:11,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:27:11,693 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:11,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:11,719 INFO L225 Difference]: With dead ends: 16060 [2021-05-22 02:27:11,719 INFO L226 Difference]: Without dead ends: 15380 [2021-05-22 02:27:11,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:27:11,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15380 states. [2021-05-22 02:27:11,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15380 to 10289. [2021-05-22 02:27:11,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10289 states, 10288 states have (on average 3.010303265940902) internal successors, (30970), 10288 states have internal predecessors, (30970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:11,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10289 states to 10289 states and 30970 transitions. [2021-05-22 02:27:11,881 INFO L78 Accepts]: Start accepts. Automaton has 10289 states and 30970 transitions. Word has length 39 [2021-05-22 02:27:11,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:11,881 INFO L482 AbstractCegarLoop]: Abstraction has 10289 states and 30970 transitions. [2021-05-22 02:27:11,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:11,881 INFO L276 IsEmpty]: Start isEmpty. Operand 10289 states and 30970 transitions. [2021-05-22 02:27:11,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:11,892 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:11,892 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:11,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-22 02:27:11,893 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:11,893 INFO L82 PathProgramCache]: Analyzing trace with hash -12539988, now seen corresponding path program 33 times [2021-05-22 02:27:11,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:11,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180348463] [2021-05-22 02:27:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:12,056 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 02:27:12,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:12,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180348463] [2021-05-22 02:27:12,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180348463] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:12,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:12,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-22 02:27:12,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947469963] [2021-05-22 02:27:12,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:27:12,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:12,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:27:12,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:27:12,058 INFO L87 Difference]: Start difference. First operand 10289 states and 30970 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:12,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:12,394 INFO L93 Difference]: Finished difference Result 14404 states and 42007 transitions. [2021-05-22 02:27:12,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:27:12,395 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:12,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:12,420 INFO L225 Difference]: With dead ends: 14404 [2021-05-22 02:27:12,421 INFO L226 Difference]: Without dead ends: 13806 [2021-05-22 02:27:12,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:27:12,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13806 states. [2021-05-22 02:27:12,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13806 to 9515. [2021-05-22 02:27:12,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9515 states, 9514 states have (on average 2.974248475930208) internal successors, (28297), 9514 states have internal predecessors, (28297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9515 states to 9515 states and 28297 transitions. [2021-05-22 02:27:12,598 INFO L78 Accepts]: Start accepts. Automaton has 9515 states and 28297 transitions. Word has length 39 [2021-05-22 02:27:12,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:12,599 INFO L482 AbstractCegarLoop]: Abstraction has 9515 states and 28297 transitions. [2021-05-22 02:27:12,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:12,599 INFO L276 IsEmpty]: Start isEmpty. Operand 9515 states and 28297 transitions. [2021-05-22 02:27:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:12,610 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:12,610 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:12,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-22 02:27:12,610 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:12,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:12,610 INFO L82 PathProgramCache]: Analyzing trace with hash -467836166, now seen corresponding path program 34 times [2021-05-22 02:27:12,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:12,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125485938] [2021-05-22 02:27:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:12,647 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 02:27:12,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:12,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125485938] [2021-05-22 02:27:12,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125485938] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:12,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:12,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:27:12,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467993335] [2021-05-22 02:27:12,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:27:12,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:12,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:27:12,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:27:12,648 INFO L87 Difference]: Start difference. First operand 9515 states and 28297 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:12,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:12,887 INFO L93 Difference]: Finished difference Result 14734 states and 43845 transitions. [2021-05-22 02:27:12,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:27:12,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:12,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:12,907 INFO L225 Difference]: With dead ends: 14734 [2021-05-22 02:27:12,907 INFO L226 Difference]: Without dead ends: 14686 [2021-05-22 02:27:12,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:27:12,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14686 states. [2021-05-22 02:27:13,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14686 to 9376. [2021-05-22 02:27:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9376 states, 9375 states have (on average 2.9634133333333335) internal successors, (27782), 9375 states have internal predecessors, (27782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:13,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9376 states to 9376 states and 27782 transitions. [2021-05-22 02:27:13,051 INFO L78 Accepts]: Start accepts. Automaton has 9376 states and 27782 transitions. Word has length 39 [2021-05-22 02:27:13,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:13,051 INFO L482 AbstractCegarLoop]: Abstraction has 9376 states and 27782 transitions. [2021-05-22 02:27:13,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:13,052 INFO L276 IsEmpty]: Start isEmpty. Operand 9376 states and 27782 transitions. [2021-05-22 02:27:13,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:13,063 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:13,063 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:13,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-22 02:27:13,063 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:13,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:13,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1133062906, now seen corresponding path program 35 times [2021-05-22 02:27:13,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:13,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206751590] [2021-05-22 02:27:13,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:13,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:13,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206751590] [2021-05-22 02:27:13,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206751590] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:13,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:13,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:27:13,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635039633] [2021-05-22 02:27:13,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:27:13,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:13,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:27:13,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:27:13,116 INFO L87 Difference]: Start difference. First operand 9376 states and 27782 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:13,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:13,378 INFO L93 Difference]: Finished difference Result 14599 states and 43322 transitions. [2021-05-22 02:27:13,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:27:13,379 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:13,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:13,398 INFO L225 Difference]: With dead ends: 14599 [2021-05-22 02:27:13,398 INFO L226 Difference]: Without dead ends: 14479 [2021-05-22 02:27:13,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:27:13,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14479 states. [2021-05-22 02:27:13,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14479 to 9268. [2021-05-22 02:27:13,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9268 states, 9267 states have (on average 2.9584547318441783) internal successors, (27416), 9267 states have internal predecessors, (27416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:13,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9268 states to 9268 states and 27416 transitions. [2021-05-22 02:27:13,535 INFO L78 Accepts]: Start accepts. Automaton has 9268 states and 27416 transitions. Word has length 39 [2021-05-22 02:27:13,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:13,535 INFO L482 AbstractCegarLoop]: Abstraction has 9268 states and 27416 transitions. [2021-05-22 02:27:13,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:13,535 INFO L276 IsEmpty]: Start isEmpty. Operand 9268 states and 27416 transitions. [2021-05-22 02:27:13,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:13,545 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:13,545 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:13,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-22 02:27:13,546 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:13,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:13,546 INFO L82 PathProgramCache]: Analyzing trace with hash -545879528, now seen corresponding path program 36 times [2021-05-22 02:27:13,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:13,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920316352] [2021-05-22 02:27:13,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:13,656 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 02:27:13,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:13,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920316352] [2021-05-22 02:27:13,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920316352] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:13,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:13,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-22 02:27:13,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444238463] [2021-05-22 02:27:13,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:27:13,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:13,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:27:13,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:27:13,657 INFO L87 Difference]: Start difference. First operand 9268 states and 27416 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:13,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:13,993 INFO L93 Difference]: Finished difference Result 14208 states and 42268 transitions. [2021-05-22 02:27:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:27:13,994 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:13,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:14,020 INFO L225 Difference]: With dead ends: 14208 [2021-05-22 02:27:14,020 INFO L226 Difference]: Without dead ends: 14016 [2021-05-22 02:27:14,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:27:14,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14016 states. [2021-05-22 02:27:14,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14016 to 9164. [2021-05-22 02:27:14,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9164 states, 9163 states have (on average 2.960820691913129) internal successors, (27130), 9163 states have internal predecessors, (27130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:14,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9164 states to 9164 states and 27130 transitions. [2021-05-22 02:27:14,222 INFO L78 Accepts]: Start accepts. Automaton has 9164 states and 27130 transitions. Word has length 39 [2021-05-22 02:27:14,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:14,222 INFO L482 AbstractCegarLoop]: Abstraction has 9164 states and 27130 transitions. [2021-05-22 02:27:14,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:14,222 INFO L276 IsEmpty]: Start isEmpty. Operand 9164 states and 27130 transitions. [2021-05-22 02:27:14,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:14,234 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:14,234 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:14,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-22 02:27:14,234 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:14,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:14,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1948403812, now seen corresponding path program 37 times [2021-05-22 02:27:14,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:14,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574757898] [2021-05-22 02:27:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:14,290 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 02:27:14,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:14,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574757898] [2021-05-22 02:27:14,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574757898] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:14,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:14,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-22 02:27:14,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358513732] [2021-05-22 02:27:14,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:27:14,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:14,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:27:14,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:27:14,291 INFO L87 Difference]: Start difference. First operand 9164 states and 27130 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:14,645 INFO L93 Difference]: Finished difference Result 14134 states and 42012 transitions. [2021-05-22 02:27:14,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:27:14,646 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:14,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:14,665 INFO L225 Difference]: With dead ends: 14134 [2021-05-22 02:27:14,665 INFO L226 Difference]: Without dead ends: 13966 [2021-05-22 02:27:14,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:27:14,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13966 states. [2021-05-22 02:27:14,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13966 to 9158. [2021-05-22 02:27:14,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9158 states, 9157 states have (on average 2.9588293109096866) internal successors, (27094), 9157 states have internal predecessors, (27094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9158 states to 9158 states and 27094 transitions. [2021-05-22 02:27:14,803 INFO L78 Accepts]: Start accepts. Automaton has 9158 states and 27094 transitions. Word has length 39 [2021-05-22 02:27:14,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:14,803 INFO L482 AbstractCegarLoop]: Abstraction has 9158 states and 27094 transitions. [2021-05-22 02:27:14,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:14,804 INFO L276 IsEmpty]: Start isEmpty. Operand 9158 states and 27094 transitions. [2021-05-22 02:27:14,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:14,814 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:14,814 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:14,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-22 02:27:14,815 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:14,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:14,815 INFO L82 PathProgramCache]: Analyzing trace with hash -426772262, now seen corresponding path program 38 times [2021-05-22 02:27:14,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:14,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062997073] [2021-05-22 02:27:14,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:14,852 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 02:27:14,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:14,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062997073] [2021-05-22 02:27:14,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062997073] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:14,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:14,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:27:14,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696525314] [2021-05-22 02:27:14,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:27:14,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:14,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:27:14,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:27:14,854 INFO L87 Difference]: Start difference. First operand 9158 states and 27094 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:15,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:15,083 INFO L93 Difference]: Finished difference Result 14594 states and 43056 transitions. [2021-05-22 02:27:15,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:27:15,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:15,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:15,105 INFO L225 Difference]: With dead ends: 14594 [2021-05-22 02:27:15,105 INFO L226 Difference]: Without dead ends: 14466 [2021-05-22 02:27:15,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:27:15,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14466 states. [2021-05-22 02:27:15,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14466 to 9094. [2021-05-22 02:27:15,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9094 states, 9093 states have (on average 2.9493016606180578) internal successors, (26818), 9093 states have internal predecessors, (26818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9094 states to 9094 states and 26818 transitions. [2021-05-22 02:27:15,322 INFO L78 Accepts]: Start accepts. Automaton has 9094 states and 26818 transitions. Word has length 39 [2021-05-22 02:27:15,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:15,322 INFO L482 AbstractCegarLoop]: Abstraction has 9094 states and 26818 transitions. [2021-05-22 02:27:15,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:15,322 INFO L276 IsEmpty]: Start isEmpty. Operand 9094 states and 26818 transitions. [2021-05-22 02:27:15,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:15,332 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:15,332 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:15,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-22 02:27:15,332 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:15,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:15,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1978893530, now seen corresponding path program 39 times [2021-05-22 02:27:15,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:15,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354122198] [2021-05-22 02:27:15,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:15,382 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 02:27:15,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:15,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354122198] [2021-05-22 02:27:15,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354122198] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:15,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:15,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:27:15,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382314442] [2021-05-22 02:27:15,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:27:15,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:15,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:27:15,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:27:15,384 INFO L87 Difference]: Start difference. First operand 9094 states and 26818 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:15,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:15,651 INFO L93 Difference]: Finished difference Result 14494 states and 42702 transitions. [2021-05-22 02:27:15,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:27:15,651 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:15,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:15,670 INFO L225 Difference]: With dead ends: 14494 [2021-05-22 02:27:15,670 INFO L226 Difference]: Without dead ends: 14022 [2021-05-22 02:27:15,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:27:15,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14022 states. [2021-05-22 02:27:15,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14022 to 8890. [2021-05-22 02:27:15,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8890 states, 8889 states have (on average 2.937338283271459) internal successors, (26110), 8889 states have internal predecessors, (26110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:15,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8890 states to 8890 states and 26110 transitions. [2021-05-22 02:27:15,801 INFO L78 Accepts]: Start accepts. Automaton has 8890 states and 26110 transitions. Word has length 39 [2021-05-22 02:27:15,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:15,801 INFO L482 AbstractCegarLoop]: Abstraction has 8890 states and 26110 transitions. [2021-05-22 02:27:15,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:15,801 INFO L276 IsEmpty]: Start isEmpty. Operand 8890 states and 26110 transitions. [2021-05-22 02:27:15,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:15,810 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:15,811 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:15,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-22 02:27:15,811 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:15,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1231907832, now seen corresponding path program 40 times [2021-05-22 02:27:15,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:15,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477232352] [2021-05-22 02:27:15,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:15,860 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 02:27:15,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:15,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477232352] [2021-05-22 02:27:15,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477232352] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:15,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:15,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-22 02:27:15,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878462126] [2021-05-22 02:27:15,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:27:15,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:15,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:27:15,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:27:15,861 INFO L87 Difference]: Start difference. First operand 8890 states and 26110 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:16,160 INFO L93 Difference]: Finished difference Result 14086 states and 41514 transitions. [2021-05-22 02:27:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:27:16,160 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:16,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:16,181 INFO L225 Difference]: With dead ends: 14086 [2021-05-22 02:27:16,181 INFO L226 Difference]: Without dead ends: 13386 [2021-05-22 02:27:16,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:27:16,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13386 states. [2021-05-22 02:27:16,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13386 to 8674. [2021-05-22 02:27:16,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8674 states, 8673 states have (on average 2.945462930935086) internal successors, (25546), 8673 states have internal predecessors, (25546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8674 states to 8674 states and 25546 transitions. [2021-05-22 02:27:16,318 INFO L78 Accepts]: Start accepts. Automaton has 8674 states and 25546 transitions. Word has length 39 [2021-05-22 02:27:16,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:16,318 INFO L482 AbstractCegarLoop]: Abstraction has 8674 states and 25546 transitions. [2021-05-22 02:27:16,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:16,318 INFO L276 IsEmpty]: Start isEmpty. Operand 8674 states and 25546 transitions. [2021-05-22 02:27:16,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:16,328 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:16,328 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:16,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-22 02:27:16,328 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:16,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:16,328 INFO L82 PathProgramCache]: Analyzing trace with hash 64823676, now seen corresponding path program 41 times [2021-05-22 02:27:16,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:16,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037731487] [2021-05-22 02:27:16,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:16,380 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 02:27:16,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:16,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037731487] [2021-05-22 02:27:16,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037731487] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:16,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:16,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-22 02:27:16,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200877730] [2021-05-22 02:27:16,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:27:16,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:16,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:27:16,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:27:16,381 INFO L87 Difference]: Start difference. First operand 8674 states and 25546 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:16,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:16,744 INFO L93 Difference]: Finished difference Result 13828 states and 40806 transitions. [2021-05-22 02:27:16,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:27:16,745 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:16,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:16,764 INFO L225 Difference]: With dead ends: 13828 [2021-05-22 02:27:16,764 INFO L226 Difference]: Without dead ends: 13182 [2021-05-22 02:27:16,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:27:16,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13182 states. [2021-05-22 02:27:16,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13182 to 8470. [2021-05-22 02:27:16,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8470 states, 8469 states have (on average 2.964694769158106) internal successors, (25108), 8469 states have internal predecessors, (25108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:16,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8470 states to 8470 states and 25108 transitions. [2021-05-22 02:27:16,903 INFO L78 Accepts]: Start accepts. Automaton has 8470 states and 25108 transitions. Word has length 39 [2021-05-22 02:27:16,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:16,903 INFO L482 AbstractCegarLoop]: Abstraction has 8470 states and 25108 transitions. [2021-05-22 02:27:16,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:16,903 INFO L276 IsEmpty]: Start isEmpty. Operand 8470 states and 25108 transitions. [2021-05-22 02:27:16,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:16,913 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:16,913 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:16,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-22 02:27:16,913 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:16,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:16,914 INFO L82 PathProgramCache]: Analyzing trace with hash -695140544, now seen corresponding path program 42 times [2021-05-22 02:27:16,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:16,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953022474] [2021-05-22 02:27:16,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:16,968 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 02:27:16,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:16,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953022474] [2021-05-22 02:27:16,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953022474] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:16,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:16,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-22 02:27:16,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113736234] [2021-05-22 02:27:16,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:27:16,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:16,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:27:16,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:27:16,969 INFO L87 Difference]: Start difference. First operand 8470 states and 25108 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:17,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:17,393 INFO L93 Difference]: Finished difference Result 13371 states and 39611 transitions. [2021-05-22 02:27:17,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:27:17,393 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:17,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:17,419 INFO L225 Difference]: With dead ends: 13371 [2021-05-22 02:27:17,420 INFO L226 Difference]: Without dead ends: 12735 [2021-05-22 02:27:17,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:27:17,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12735 states. [2021-05-22 02:27:17,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12735 to 7590. [2021-05-22 02:27:17,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7590 states, 7589 states have (on average 2.960469100013177) internal successors, (22467), 7589 states have internal predecessors, (22467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:17,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7590 states to 7590 states and 22467 transitions. [2021-05-22 02:27:17,554 INFO L78 Accepts]: Start accepts. Automaton has 7590 states and 22467 transitions. Word has length 39 [2021-05-22 02:27:17,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:17,554 INFO L482 AbstractCegarLoop]: Abstraction has 7590 states and 22467 transitions. [2021-05-22 02:27:17,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:17,554 INFO L276 IsEmpty]: Start isEmpty. Operand 7590 states and 22467 transitions. [2021-05-22 02:27:17,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:17,563 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:17,564 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:17,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-22 02:27:17,564 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:17,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:17,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1794340302, now seen corresponding path program 43 times [2021-05-22 02:27:17,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:17,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170414039] [2021-05-22 02:27:17,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:17,606 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 02:27:17,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:17,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170414039] [2021-05-22 02:27:17,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170414039] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:17,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:17,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:27:17,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180720367] [2021-05-22 02:27:17,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:27:17,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:17,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:27:17,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:27:17,608 INFO L87 Difference]: Start difference. First operand 7590 states and 22467 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:17,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:17,876 INFO L93 Difference]: Finished difference Result 12745 states and 37674 transitions. [2021-05-22 02:27:17,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:27:17,877 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:17,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:17,895 INFO L225 Difference]: With dead ends: 12745 [2021-05-22 02:27:17,895 INFO L226 Difference]: Without dead ends: 12601 [2021-05-22 02:27:17,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:27:17,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12601 states. [2021-05-22 02:27:17,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12601 to 7346. [2021-05-22 02:27:18,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7346 states, 7345 states have (on average 2.9400953029271615) internal successors, (21595), 7345 states have internal predecessors, (21595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:18,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7346 states to 7346 states and 21595 transitions. [2021-05-22 02:27:18,014 INFO L78 Accepts]: Start accepts. Automaton has 7346 states and 21595 transitions. Word has length 39 [2021-05-22 02:27:18,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:18,014 INFO L482 AbstractCegarLoop]: Abstraction has 7346 states and 21595 transitions. [2021-05-22 02:27:18,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:18,014 INFO L276 IsEmpty]: Start isEmpty. Operand 7346 states and 21595 transitions. [2021-05-22 02:27:18,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:18,023 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:18,023 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:18,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-22 02:27:18,023 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:18,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:18,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1613437490, now seen corresponding path program 44 times [2021-05-22 02:27:18,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:18,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819059177] [2021-05-22 02:27:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:18,076 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 02:27:18,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:18,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819059177] [2021-05-22 02:27:18,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819059177] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:18,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:18,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-22 02:27:18,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657845981] [2021-05-22 02:27:18,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:27:18,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:18,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:27:18,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:27:18,077 INFO L87 Difference]: Start difference. First operand 7346 states and 21595 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:18,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:18,401 INFO L93 Difference]: Finished difference Result 11821 states and 34814 transitions. [2021-05-22 02:27:18,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:27:18,401 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:18,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:18,417 INFO L225 Difference]: With dead ends: 11821 [2021-05-22 02:27:18,417 INFO L226 Difference]: Without dead ends: 11629 [2021-05-22 02:27:18,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:27:18,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11629 states. [2021-05-22 02:27:18,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11629 to 7242. [2021-05-22 02:27:18,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7242 states, 7241 states have (on average 2.9428255765778206) internal successors, (21309), 7241 states have internal predecessors, (21309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7242 states to 7242 states and 21309 transitions. [2021-05-22 02:27:18,534 INFO L78 Accepts]: Start accepts. Automaton has 7242 states and 21309 transitions. Word has length 39 [2021-05-22 02:27:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:18,534 INFO L482 AbstractCegarLoop]: Abstraction has 7242 states and 21309 transitions. [2021-05-22 02:27:18,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 7242 states and 21309 transitions. [2021-05-22 02:27:18,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:18,543 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:18,543 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:18,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-22 02:27:18,543 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:18,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:18,544 INFO L82 PathProgramCache]: Analyzing trace with hash -798629012, now seen corresponding path program 45 times [2021-05-22 02:27:18,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:18,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403570581] [2021-05-22 02:27:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:18,601 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 02:27:18,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:18,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403570581] [2021-05-22 02:27:18,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403570581] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:18,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:18,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-22 02:27:18,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360845417] [2021-05-22 02:27:18,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:27:18,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:18,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:27:18,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:27:18,602 INFO L87 Difference]: Start difference. First operand 7242 states and 21309 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:18,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:18,989 INFO L93 Difference]: Finished difference Result 11315 states and 33296 transitions. [2021-05-22 02:27:18,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:27:18,990 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:18,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:19,006 INFO L225 Difference]: With dead ends: 11315 [2021-05-22 02:27:19,006 INFO L226 Difference]: Without dead ends: 11099 [2021-05-22 02:27:19,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:27:19,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11099 states. [2021-05-22 02:27:19,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11099 to 7008. [2021-05-22 02:27:19,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7008 states, 7007 states have (on average 2.97445411731126) internal successors, (20842), 7007 states have internal predecessors, (20842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7008 states to 7008 states and 20842 transitions. [2021-05-22 02:27:19,119 INFO L78 Accepts]: Start accepts. Automaton has 7008 states and 20842 transitions. Word has length 39 [2021-05-22 02:27:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:19,119 INFO L482 AbstractCegarLoop]: Abstraction has 7008 states and 20842 transitions. [2021-05-22 02:27:19,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,119 INFO L276 IsEmpty]: Start isEmpty. Operand 7008 states and 20842 transitions. [2021-05-22 02:27:19,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:19,128 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:19,128 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:19,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-22 02:27:19,128 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:19,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:19,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1518942532, now seen corresponding path program 46 times [2021-05-22 02:27:19,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:19,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549179233] [2021-05-22 02:27:19,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:19,153 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 02:27:19,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:19,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549179233] [2021-05-22 02:27:19,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549179233] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:19,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:19,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:27:19,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653944892] [2021-05-22 02:27:19,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:27:19,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:19,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:27:19,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:27:19,154 INFO L87 Difference]: Start difference. First operand 7008 states and 20842 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:19,265 INFO L93 Difference]: Finished difference Result 9444 states and 26929 transitions. [2021-05-22 02:27:19,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:27:19,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:19,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:19,281 INFO L225 Difference]: With dead ends: 9444 [2021-05-22 02:27:19,281 INFO L226 Difference]: Without dead ends: 8824 [2021-05-22 02:27:19,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:27:19,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8824 states. [2021-05-22 02:27:19,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8824 to 4125. [2021-05-22 02:27:19,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4125 states, 4124 states have (on average 2.908341416100873) internal successors, (11994), 4124 states have internal predecessors, (11994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4125 states to 4125 states and 11994 transitions. [2021-05-22 02:27:19,384 INFO L78 Accepts]: Start accepts. Automaton has 4125 states and 11994 transitions. Word has length 39 [2021-05-22 02:27:19,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:19,384 INFO L482 AbstractCegarLoop]: Abstraction has 4125 states and 11994 transitions. [2021-05-22 02:27:19,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,384 INFO L276 IsEmpty]: Start isEmpty. Operand 4125 states and 11994 transitions. [2021-05-22 02:27:19,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:19,390 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:19,390 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:19,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-22 02:27:19,390 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:19,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:19,391 INFO L82 PathProgramCache]: Analyzing trace with hash -236999486, now seen corresponding path program 47 times [2021-05-22 02:27:19,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:19,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242017035] [2021-05-22 02:27:19,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:19,435 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 02:27:19,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:19,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242017035] [2021-05-22 02:27:19,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242017035] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:19,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:19,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:27:19,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257269986] [2021-05-22 02:27:19,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:27:19,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:19,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:27:19,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:27:19,437 INFO L87 Difference]: Start difference. First operand 4125 states and 11994 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:19,587 INFO L93 Difference]: Finished difference Result 6107 states and 16719 transitions. [2021-05-22 02:27:19,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:27:19,588 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:19,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:19,593 INFO L225 Difference]: With dead ends: 6107 [2021-05-22 02:27:19,593 INFO L226 Difference]: Without dead ends: 4693 [2021-05-22 02:27:19,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:27:19,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4693 states. [2021-05-22 02:27:19,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4693 to 2542. [2021-05-22 02:27:19,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2542 states, 2541 states have (on average 2.786698150334514) internal successors, (7081), 2541 states have internal predecessors, (7081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2542 states to 2542 states and 7081 transitions. [2021-05-22 02:27:19,624 INFO L78 Accepts]: Start accepts. Automaton has 2542 states and 7081 transitions. Word has length 39 [2021-05-22 02:27:19,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:19,624 INFO L482 AbstractCegarLoop]: Abstraction has 2542 states and 7081 transitions. [2021-05-22 02:27:19,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2542 states and 7081 transitions. [2021-05-22 02:27:19,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:19,626 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:19,626 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:19,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-22 02:27:19,626 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:19,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:19,626 INFO L82 PathProgramCache]: Analyzing trace with hash -634778652, now seen corresponding path program 48 times [2021-05-22 02:27:19,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:19,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881863109] [2021-05-22 02:27:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:19,671 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 02:27:19,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:19,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881863109] [2021-05-22 02:27:19,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881863109] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:19,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:19,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-22 02:27:19,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625243636] [2021-05-22 02:27:19,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:27:19,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:19,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:27:19,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:27:19,673 INFO L87 Difference]: Start difference. First operand 2542 states and 7081 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:19,865 INFO L93 Difference]: Finished difference Result 1862 states and 4307 transitions. [2021-05-22 02:27:19,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:27:19,865 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:19,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:19,866 INFO L225 Difference]: With dead ends: 1862 [2021-05-22 02:27:19,866 INFO L226 Difference]: Without dead ends: 648 [2021-05-22 02:27:19,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:27:19,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-05-22 02:27:19,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 456. [2021-05-22 02:27:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 2.4329670329670328) internal successors, (1107), 455 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1107 transitions. [2021-05-22 02:27:19,871 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1107 transitions. Word has length 39 [2021-05-22 02:27:19,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:19,871 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1107 transitions. [2021-05-22 02:27:19,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,871 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1107 transitions. [2021-05-22 02:27:19,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:27:19,872 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:19,872 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:19,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-22 02:27:19,872 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:19,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:19,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1819342244, now seen corresponding path program 49 times [2021-05-22 02:27:19,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:19,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026825881] [2021-05-22 02:27:19,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:19,925 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 02:27:19,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:19,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026825881] [2021-05-22 02:27:19,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026825881] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:27:19,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:27:19,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-22 02:27:19,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473498492] [2021-05-22 02:27:19,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:27:19,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:19,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:27:19,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:27:19,927 INFO L87 Difference]: Start difference. First operand 456 states and 1107 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:20,082 INFO L93 Difference]: Finished difference Result 391 states and 811 transitions. [2021-05-22 02:27:20,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:27:20,082 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-05-22 02:27:20,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:20,082 INFO L225 Difference]: With dead ends: 391 [2021-05-22 02:27:20,082 INFO L226 Difference]: Without dead ends: 0 [2021-05-22 02:27:20,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:20,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-22 02:27:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-22 02:27:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:20,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-22 02:27:20,083 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2021-05-22 02:27:20,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:20,083 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-22 02:27:20,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:20,083 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-22 02:27:20,083 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 02:27:20,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-22 02:27:20,084 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-05-22 02:27:20,085 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-22 02:27:20,086 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:27:20,086 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:27:20,086 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:27:20,086 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:27:20,086 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:27:20,086 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:27:20,086 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:27:20,086 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 02:27:20,087 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 62 places, 46 transitions, 132 flow [2021-05-22 02:27:20,853 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 12446 states, 12444 states have (on average 4.187078109932497) internal successors, (52104), 12445 states have internal predecessors, (52104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:20,872 INFO L276 IsEmpty]: Start isEmpty. Operand has 12446 states, 12444 states have (on average 4.187078109932497) internal successors, (52104), 12445 states have internal predecessors, (52104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:20,909 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 02:27:20,910 INFO L315 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2021-05-22 02:27:20,910 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-22 02:27:20,912 INFO L202 PluginConnector]: Adding new model ticket-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.05 02:27:20 BasicIcfg [2021-05-22 02:27:20,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-22 02:27:20,912 INFO L168 Benchmark]: Toolchain (without parser) took 50808.04 ms. Allocated memory was 314.6 MB in the beginning and 14.7 GB in the end (delta: 14.4 GB). Free memory was 293.8 MB in the beginning and 9.6 GB in the end (delta: -9.3 GB). Peak memory consumption was 5.1 GB. Max. memory is 16.0 GB. [2021-05-22 02:27:20,912 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 314.6 MB. Free memory is still 295.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:27:20,912 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.67 ms. Allocated memory is still 314.6 MB. Free memory was 293.7 MB in the beginning and 292.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:27:20,912 INFO L168 Benchmark]: Boogie Preprocessor took 20.09 ms. Allocated memory is still 314.6 MB. Free memory was 292.2 MB in the beginning and 291.3 MB in the end (delta: 914.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:27:20,912 INFO L168 Benchmark]: RCFGBuilder took 362.00 ms. Allocated memory is still 314.6 MB. Free memory was 291.2 MB in the beginning and 276.1 MB in the end (delta: 15.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-05-22 02:27:20,912 INFO L168 Benchmark]: TraceAbstraction took 50394.85 ms. Allocated memory was 314.6 MB in the beginning and 14.7 GB in the end (delta: 14.4 GB). Free memory was 275.7 MB in the beginning and 9.6 GB in the end (delta: -9.3 GB). Peak memory consumption was 5.1 GB. Max. memory is 16.0 GB. [2021-05-22 02:27:20,913 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 0.12 ms. Allocated memory is still 314.6 MB. Free memory is still 295.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.67 ms. Allocated memory is still 314.6 MB. Free memory was 293.7 MB in the beginning and 292.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.09 ms. Allocated memory is still 314.6 MB. Free memory was 292.2 MB in the beginning and 291.3 MB in the end (delta: 914.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 362.00 ms. Allocated memory is still 314.6 MB. Free memory was 291.2 MB in the beginning and 276.1 MB in the end (delta: 15.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 50394.85 ms. Allocated memory was 314.6 MB in the beginning and 14.7 GB in the end (delta: 14.4 GB). Free memory was 275.7 MB in the beginning and 9.6 GB in the end (delta: -9.3 GB). Peak memory consumption was 5.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 95]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 11 procedures, 83 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 49428.2ms, OverallIterations: 49, TraceHistogramMax: 1, EmptinessCheckTime: 1470.2ms, AutomataDifference: 19733.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 926.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3808 SDtfs, 5398 SDslu, 13350 SDs, 0 SdLazy, 14188 SolverSat, 2216 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7322.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 608 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 478 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2401.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28621occurred in iteration=13, InterpolantAutomatonStates: 480, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 24061.1ms AutomataMinimizationTime, 49 MinimizatonAttempts, 461380 StatesRemovedByMinimization, 46 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 70.4ms SsaConstructionTime, 436.4ms SatisfiabilityAnalysisTime, 2311.8ms InterpolantComputationTime, 1911 NumberOfCodeBlocks, 1911 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 1862 ConstructedInterpolants, 0 QuantifiedInterpolants, 5436 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 49 InterpolantComputations, 49 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 11 procedures, 83 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 823.8ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 55.9ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 767.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=12446occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...